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Secretary problem

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890: 6570: 364: 3858: 4770: 22: 885:{\displaystyle {\begin{aligned}P(r)&=\sum _{i=1}^{n}P\left({\text{applicant }}i{\text{ is selected}}\cap {\text{applicant }}i{\text{ is the best}}\right)\\&=\sum _{i=1}^{n}P\left({\text{applicant }}i{\text{ is selected}}|{\text{applicant }}i{\text{ is the best}}\right)\cdot P\left({\text{applicant }}i{\text{ is the best}}\right)\\&=\left\cdot {\frac {1}{n}}\\&=\left\cdot {\frac {1}{n}}\\&={\frac {r-1}{n}}\sum _{i=r}^{n}{\frac {1}{i-1}}.\end{aligned}}} 6350:
are faced with problems where the decision alternatives are encountered sequentially. For example, when trying to decide at which gas station along a highway to stop for gas, people might not search enough before stopping. If true, then they would tend to pay more for gas than if they had searched longer. The same may be true when people search online for airline tickets. Experimental research on problems such as the secretary problem is sometimes referred to as
6556: 2049:(1 followed by a hundred zeroes) or even larger. These slips are turned face down and shuffled over the top of a table. One at a time you turn the slips face up. The aim is to stop turning when you come to the number that you guess to be the largest of the series. You cannot go back and pick a previously turned slip. If you turn over all the slips, then of course you must pick the last one turned. 5154:
corresponding optimal decisions and outcomes if the interviewer had been given full information about the value of each applicant. This full-information problem, in which applicants are drawn independently from a known distribution and the interviewer seeks to maximize the expected value of the applicant selected, was originally solved by Moser (1956), Sakaguchi (1961), and Karlin (1962).
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applicants coming in random order. When a candidate arrives, she reveals a set of nonnegative numbers. Each value specifies her qualification for one of the jobs. The administrator not only has to decide whether or not to take the applicant but, if so, also has to assign her permanently to one of the
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rankable applicants for a position. The applicants are interviewed one by one in random order. A decision about each particular applicant is to be made immediately after the interview. Once rejected, an applicant cannot be recalled. During the interview, the administrator gains information sufficient
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as they continue the search process by accumulating a set of past data points that they can use to evaluate new candidates as they arrive. A benefit of this so-called partial-information model is that decisions and outcomes achieved given the relative rank information can be directly compared to the
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of actual people in secretary problem situations. In large part, this work has shown that people tend to stop searching too soon. This may be explained, at least in part, by the cost of evaluating candidates. In real world settings, this might suggest that people do not search enough whenever they
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The essence of the model is based on the idea that life is sequential and that real-world problems pose themselves in real time. Also, it is easier to estimate times in which specific events (arrivals of applicants) should occur more frequently (if they do) than to estimate the distribution of the
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Learning in the partial-information sequential search paradigm. The numbers display the expected values of applicants based on their relative rank (out of m total applicants seen so far) at various points in the search. Expectations are calculated based on the case when their values are uniformly
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Finding the single best applicant might seem like a rather strict objective. One can imagine that the interviewer would rather hire a higher-valued applicant than a lower-valued one, and not only be concerned with getting the best. That is, the interviewer will derive some value from selecting an
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The 1/e-law is sometimes confused with the solution for the classical secretary problem described above because of the similar role of the number 1/e. However, in the 1/e-law, this role is more general. The result is also stronger, since it holds for an unknown number of applicants and since the
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in Scientific American, February 1960. He had heard about it from John H. Fox Jr., and L. Gerald Marnie, who had independently come up with an equivalent problem in 1958; they called it the "game of googol". Fox and Marnie did not know the optimum solution; Gardner asked for advice from
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A more general form of this problem introduced by Palley and Kremer (2014) assumes that as each new applicant arrives, the interviewer observes their rank relative to all of the applicants that have been observed previously. This model is consistent with the notion of an interviewer
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By the rules of the game, Alice's sequence must be exchangeable, but to do well in the game, Alice should not pick it to be independent. If Alice samples the numbers independently from some fixed distribution, it would allow Bob to do better. To see this intuitively, imagine if
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of rankable applicants. The goal is to maximize the probability of selecting only the best under the hypothesis that all arrival orders of different ranks are equally likely. Suppose that all applicants have the same, but independent to each other, arrival time density
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is used to mean "reject immediately after the interview". Since the objective in the problem is to select the single best applicant, only candidates will be considered for acceptance. The "candidate" in this context corresponds to the concept of record in permutation.
274:. One reason why the secretary problem has received so much attention is that the optimal policy for the problem (the stopping rule) is simple and selects the single best candidate about 37% of the time, irrespective of whether there are 100 or 100 million applicants. 3243: 2853: 6366:
research on information integration, or the representation of belief, in perceptual decision-making tasks using both animal and human subjects, there is relatively little known about how the decision to stop gathering information is arrived at.
354:. It can be shown that the optimal strategy lies in this class of strategies. (Note that we should never choose an applicant who is not the best we have seen so far, since they cannot be the best overall applicant.) For an arbitrary cutoff 312:
The objective of the general solution is to have the highest probability of selecting the best applicant of the whole group. This is the same as maximizing the expected payoff, with payoff defined to be one for the best applicant and zero
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is given by the true value of the selected applicant. For example, if he/she selects an applicant whose true value is 0.8, then he/she will earn 0.8. The interviewer's objective is to maximize the expected value of the selected applicant.
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the interviewer will begin accepting applicants sooner in the cardinal payoff version than in the classical version where the objective is to select the single best applicant. Note that this is not an asymptotic result: It holds for all
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The solution of the secretary problem is only meaningful if it is justified to assume that the applicants have no knowledge of the decision strategy employed, because early applicants have no chance at all and may not show up otherwise.
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applicants that are interviewed and then stopping at the first applicant who is better than every applicant interviewed so far (or continuing to the last applicant if this never occurs). Sometimes this strategy is called the
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but typically lower. This can be understood in the context of having a "price" to pay for not knowing the number of applicants. However, in this model the price is high. Depending on the choice of the distribution of
6143: 4170: 4069: 5300: 3892:-th encountered candidate. Note, that this rule does not necessarily skip any applicants; it only considers how many candidates have been observed, not how deep the decision maker is in the applicant sequence. 6001: 1067: 3846:, the answer is yes: Alice can choose random numbers (which are dependent random variables) in such a way that Bob cannot play better than using the classical stopping strategy based on the relative ranks. 3092: 3876:
applicants; thereafter, select the first encountered candidate (i.e., an applicant with relative rank 1). This rule has as a special case the optimal policy for the classical secretary problem for which
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on . Similar to the classical problem described above, the interviewer only observes whether each applicant is the best so far (a candidate), must accept or reject each on the spot, and
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Ask someone to take as many slips of paper as he pleases, and on each slip write a different positive number. The numbers may range from small fractions of 1 to a number the size of a
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jobs. The objective is to find an assignment where the sum of qualifications is as big as possible. This problem is identical to finding a maximum-weight matching in an edge-weighted
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Kesselheim, Thomas; Radke, Klaus; Tönnis, Andreas; Vöcking, Berthold (2013). "An Optimal Online Algorithm for Weighted Bipartite Matching and Extensions to Combinatorial Auctions".
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and J. Robbins, outlining a proof of the optimum strategy, with an appendix by R. Palermo who proved that all strategies are dominated by a strategy of the form "reject the first
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derived the expected success probabilities for several psychologically plausible heuristics that might be employed in the secretary problem. The heuristics they examined were:
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By a generalization of the classic algorithm for the secretary problem, it is possible to obtain an assignment where the expected sum of qualifications is only a factor of
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distributed between 0 and 1. Relative rank information allows the interviewer to more finely evaluate applicants as they accumulate more data points to compare them to.
1479:(Presman and Sonin, 1972). For this model, the optimal solution is in general much harder, however. Moreover, the optimal success probability is now no longer around 1/ 5174:
calls this the "postdoc" problem arguing that the "best" will go to Harvard. For this problem, the probability of success for an even number of applicants is exactly
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Flood, Merrill R. (1958). "Proof of the optimum strategy". Letter to Martin Gardner. Martin Gardner papers series 1, box 5, folder 19: Stanford University Archives.
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of tracking the running maximum (and who achieved it), and selecting the overall maximum at the end. The difficulty is that the decision must be made immediately.
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to rank the applicant among all applicants interviewed so far, but is unaware of the quality of yet unseen applicants. The question is about the optimal strategy (
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Bob, the stopping player, observes the actual values and can stop turning cards whenever he wants, winning if the last card turned has the overall maximal number.
1504:, the optimal win probability can approach zero. Looking for ways to cope with this new problem led to a new model yielding the so-called 1/e-law of best choice. 252: 224: 154: 5722:
application officers, each holding one letter. You keep interviewing the candidates and rank them on a chart that every application officer can see. Now officer
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Bearden, J. Neil; Rapoport, Amnon; Murphy, Ryan O. (September 2006). "Sequential Observation and Selection with Rank-Dependent Payoffs: An Experimental Study".
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choices and wins if any choice is the best. An optimal strategy for this problem belongs to the class of strategies defined by a set of threshold numbers
6378:(MDP) was used to quantify the value of continuing to search versus committing to the current option. Decisions to take versus decline an option engaged 2366:, and not on their numerical values. In other words, it is as if someone secretly intervened after Alice picked her numbers, and changed each number in 1951:
However, there are many other strategies that achieve (i) and (ii) and, moreover, perform strictly better than the 1/e-strategy simultaneously for all
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must be known in advance, which is rarely the case. One way to overcome this problem is to suppose that the number of applicants is a random variable
117:) to maximize the probability of selecting the best applicant. If the decision can be deferred to the end, this can be solved by the simple maximum 7805:
Ketelaar, Timothy; Todd, Peter M. (2001). "Framing Our Thoughts: Ecological Rationality as Evolutionary Psychology's Answer to the Frame Problem".
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provided that at least one applicant arrived before this time, and otherwise selects (if possible) the second relatively best candidate after time
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Bob wants to guess the maximal number with the highest possible probability, while Alice's goal is to keep this probability as low as possible.
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Seale, D.A.; Rapoport, A. (1997). "Sequential decision making with relative ranks: An experimental investigation of the 'secretary problem'".
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on 9 May 1958, and it eventually became widely known in the folklore although nothing was published at the time. In 1958 he sent a letter to
2699:, the optimal relative rank stopping strategy is the optimal stopping rule for the secretary problem, given above, with a winning probability 7251:
Heekeren, Hauke R.; Marrett, Sean; Ungerleider, Leslie G. (9 May 2008). "The neural systems that mediate human perceptual decision making".
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Alice first writes down n numbers, which are then shuffled. So, their ordering does not matter, meaning that Alice's numbers must be an
5935: 1928:, came as a surprise. The reason was that a value of about 1/e had been considered before as being out of reach in a model for unknown 977: 5230:. This probability tends to 1/4 as n tends to infinity illustrating the fact that it is easier to pick the best than the second-best. 6464:
long before that, who spent 2 years investigating 11 candidates for marriage during 1611 -- 1613 after the death of his first wife.
5145:, with the same convexity claims as before. For other known distributions, optimal play can be calculated via dynamic programming. 7448:
Bearden, J.N.; Murphy, R.O.; Rapoport, A. (2005). "A multi-attribute extension of the secretary problem: Theory and experiments".
4621:{\displaystyle V_{n}(c)=\sum _{t=c}^{n-1}\left\left({\frac {1}{t+1}}\right)+\left{\frac {1}{2}}={\frac {2cn-{c}^{2}+c-n}{2cn}}.} 166:), and that the latter holds even in a much greater generality. The optimal stopping rule prescribes always rejecting the first 3280:, if Bob plays the optimal relative-rank stoppings strategy, then Bob has winning probability 1/2. Surprisingly, Alice has no 7882: 7822: 7679: 7408: 6795: 5789:. (Unsent letters of acceptance are by default given to the last applicants, the same as in the standard secretary problem.) 4781: 1379:
One important drawback for applications of the solution of the classical secretary problem is that the number of applicants
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This problem and several modifications can be solved (including the proof of optimality) in a straightforward manner by the
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The decision to accept or reject an applicant can be based only on the relative ranks of the applicants interviewed so far.
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Immediately after an interview, the interviewed applicant is either accepted or rejected, and the decision is irrevocable.
8046: 5583: 7965: 7834: 3238:{\displaystyle Pr(X_{\tau }=\max _{i\in 1:n}X_{i})\leq \max _{r\in 1:n}{\frac {r-1}{n}}\sum _{i=r}^{n}{\frac {1}{i-1}}} 7075: 3959: 92:
The basic form of the problem is the following: imagine an administrator who wants to hire the best secretary out of
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Ferguson has an extensive bibliography and points out that a similar (but different) problem had been considered by
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accept the last one if he/she is reached. (To be clear, the interviewer does not learn the actual relative rank of
2848:{\displaystyle Pr(X_{\tau }=\max _{i\in 1:n}X_{i})=\max _{r\in 1:n}{\frac {r-1}{n}}\sum _{i=r}^{n}{\frac {1}{i-1}}} 1971:>2. A simple example is the strategy which selects (if possible) the first relatively best candidate after time 8021:
sequence A054404 (Number of daughters to wait before picking in sultan's dowry problem with n daughters)
7204:"Response of Neurons in the Lateral Intraparietal Area during a Combined Visual Discrimination Reaction Time Task" 7037: 4175:
As in the classical problem, the optimal policy is given by a threshold, which for this problem we will denote by
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applicant that is not necessarily the best, and the derived value increases with the value of the one selected.
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The secretary problem can be generalized to the case where there are multiple different jobs. Again, there are
6383: 6351: 6026: 4961: 4232: 2100: 3907:. The figure (shown on right) displays the expected success probabilities for each heuristic as a function of 1651: 8452: 7942:
Stein, W.E.; Seale, D.A.; Rapoport, A. (2003). "Analysis of heuristic solutions to the best choice problem".
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stopping rule, because the probability of stopping at the best applicant with this strategy is already about
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Girdhar, Yogesh; Dudek, Gregory (2009). "Optimal Online Data Sampling or How to Hire the Best Secretaries".
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is defined as an applicant who, when interviewed, is better than all the applicants interviewed previously.
7606: 5821: 2369: 2304: 2212: 2121: 5795: 350: − 1 applicants), and then selects the first subsequent applicant that is better than applicant 8437: 7600: 7296:"Frontal-Parietal and Limbic-Striatal Activity Underlies Information Sampling in the Best Choice Problem" 5441: 8447: 6370:
Researchers have studied the neural bases of solving the secretary problem in healthy volunteers using
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applicant. He/she learns only whether the applicant has relative rank 1.) However, in this version the
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candidates without picking any one of them, then pick every candidate that is better than those first
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The remainder of the article deals again with the secretary problem for a known number of applicants.
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Bearden, Murphy, and Rapoport, 2006; Bearden, Rapoport, and Murphy, 2006; Seale and Rapoport, 1997;
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The probability of selecting the best applicant in the classical secretary problem converges toward
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number of specific events which will occur. This idea led to the following approach, the so-called
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The applicants are interviewed sequentially in random order, with each order being equally likely.
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There are several variants of the secretary problem that also have simple and elegant solutions.
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Alice's goal then is to make sure Bob cannot do better than the relative-rank stopping strategy.
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Bob observes the actual values written on the cards, which he can use in his decision procedures.
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Bearden, J.N. (2006). "A new secretary problem with rank-based selection and cardinal payoffs".
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would send their letter of acceptance to the first candidate that is better than all candidates
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Alice does not have to write numbers uniformly at random. She may write them according to any
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Sardelis, Dimitris A.; Valahas, Theodoros M. (March 1999). "Decision Making: A Golden Rule".
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Successive non-candidate rule (SNCR): Select the first encountered candidate after observing
3289: 2510: 2472: 2183:. Alice's strategy is then just picking the trickiest exchangeable random variable sequence. 911:
is the best applicant, then it is selected if and only if the best applicant among the first
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Consider the problem of picking the k best secretaries out of n candidates, using k tries.
3823: 2888: 1920:(iii) selects, if there is at least one applicant, none at all with probability exactly 1/e. 7156: 5874: 5765: 5407: 3621: 3498: 3375: 3348: 3072: 2280: 2192: 1994: 1974: 1839: 1819: 1753: 899:= 1, but in this case the only feasible policy is to select the first applicant, and hence 7832:
Matsui, T; Ano, K (2016). "Lower bounds for Bruss' odds problem with multiple stoppings".
6266:{\displaystyle e^{-1}+e^{-{\frac {3}{2}}}+e^{-{\frac {47}{24}}}+e^{-{\frac {2761}{1152}}}} 5170:
One variant replaces the desire to pick the best with the desire to pick the second-best.
8: 8030: 7986: 7570:"A Unified Approach to a Class of Best Choice Problems with an Unknown Number of Options" 7033: 6598: 6151: 5909: 5171: 3257: 2862: 2037: 1140: 229: 201: 131: 118: 54: 8057: 7160: 6402:
representation encode threshold crossings that trigger decisions to commit to a choice.
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The model is defined as follows: An applicant must be selected on some time interval
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The applicants, if all seen together, can be ranked from best to worst unambiguously.
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Vanderbei, R. J. (November 1980). "The Optimal Choice of a Subset of a Population".
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Rose, John S. (1982). "Selection of nonextremal candidates from a random sequence".
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nodes of one side arrive online in random order. Thus, it is a special case of the
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Since the applicant's values are i.i.d. draws from a uniform distribution on , the
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model based on an arrival time distribution F is more tractable for applications.
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Although there are many variations, the basic problem can be stated as follows:
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Freeman, P.R. (1983). "The secretary problem and its extensions: A review".
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Gilbert, J; Mosteller, F (1966). "Recognizing the Maximum of a Sequence".
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Szajowski, Krzysztof (1982). "Optimal choice of an object with ath rank".
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Graphs of probabilities of getting the best candidate (red circles) from
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The mating mind: how sexual choice shaped the evolution of human nature
7718: 7635: 7395:. Lecture Notes in Computer Science. Vol. 8125. pp. 589–600. 6968: 2027:, 1989), it's claimed the secretary problem first appeared in print in 58: 7616:
International Statistical Review / Revue Internationale de Statistique
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non-candidates (i.e., applicants with relative rank > 1).
1895:(ii) is a minimax-optimal strategy for the selector who does not know 8035: 7447: 6439: 1645:
denote the corresponding arrival time distribution function, that is
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which is better than all preceding ones. Then this strategy, called
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Consider the strategy to wait and observe all applicants up to time
8025: 4165:{\displaystyle E_{t}=E\left(X_{t}|I_{t}=1\right)={\frac {t}{t+1}}.} 4064:{\displaystyle x_{t}=\max \left\{x_{1},x_{2},\ldots ,x_{t}\right\}} 7848: 5295:{\displaystyle r=\left\lfloor {\frac {n}{ke^{1/k}}}\right\rfloor } 8017: 5996:{\displaystyle e^{-1}+e^{-{\frac {3}{2}}},(n\rightarrow \infty )} 3292:. Concretely, Bob can play this strategy: sample a random number 3281: 2885:, and Alice is to pick both numbers from the normal distribution 1124:
increases, and the best applicant is selected with probability 1/
1062:{\displaystyle P(x)=x\int _{x}^{1}{\frac {1}{t}}\,dt=-x\ln(x)\;.} 128:. It implies that the optimal win probability is always at least 7809:. Studies in Cognitive Systems. Vol. 27. pp. 179–211. 6774:
Cover, Thomas M. (1987), Cover, Thomas M.; Gopinath, B. (eds.),
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unconditionally, then accept the next candidate who is better".
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Alice, the informed player, writes secretly distinct numbers on
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and then to select, if possible, the first candidate after time
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Does there exist an exchangeable sequence of random variables
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into its relative rank (breaking ties randomly). For example,
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applicants, the expected payoff for some arbitrary threshold
8261:# Define a function to print the results as a Markdown table 8105:# Define the function for which you want to find the maximum 7390: 7348: 7094: 5241:
In general, the optimal decision method starts by observing
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The shortest rigorous proof known so far is provided by the
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The secretary problem was apparently introduced in 1949 by
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Roitman, Jamie D.; Shadlen, Michael N. (1 November 2002).
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is just the uniform distribution over all permutations on
8195:# Define a function to solve the problem for a specific n 2599:. Now, since the only exchangeable random permutation on 2095:
The difference with the basic secretary problem are two:
358:, the probability that the best applicant is selected is 7793:, Vol. 97, 126-133 (2009). (For French translation, see 7114: 7112: 7082: 6916:"Dynamic programming of some sequential sampling design" 4283:.) This follows from the fact that given a problem with 7920: 7044:. Annales Societatis Mathematicae Polonae, Series III. 7002:. Annales Societatis Mathematicae Polonae, Series III. 5322:
candidates until we run out of candidates or picks. If
5484: 5165: 4928:, the optimal integer-valued threshold must be either 4827:{\displaystyle \partial ^{\,2}V/\partial c^{\,2}<0} 919: − 1 applicants that were rejected. Letting 16:
Mathematical problem involving optimal stopping theory
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2009 Canadian Conference on Computer and Robot Vision
7486: 7109: 6530: 6503: 6478: 6322:{\displaystyle p_{5}=e^{-{\frac {4162637}{1474560}}}} 6285: 6180: 6154: 6088: 6029: 6009: 5938: 5912: 5877: 5824: 5798: 5768: 5748: 5728: 5708: 5688: 5668: 5648: 5586: 5515: 5495: 5444: 5410: 5374: 5348: 5328: 5308: 5247: 5233: 5180: 5115: 5095: 5075: 5055: 5035: 5015: 4994: 4964: 4934: 4914: 4880: 4860: 4840: 4784: 4680: 4637: 4344: 4309: 4289: 4265: 4235: 4205: 4181: 4080: 3992: 3933: 3872:
The cutoff rule (CR): Do not accept any of the first
3826: 3789: 3749: 3723: 3624: 3600: 3501: 3405: 3378: 3351: 3318: 3298: 3260: 3095: 3075: 3019: 2972: 2949: 2926: 2891: 2865: 2705: 2655: 2605: 2555: 2513: 2475: 2437: 2372: 2307: 2283: 2215: 2195: 2124: 2071: 1997: 1977: 1957: 1934: 1901: 1876: 1842: 1822: 1776: 1756: 1719: 1654: 1631: 1599: 1579: 1558: 1526: 1490: 1425: 1405: 1385: 1327: 1272: 1219: 1166: 1086: 980: 929: 367: 260: 232: 204: 172: 134: 98: 7923:
Organizational Behavior and Human Decision Processes
7645:
New Mathematical Diversions from Scientific American
7372: 6551: 3495:, Bob wins with probability 1/2, but conditional on 2023:
In the article "Who solved the Secretary problem?" (
53:
theory that is studied extensively in the fields of
7872: 3861:
Expected success probabilities for three heuristics
3284:strategy, which is closely related to a paradox of 2549:Alice played an exchangeable random permutation on 907:. This sum is obtained by noting that if applicant 7941: 7143:Shadlen, M. N.; Newsome, W. T. (23 January 1996). 6822: 6755: 6536: 6509: 6484: 6321: 6265: 6166: 6137: 6074: 6015: 5995: 5924: 5890: 5863: 5810: 5781: 5754: 5734: 5714: 5694: 5674: 5654: 5632:{\displaystyle a_{1}>a_{2}>\cdots >a_{r}} 5631: 5572: 5501: 5473: 5430: 5392: 5360: 5334: 5314: 5294: 5222: 5137: 5101: 5081: 5061: 5041: 5021: 5000: 4980: 4950: 4920: 4896: 4866: 4846: 4826: 4758: 4659: 4620: 4327: 4295: 4275: 4251: 4221: 4187: 4164: 4063: 3939: 3865: 3838: 3809: 3775: 3735: 3706: 3606: 3583: 3487: 3391: 3364: 3337: 3304: 3272: 3237: 3081: 3057: 2998: 2958: 2935: 2912: 2877: 2847: 2691: 2641: 2591: 2537: 2499: 2461: 2423: 2358: 2289: 2266: 2201: 2175: 2077: 2003: 1983: 1963: 1940: 1907: 1882: 1848: 1828: 1808: 1762: 1738: 1705: 1637: 1617: 1585: 1564: 1544: 1496: 1471: 1411: 1391: 1347: 1278: 1225: 1172: 1147:and probability of selecting the best alternative 1092: 1061: 935: 884: 266: 246: 218: 189: 148: 104: 7360: 7336: 7294:Costa, V. D.; Averbeck, B. B. (18 October 2013). 6920:Journal of Mathematical Analysis and Applications 6810: 6743: 8424: 7807:Conceptual Challenges in Evolutionary Psychology 7696: 7103: 6103: 4006: 3669: 3634: 3546: 3511: 3450: 3415: 3157: 3119: 2767: 2729: 7891: 7699:Journal of the American Statistical Association 7149:Proceedings of the National Academy of Sciences 6841:Jones, Maxwell; Nene, Advait (20 August 2024). 6467: 5368:, then the probability of success converges to 3783:such that Bob's winning probability is at most 3743:, Alice can construct an exchangeable sequence 7201: 7142: 7038:"The postdoc variant of the secretary problem" 6780:Open Problems in Communication and Computation 971:, the sum can be approximated by the integral 338:. Under it, the interviewer rejects the first 329: 293:applicants for the position, and the value of 8372:# Convert the DataFrame to Markdown and print 7613: 7293: 6895:Moser, Leo (1956). "On a problem of Cayley". 6856:Palley, Asa B.; Kremer, Mirko (8 July 2014). 5049:secretaries has a fixed, distinct value from 2301:iff it depends on only the relative ranks of 2061:with two antagonistic players. In this game: 915: − 1 applicants is among the first 7991:The postdoc variant of the secretary problem 7804: 7651: 7088: 6855: 4975: 4965: 4945: 4935: 4246: 4236: 4216: 4206: 2686: 2656: 2636: 2606: 2586: 2556: 7759:Stochastic Processes and Their Applications 6544:less than an optimal (offline) assignment. 6422:, with copies to a dozen friends including 5223:{\displaystyle {\frac {0.25n^{2}}{n(n-1)}}} 4951:{\displaystyle \lfloor {\sqrt {n}}\rfloor } 4222:{\displaystyle \lfloor {\sqrt {n}}\rfloor } 6948: 6629: 6627: 6625: 6623: 6023:, the probability of winning converges to 5932:, the probability of winning converges to 3918: 3009:So the fully formal statement is as below: 1055: 8001: 7985: 7962: 7847: 7831: 7743: 7661: 7585: 7558: 7528: 7461: 7319: 7227: 7178: 7168: 7118: 7032: 6997: 6931: 6913: 6840: 6651: 6276: 6075:{\displaystyle p_{1}+p_{2}+\cdots +p_{r}} 5901: 5401: 4981:{\displaystyle \lceil {\sqrt {n}}\rceil } 4812: 4790: 4741: 4717: 4252:{\displaystyle \lceil {\sqrt {n}}\rceil } 1720: 1507: 1024: 342: − 1 applicants (let applicant 8044: 7944:European Journal of Operational Research 7378: 7145:"Motion perception: seeing and deciding" 6633: 6433:The first publication was apparently by 6003:. More generally, for positive integers 4768: 3927:To model this problem, suppose that the 3856: 3849: 2053:Ferguson pointed out that the secretary 1706:{\displaystyle F(t)=\int _{0}^{t}f(s)ds} 334:The optimal policy for the problem is a 20: 7642: 7426: 7354: 7026: 6828: 6782:, New York, NY: Springer, p. 152, 6761: 6723: 6660: 6620: 6332: 6279:gave a general algorithm. For example, 5573:{\displaystyle (a_{1},a_{2},...,a_{r})} 3947:applicants have "true" values that are 3888:Candidate count rule (CCR): Select the 1358: 8425: 7752: 7725: 6991: 6816: 6749: 5157: 3903:Each heuristic has a single parameter 2545:with equal probability. This makes it 1890:a success probability of at least 1/e, 1472:{\displaystyle P(N=k)_{k=1,2,\cdots }} 8458:Mathematical optimization in business 8047:"Optimal Search (Secretary Problems)" 8026: 7594: 7567: 7537: 7507: 7366: 7342: 6894: 6843:"Secretary Problem Variant Deep Dive" 6773: 6362:While there is a substantial body of 5864:{\displaystyle a_{i}\sim ne^{-k_{i}}} 5489:In this variant, a player is allowed 5438:, then the probability of success is 2424:{\displaystyle X_{1},X_{2},...,X_{n}} 2359:{\displaystyle X_{1},X_{2},...,X_{n}} 2267:{\displaystyle X_{1},X_{2},...,X_{n}} 2176:{\displaystyle X_{1},X_{2},...,X_{n}} 2117:exchangeable random variable sequence 2110: 2018: 1112:. Thus, the optimal cutoff tends to 8402:# Print the table for n from 1 to 10 6954: 6666: 6357: 5811:{\displaystyle n\rightarrow \infty } 5662:letters of acceptance labelled from 5642:Specifically, imagine that you have 4259:. (In fact, whichever is closest to 2186:Bob's strategy is formalizable as a 85:. Its solution is also known as the 6636:"Who Solved the Secretary Problem?" 6634:Ferguson, Thomas S. (August 1989). 5485:Pick the best, using multiple tries 5166:Pick the second-best, using one try 1100:, setting it to 0, and solving for 286:There is a single position to fill. 13: 7966:Mathematics of Operations Research 7835:Mathematics of Operations Research 7728:"A solution to the game of Googol" 7450:Journal of Mathematical Psychology 7429:Journal of Mathematical Psychology 7220:10.1523/JNEUROSCI.22-21-09475.2002 6113: 5987: 5805: 5474:{\displaystyle {\frac {1}{n/2+1}}} 5355: 5234:Pick the top-k ones, using k tries 4804: 4786: 4692: 4684: 1155:are shown in the following table. 346:be the best applicant among these 49:demonstrates a scenario involving 14: 8469: 8059:Optimal Stopping and Applications 8011: 7894:The American Mathematical Monthly 6914:Sakaguchi, Minoru (1 June 1961). 1139:can also be obtained by standard 7568:Bruss, F. Thomas (August 1984). 6724:Thomson, Jonny (21 April 2022). 6670:(2009). "Knowing When to Stop". 6568: 6554: 5029:. Interestingly, if each of the 3866:Stein, Seale & Rapoport 2003 3618:random distribution, as long as 3591:, Bob wins with probability 1. 3006:that are positively correlated. 1860:, has the following properties: 1348:{\displaystyle 1/e\approx 0.368} 1143:methods. The optimal thresholds 7384: 7287: 7244: 7195: 7136: 7124: 6907: 6888: 6849: 6834: 5393:{\displaystyle {\frac {1}{ek}}} 5138:{\displaystyle c={\sqrt {n}}-1} 3058:{\displaystyle X_{1},...,X_{n}} 2462:{\displaystyle 0.2,0.3,0.3,0.1} 2299:relative rank stopping strategy 1924:The 1/e-law, proved in 1984 by 1739:{\displaystyle \,0\leq t\leq T} 8072: 7513:"Sum the odds to one and stop" 6767: 6717: 6449:-law of best choice is due to 6352:behavioral operations research 6110: 5990: 5984: 5978: 5802: 5567: 5516: 5352: 5214: 5202: 4834:for all permissible values of 4654: 4648: 4361: 4355: 4113: 3736:{\displaystyle \epsilon >0} 3701: 3698: 3672: 3663: 3637: 3631: 3578: 3575: 3549: 3540: 3514: 3508: 3482: 3479: 3453: 3444: 3418: 3412: 3150: 3102: 2907: 2895: 2760: 2712: 2101:joint probability distribution 1786: 1780: 1694: 1688: 1664: 1658: 1612: 1600: 1539: 1527: 1442: 1429: 1419:with a known distribution of 1370: 1052: 1046: 990: 984: 507: 381: 375: 277: 1: 7956:10.1016/S0377-2217(02)00601-X 7643:Gardner, Martin (1966). "3". 7420: 7074:: CS1 maint: date and year ( 4897:{\displaystyle c={\sqrt {n}}} 4328:{\displaystyle 1\leq c\leq n} 3810:{\displaystyle 1/2+\epsilon } 2692:{\displaystyle \{1,2,...,n\}} 2642:{\displaystyle \{1,2,...,n\}} 2592:{\displaystyle \{1,2,...,n\}} 1809:{\displaystyle F(\tau )=1/e.} 8279:# Prepare data for the table 7873:Miller, Geoffrey F. (2001). 7401:10.1007/978-3-642-40450-4_50 7104:Gilbert & Mosteller 1966 6933:10.1016/0022-247X(61)90023-3 6788:10.1007/978-1-4612-4808-8_43 6706:For French translation, see 6468:Combinatorial generalization 5361:{\displaystyle n\to \infty } 3594:Note that the random number 2277:We say that a stopping rule 7: 7815:10.1007/978-94-010-0618-7_7 7253:Nature Reviews Neuroscience 7208:The Journal of Neuroscience 6547: 5871:, for some rational number 4988:. Thus, for most values of 4276:{\displaystyle {\sqrt {n}}} 3776:{\displaystyle X_{1},X_{2}} 3249: 2999:{\displaystyle X_{1},X_{2}} 1104:, we find that the optimal 895:The sum is not defined for 644:the best of the first  330:Deriving the optimal policy 10: 8474: 8066: 8062:book by Thomas S. Ferguson 6405: 3488:{\displaystyle Y\not \in } 3338:{\displaystyle X_{1}>Y} 923:tend to infinity, writing 65:. It is also known as the 7771:10.1016/j.spa.2021.12.008 7574:The Annals of Probability 7547:The Annals of Probability 7517:The Annals of Probability 7472:10.1016/j.jmp.2005.08.002 7441:10.1016/j.jmp.2005.11.003 6776:"Pick the Largest Number" 6519:online bipartite matching 3714:has nonzero probability. 2033:Mathematical Games column 1072:Taking the derivative of 8078: 8031:"Sultan's Dowry Problem" 7605:: CS1 maint: location ( 7089:Girdhar & Dudek 2009 6614: 4660:{\displaystyle V_{n}(c)} 3986:th applicant given that 2057:remained unsolved, as a 190:{\displaystyle \sim n/e} 8443:Matching (graph theory) 7132:Palley and Kremer, 2014 7012:10.14708/ma.v10i19.1533 6609:Stable marriage problem 6384:dorsolateral prefrontal 6376:Markov decision process 5342:is held constant while 3919:Cardinal payoff variant 2538:{\displaystyle 2,4,3,1} 2500:{\displaystyle 2,3,4,1} 1552:from an unknown number 254:for moderate values of 7935:10.1006/obhd.1997.2683 7858:10.1287/moor.2015.0748 7745:10.1214/aop/1176988613 7587:10.1214/aop/1176993237 7560:10.1214/aop/1068646368 7530:10.1214/aop/1019160340 7501:10.1287/mnsc.1060.0535 7054:10.14708/ma.v49i1.7076 7042:Mathematica Applicanda 6874:10.1287/mnsc.2014.1902 6538: 6511: 6486: 6323: 6267: 6168: 6139: 6076: 6017: 5997: 5926: 5902:Probability of winning 5892: 5865: 5812: 5783: 5756: 5736: 5716: 5696: 5676: 5656: 5633: 5574: 5503: 5475: 5432: 5394: 5362: 5336: 5316: 5296: 5224: 5139: 5103: 5083: 5063: 5043: 5023: 5002: 4982: 4952: 4922: 4898: 4868: 4848: 4828: 4775: 4760: 4661: 4622: 4517: 4425: 4393: 4329: 4297: 4277: 4253: 4223: 4189: 4166: 4065: 3941: 3862: 3840: 3839:{\displaystyle n>2} 3811: 3777: 3737: 3708: 3608: 3585: 3489: 3393: 3366: 3339: 3306: 3274: 3247: 3239: 3216: 3083: 3059: 3000: 2960: 2937: 2914: 2913:{\displaystyle N(0,1)} 2879: 2849: 2826: 2693: 2643: 2593: 2539: 2501: 2463: 2425: 2360: 2291: 2268: 2203: 2177: 2079: 2051: 2005: 1985: 1965: 1942: 1909: 1884: 1850: 1830: 1810: 1764: 1740: 1707: 1639: 1619: 1587: 1566: 1546: 1508:1/e-law of best choice 1498: 1473: 1413: 1393: 1349: 1280: 1227: 1174: 1151:for several values of 1094: 1063: 937: 886: 856: 763: 626: 599: 484: 411: 268: 248: 220: 191: 150: 106: 71:sultan's dowry problem 42: 7797:in the July issue of 7732:Annals of Probability 7647:. Simon and Schuster. 7393:Algorithms – ESA 2013 7312:10.1093/cercor/bht286 7170:10.1073/pnas.93.2.628 7119:Matsui & Ano 2016 6957:J. Optim. Theory Appl 6710:in the July issue of 6653:10.1214/ss/1177012493 6539: 6512: 6487: 6386:cortices, as well as 6324: 6277:Matsui & Ano 2016 6268: 6169: 6140: 6077: 6018: 5998: 5927: 5893: 5891:{\displaystyle k_{i}} 5866: 5813: 5784: 5782:{\displaystyle a_{i}} 5757: 5737: 5717: 5697: 5677: 5657: 5634: 5575: 5504: 5476: 5433: 5431:{\displaystyle k=n/2} 5395: 5363: 5337: 5317: 5297: 5225: 5140: 5104: 5084: 5064: 5044: 5024: 5003: 4983: 4953: 4923: 4899: 4869: 4849: 4829: 4772: 4761: 4662: 4623: 4491: 4399: 4367: 4330: 4298: 4278: 4254: 4224: 4190: 4167: 4066: 3942: 3860: 3850:Heuristic performance 3841: 3812: 3778: 3738: 3709: 3707:{\displaystyle Y\in } 3609: 3586: 3584:{\displaystyle Y\in } 3490: 3394: 3392:{\displaystyle X_{2}} 3367: 3365:{\displaystyle X_{1}} 3340: 3307: 3290:two envelopes paradox 3275: 3240: 3196: 3084: 3082:{\displaystyle \tau } 3060: 3011: 3001: 2961: 2938: 2915: 2880: 2850: 2806: 2694: 2644: 2594: 2540: 2502: 2464: 2426: 2361: 2292: 2290:{\displaystyle \tau } 2269: 2204: 2202:{\displaystyle \tau } 2178: 2080: 2043: 2006: 2004:{\displaystyle \tau } 1986: 1984:{\displaystyle \tau } 1966: 1943: 1910: 1885: 1851: 1849:{\displaystyle \tau } 1831: 1829:{\displaystyle \tau } 1811: 1765: 1763:{\displaystyle \tau } 1741: 1708: 1640: 1620: 1588: 1567: 1547: 1499: 1474: 1414: 1394: 1350: 1281: 1228: 1175: 1095: 1064: 938: 887: 836: 743: 667:is in the first  606: 573: 464: 391: 269: 249: 221: 192: 151: 107: 37:(blue crosses) where 24: 8453:Probability problems 7987:Vanderbei, Robert J. 7979:10.1287/moor.5.4.481 7787:Knowing When to Stop 7656:. pp. 292–298. 7034:Vanderbei, Robert J. 7000:Matematyka Stosowana 6528: 6501: 6476: 6460:in 1875 and even by 6333:Experimental studies 6283: 6178: 6152: 6086: 6027: 6007: 5936: 5910: 5875: 5822: 5796: 5766: 5746: 5726: 5706: 5686: 5666: 5646: 5584: 5513: 5493: 5442: 5408: 5372: 5346: 5326: 5306: 5245: 5178: 5113: 5093: 5073: 5053: 5033: 5013: 4992: 4962: 4932: 4912: 4878: 4858: 4838: 4782: 4678: 4635: 4342: 4307: 4287: 4263: 4233: 4203: 4179: 4078: 3990: 3960:uniform distribution 3931: 3824: 3787: 3747: 3721: 3622: 3614:can be sampled from 3598: 3499: 3403: 3376: 3349: 3316: 3296: 3258: 3093: 3073: 3017: 2970: 2947: 2924: 2889: 2863: 2703: 2653: 2603: 2553: 2511: 2473: 2435: 2370: 2305: 2281: 2213: 2193: 2122: 2069: 1995: 1975: 1955: 1932: 1899: 1874: 1840: 1820: 1774: 1754: 1717: 1652: 1629: 1597: 1577: 1556: 1524: 1488: 1423: 1403: 1383: 1359:Alternative solution 1325: 1270: 1217: 1164: 1131:For small values of 1084: 978: 927: 365: 258: 230: 202: 170: 132: 96: 75:fussy suitor problem 7753:Gnedin, A. (2021). 7726:Gnedin, A. (1994). 7672:10.1109/CRV.2009.30 7161:1996PNAS...93..628S 6686:10.1511/2009.77.126 6640:Statistical Science 6167:{\displaystyle r=4} 5925:{\displaystyle r=2} 5172:Robert J. Vanderbei 5158:Other modifications 3273:{\displaystyle n=2} 2878:{\displaystyle n=2} 2038:Scientific American 1870:(i) yields for all 1684: 1141:dynamic programming 1013: 247:{\displaystyle 1/e} 219:{\displaystyle 1/e} 162:is the base of the 149:{\displaystyle 1/e} 119:selection algorithm 83:best choice problem 55:applied probability 8438:Sequential methods 8053:on 4 January 2017. 8028:Weisstein, Eric W. 7791:American Scientist 7601:cite press release 7489:Management Science 6969:10.1007/BF00934083 6862:Management Science 6673:American Scientist 6584:Assignment problem 6576:Mathematics portal 6534: 6507: 6482: 6396:anterior cingulate 6319: 6263: 6164: 6135: 6117: 6072: 6013: 5993: 5922: 5888: 5861: 5808: 5779: 5752: 5732: 5712: 5692: 5672: 5652: 5629: 5570: 5499: 5471: 5428: 5390: 5358: 5332: 5312: 5292: 5220: 5135: 5099: 5079: 5059: 5039: 5019: 4998: 4978: 4948: 4918: 4894: 4864: 4844: 4824: 4776: 4756: 4657: 4618: 4325: 4293: 4273: 4249: 4219: 4185: 4162: 4061: 3937: 3911:for problems with 3863: 3836: 3807: 3773: 3733: 3704: 3604: 3581: 3485: 3389: 3362: 3335: 3302: 3270: 3235: 3177: 3139: 3079: 3055: 2996: 2959:{\displaystyle +3} 2956: 2936:{\displaystyle -3} 2933: 2910: 2875: 2845: 2787: 2749: 2689: 2639: 2589: 2535: 2497: 2459: 2421: 2356: 2287: 2264: 2199: 2173: 2111:Strategic analysis 2075: 2019:The game of googol 2001: 1981: 1961: 1938: 1905: 1880: 1846: 1826: 1806: 1760: 1736: 1703: 1670: 1635: 1615: 1583: 1562: 1542: 1494: 1469: 1409: 1389: 1345: 1276: 1223: 1170: 1090: 1080:) with respect to 1059: 999: 933: 882: 880: 686: 264: 244: 216: 187: 146: 102: 43: 41:is the sample size 29:applications, and 8448:Optimal decisions 7884:978-0-385-49517-2 7824:978-94-010-3890-4 7681:978-1-4244-4211-9 7410:978-3-642-40449-8 7214:(21): 9475–9489. 6868:(10): 2525–2542. 6797:978-1-4612-4808-8 6668:Hill, Theodore P. 6537:{\displaystyle e} 6510:{\displaystyle n} 6485:{\displaystyle n} 6358:Neural correlates 6347:decision behavior 6345:have studied the 6315: 6259: 6236: 6213: 6133: 6102: 6016:{\displaystyle r} 5971: 5755:{\displaystyle 1} 5735:{\displaystyle i} 5715:{\displaystyle r} 5702:. You would have 5695:{\displaystyle r} 5675:{\displaystyle 1} 5655:{\displaystyle r} 5502:{\displaystyle r} 5469: 5388: 5335:{\displaystyle k} 5315:{\displaystyle r} 5286: 5218: 5127: 5102:{\displaystyle V} 5082:{\displaystyle n} 5062:{\displaystyle 1} 5042:{\displaystyle n} 5022:{\displaystyle n} 5001:{\displaystyle n} 4973: 4943: 4921:{\displaystyle c} 4892: 4867:{\displaystyle V} 4847:{\displaystyle c} 4751: 4699: 4613: 4557: 4538: 4477: 4446: 4296:{\displaystyle n} 4271: 4244: 4214: 4188:{\displaystyle c} 4157: 3940:{\displaystyle n} 3915: = 80. 3717:However, for any 3607:{\displaystyle Y} 3305:{\displaystyle Y} 3233: 3194: 3156: 3118: 2843: 2804: 2766: 2728: 2209:for the sequence 2078:{\displaystyle n} 2031:'s February 1960 1964:{\displaystyle N} 1941:{\displaystyle N} 1908:{\displaystyle N} 1883:{\displaystyle N} 1638:{\displaystyle F} 1586:{\displaystyle f} 1565:{\displaystyle N} 1497:{\displaystyle N} 1412:{\displaystyle N} 1392:{\displaystyle n} 1319: 1318: 1279:{\displaystyle P} 1226:{\displaystyle r} 1173:{\displaystyle n} 1093:{\displaystyle x} 1022: 936:{\displaystyle x} 873: 834: 806: 788: 726: 703: 702: is the best 695: 682: 668: 659: 645: 551: 550: is the best 543: 522: 521: is the best 514: 504: 503: is selected 496: 447: 446: is the best 439: 431: 430: is selected 423: 267:{\displaystyle n} 164:natural logarithm 105:{\displaystyle n} 47:secretary problem 8465: 8418: 8415: 8412: 8409: 8406: 8403: 8400: 8397: 8394: 8391: 8388: 8385: 8382: 8379: 8376: 8373: 8370: 8367: 8364: 8361: 8358: 8355: 8352: 8349: 8346: 8343: 8340: 8337: 8334: 8331: 8328: 8325: 8322: 8319: 8316: 8313: 8310: 8307: 8304: 8301: 8298: 8295: 8292: 8289: 8286: 8283: 8280: 8277: 8274: 8271: 8268: 8265: 8262: 8259: 8256: 8253: 8250: 8247: 8244: 8241: 8238: 8235: 8232: 8229: 8226: 8223: 8220: 8217: 8214: 8211: 8208: 8205: 8202: 8199: 8196: 8193: 8190: 8187: 8184: 8181: 8178: 8175: 8172: 8169: 8166: 8163: 8160: 8157: 8154: 8151: 8148: 8145: 8142: 8139: 8136: 8133: 8130: 8127: 8124: 8121: 8118: 8115: 8112: 8109: 8106: 8103: 8100: 8097: 8094: 8091: 8088: 8085: 8082: 8076: 8054: 8049:. Archived from 8041: 8040: 8019: 8007: 8005: 7995: 7982: 7959: 7938: 7917: 7888: 7877:. Anchor Books. 7869: 7851: 7828: 7782: 7749: 7747: 7738:(3): 1588–1595. 7722: 7693: 7665: 7648: 7639: 7610: 7604: 7596: 7591: 7589: 7564: 7562: 7553:(4): 1859–1961. 7541:(October 2003). 7539:Bruss, F. Thomas 7534: 7532: 7523:(3): 1384–1391. 7509:Bruss, F. Thomas 7504: 7495:(9): 1437–1449. 7483: 7465: 7444: 7415: 7414: 7388: 7382: 7376: 7370: 7364: 7358: 7352: 7346: 7340: 7334: 7333: 7323: 7291: 7285: 7284: 7248: 7242: 7241: 7231: 7199: 7193: 7192: 7182: 7172: 7140: 7134: 7128: 7122: 7116: 7107: 7101: 7092: 7086: 7080: 7079: 7073: 7065: 7036:(21 June 2021). 7030: 7024: 7023: 6995: 6989: 6988: 6952: 6946: 6945: 6935: 6911: 6905: 6904: 6892: 6886: 6885: 6853: 6847: 6846: 6838: 6832: 6826: 6820: 6814: 6808: 6807: 6806: 6804: 6771: 6765: 6759: 6753: 6747: 6741: 6740: 6738: 6736: 6721: 6715: 6705: 6664: 6658: 6657: 6655: 6631: 6599:Robbins' problem 6594:Optimal stopping 6578: 6573: 6572: 6564: 6562:Economics portal 6559: 6558: 6543: 6541: 6540: 6535: 6516: 6514: 6513: 6508: 6491: 6489: 6488: 6483: 6412:Merrill M. Flood 6388:ventral striatum 6328: 6326: 6325: 6320: 6318: 6317: 6316: 6308: 6295: 6294: 6272: 6270: 6269: 6264: 6262: 6261: 6260: 6252: 6239: 6238: 6237: 6229: 6216: 6215: 6214: 6206: 6193: 6192: 6173: 6171: 6170: 6165: 6144: 6142: 6141: 6136: 6134: 6129: 6128: 6119: 6116: 6098: 6097: 6081: 6079: 6078: 6073: 6071: 6070: 6052: 6051: 6039: 6038: 6022: 6020: 6019: 6014: 6002: 6000: 5999: 5994: 5974: 5973: 5972: 5964: 5951: 5950: 5931: 5929: 5928: 5923: 5897: 5895: 5894: 5889: 5887: 5886: 5870: 5868: 5867: 5862: 5860: 5859: 5858: 5857: 5834: 5833: 5817: 5815: 5814: 5809: 5788: 5786: 5785: 5780: 5778: 5777: 5761: 5759: 5758: 5753: 5741: 5739: 5738: 5733: 5721: 5719: 5718: 5713: 5701: 5699: 5698: 5693: 5681: 5679: 5678: 5673: 5661: 5659: 5658: 5653: 5638: 5636: 5635: 5630: 5628: 5627: 5609: 5608: 5596: 5595: 5579: 5577: 5576: 5571: 5566: 5565: 5541: 5540: 5528: 5527: 5508: 5506: 5505: 5500: 5480: 5478: 5477: 5472: 5470: 5468: 5458: 5446: 5437: 5435: 5434: 5429: 5424: 5399: 5397: 5396: 5391: 5389: 5387: 5376: 5367: 5365: 5364: 5359: 5341: 5339: 5338: 5333: 5321: 5319: 5318: 5313: 5301: 5299: 5298: 5293: 5291: 5287: 5285: 5284: 5283: 5279: 5259: 5229: 5227: 5226: 5221: 5219: 5217: 5197: 5196: 5195: 5182: 5144: 5142: 5141: 5136: 5128: 5123: 5109:is maximized at 5108: 5106: 5105: 5100: 5088: 5086: 5085: 5080: 5068: 5066: 5065: 5060: 5048: 5046: 5045: 5040: 5028: 5026: 5025: 5020: 5007: 5005: 5004: 4999: 4987: 4985: 4984: 4979: 4974: 4969: 4957: 4955: 4954: 4949: 4944: 4939: 4927: 4925: 4924: 4919: 4903: 4901: 4900: 4895: 4893: 4888: 4874:is maximized at 4873: 4871: 4870: 4865: 4853: 4851: 4850: 4845: 4833: 4831: 4830: 4825: 4817: 4816: 4803: 4795: 4794: 4765: 4763: 4762: 4757: 4752: 4750: 4746: 4745: 4739: 4729: 4722: 4721: 4715: 4705: 4700: 4698: 4690: 4682: 4667:with respect to 4666: 4664: 4663: 4658: 4647: 4646: 4631:Differentiating 4627: 4625: 4624: 4619: 4614: 4612: 4601: 4588: 4587: 4582: 4563: 4558: 4550: 4548: 4544: 4543: 4539: 4534: 4523: 4516: 4505: 4482: 4478: 4476: 4462: 4456: 4452: 4451: 4447: 4442: 4431: 4424: 4413: 4392: 4381: 4354: 4353: 4334: 4332: 4331: 4326: 4302: 4300: 4299: 4294: 4282: 4280: 4279: 4274: 4272: 4267: 4258: 4256: 4255: 4250: 4245: 4240: 4228: 4226: 4225: 4220: 4215: 4210: 4194: 4192: 4191: 4186: 4171: 4169: 4168: 4163: 4158: 4156: 4142: 4137: 4133: 4126: 4125: 4116: 4111: 4110: 4090: 4089: 4070: 4068: 4067: 4062: 4060: 4056: 4055: 4054: 4036: 4035: 4023: 4022: 4002: 4001: 3949:random variables 3946: 3944: 3943: 3938: 3845: 3843: 3842: 3837: 3816: 3814: 3813: 3808: 3797: 3782: 3780: 3779: 3774: 3772: 3771: 3759: 3758: 3742: 3740: 3739: 3734: 3713: 3711: 3710: 3705: 3697: 3696: 3684: 3683: 3662: 3661: 3649: 3648: 3613: 3611: 3610: 3605: 3590: 3588: 3587: 3582: 3574: 3573: 3561: 3560: 3539: 3538: 3526: 3525: 3494: 3492: 3491: 3486: 3478: 3477: 3465: 3464: 3443: 3442: 3430: 3429: 3398: 3396: 3395: 3390: 3388: 3387: 3371: 3369: 3368: 3363: 3361: 3360: 3344: 3342: 3341: 3336: 3328: 3327: 3311: 3309: 3308: 3303: 3279: 3277: 3276: 3271: 3244: 3242: 3241: 3236: 3234: 3232: 3218: 3215: 3210: 3195: 3190: 3179: 3176: 3149: 3148: 3138: 3114: 3113: 3088: 3086: 3085: 3080: 3065:, such that for 3064: 3062: 3061: 3056: 3054: 3053: 3029: 3028: 3005: 3003: 3002: 2997: 2995: 2994: 2982: 2981: 2965: 2963: 2962: 2957: 2942: 2940: 2939: 2934: 2919: 2917: 2916: 2911: 2884: 2882: 2881: 2876: 2854: 2852: 2851: 2846: 2844: 2842: 2828: 2825: 2820: 2805: 2800: 2789: 2786: 2759: 2758: 2748: 2724: 2723: 2698: 2696: 2695: 2690: 2648: 2646: 2645: 2640: 2598: 2596: 2595: 2590: 2544: 2542: 2541: 2536: 2506: 2504: 2503: 2498: 2468: 2466: 2465: 2460: 2430: 2428: 2427: 2422: 2420: 2419: 2395: 2394: 2382: 2381: 2365: 2363: 2362: 2357: 2355: 2354: 2330: 2329: 2317: 2316: 2296: 2294: 2293: 2288: 2273: 2271: 2270: 2265: 2263: 2262: 2238: 2237: 2225: 2224: 2208: 2206: 2205: 2200: 2182: 2180: 2179: 2174: 2172: 2171: 2147: 2146: 2134: 2133: 2084: 2082: 2081: 2076: 2010: 2008: 2007: 2002: 1990: 1988: 1987: 1982: 1970: 1968: 1967: 1962: 1947: 1945: 1944: 1939: 1914: 1912: 1911: 1906: 1889: 1887: 1886: 1881: 1855: 1853: 1852: 1847: 1835: 1833: 1832: 1827: 1815: 1813: 1812: 1807: 1799: 1769: 1767: 1766: 1761: 1745: 1743: 1742: 1737: 1712: 1710: 1709: 1704: 1683: 1678: 1644: 1642: 1641: 1636: 1624: 1622: 1621: 1618:{\displaystyle } 1616: 1592: 1590: 1589: 1584: 1571: 1569: 1568: 1563: 1551: 1549: 1548: 1545:{\displaystyle } 1543: 1515:unified approach 1503: 1501: 1500: 1495: 1478: 1476: 1475: 1470: 1468: 1467: 1418: 1416: 1415: 1410: 1398: 1396: 1395: 1390: 1354: 1352: 1351: 1346: 1335: 1285: 1283: 1282: 1277: 1232: 1230: 1229: 1224: 1179: 1177: 1176: 1171: 1158: 1157: 1099: 1097: 1096: 1091: 1068: 1066: 1065: 1060: 1023: 1015: 1012: 1007: 943:as the limit of 942: 940: 939: 934: 891: 889: 888: 883: 881: 874: 872: 858: 855: 850: 835: 830: 819: 811: 807: 799: 794: 790: 789: 787: 776: 765: 762: 757: 731: 727: 719: 714: 710: 709: 705: 704: 701: 696: 693: 691: 687: 683: 681: applicants 680: 669: 666: 660: 658: applicants 657: 646: 643: 625: 620: 598: 587: 561: 557: 553: 552: 549: 544: 541: 528: 524: 523: 520: 515: 512: 510: 505: 502: 497: 494: 483: 478: 457: 453: 449: 448: 445: 440: 437: 432: 429: 424: 421: 410: 405: 273: 271: 270: 265: 253: 251: 250: 245: 240: 225: 223: 222: 217: 212: 196: 194: 193: 188: 183: 155: 153: 152: 147: 142: 111: 109: 108: 103: 67:marriage problem 51:optimal stopping 8473: 8472: 8468: 8467: 8466: 8464: 8463: 8462: 8433:Decision theory 8423: 8422: 8421: 8417: 8416: 8413: 8410: 8407: 8404: 8401: 8398: 8395: 8392: 8389: 8386: 8383: 8380: 8377: 8374: 8371: 8368: 8365: 8362: 8359: 8356: 8353: 8350: 8347: 8344: 8341: 8338: 8335: 8332: 8329: 8326: 8323: 8320: 8317: 8314: 8311: 8308: 8305: 8302: 8299: 8296: 8293: 8290: 8287: 8284: 8281: 8278: 8275: 8272: 8269: 8266: 8263: 8260: 8257: 8254: 8251: 8248: 8245: 8242: 8239: 8236: 8233: 8230: 8227: 8224: 8221: 8218: 8215: 8212: 8209: 8206: 8203: 8200: 8197: 8194: 8191: 8188: 8185: 8182: 8179: 8176: 8173: 8170: 8167: 8164: 8161: 8158: 8155: 8152: 8149: 8146: 8143: 8140: 8137: 8134: 8131: 8128: 8125: 8122: 8119: 8116: 8113: 8110: 8107: 8104: 8101: 8098: 8095: 8092: 8089: 8086: 8083: 8080: 8077: 8073: 8069: 8014: 8003:10.1.1.366.1718 7993: 7906:10.2307/2589677 7885: 7825: 7799:Pour la Science 7711:10.2307/2283044 7682: 7628:10.2307/1402748 7598: 7597: 7463:10.1.1.497.6468 7423: 7418: 7411: 7389: 7385: 7377: 7373: 7365: 7361: 7353: 7349: 7341: 7337: 7300:Cerebral Cortex 7292: 7288: 7265:10.1038/nrn2374 7249: 7245: 7200: 7196: 7141: 7137: 7129: 7125: 7117: 7110: 7102: 7095: 7087: 7083: 7067: 7066: 7031: 7027: 6996: 6992: 6953: 6949: 6912: 6908: 6893: 6889: 6854: 6850: 6839: 6835: 6827: 6823: 6815: 6811: 6802: 6800: 6798: 6772: 6768: 6760: 6756: 6748: 6744: 6734: 6732: 6722: 6718: 6712:Pour la Science 6665: 6661: 6632: 6621: 6617: 6574: 6567: 6560: 6553: 6550: 6529: 6526: 6525: 6502: 6499: 6498: 6495:bipartite graph 6477: 6474: 6473: 6470: 6462:Johannes Kepler 6451:F. Thomas Bruss 6420:Leonard Gillman 6408: 6392:anterior insula 6360: 6335: 6307: 6303: 6299: 6290: 6286: 6284: 6281: 6280: 6251: 6247: 6243: 6228: 6224: 6220: 6205: 6201: 6197: 6185: 6181: 6179: 6176: 6175: 6153: 6150: 6149: 6148:computed up to 6124: 6120: 6118: 6106: 6093: 6089: 6087: 6084: 6083: 6066: 6062: 6047: 6043: 6034: 6030: 6028: 6025: 6024: 6008: 6005: 6004: 5963: 5959: 5955: 5943: 5939: 5937: 5934: 5933: 5911: 5908: 5907: 5904: 5882: 5878: 5876: 5873: 5872: 5853: 5849: 5845: 5841: 5829: 5825: 5823: 5820: 5819: 5797: 5794: 5793: 5773: 5769: 5767: 5764: 5763: 5747: 5744: 5743: 5727: 5724: 5723: 5707: 5704: 5703: 5687: 5684: 5683: 5667: 5664: 5663: 5647: 5644: 5643: 5623: 5619: 5604: 5600: 5591: 5587: 5585: 5582: 5581: 5561: 5557: 5536: 5532: 5523: 5519: 5514: 5511: 5510: 5494: 5491: 5490: 5487: 5454: 5450: 5445: 5443: 5440: 5439: 5420: 5409: 5406: 5405: 5380: 5375: 5373: 5370: 5369: 5347: 5344: 5343: 5327: 5324: 5323: 5307: 5304: 5303: 5275: 5271: 5267: 5263: 5258: 5254: 5246: 5243: 5242: 5236: 5198: 5191: 5187: 5183: 5181: 5179: 5176: 5175: 5168: 5160: 5122: 5114: 5111: 5110: 5094: 5091: 5090: 5074: 5071: 5070: 5054: 5051: 5050: 5034: 5031: 5030: 5014: 5011: 5010: 4993: 4990: 4989: 4968: 4963: 4960: 4959: 4938: 4933: 4930: 4929: 4913: 4910: 4909: 4887: 4879: 4876: 4875: 4859: 4856: 4855: 4854:, we find that 4839: 4836: 4835: 4811: 4807: 4799: 4789: 4785: 4783: 4780: 4779: 4740: 4735: 4734: 4730: 4716: 4711: 4710: 4706: 4704: 4691: 4683: 4681: 4679: 4676: 4675: 4642: 4638: 4636: 4633: 4632: 4602: 4583: 4578: 4577: 4564: 4562: 4549: 4524: 4522: 4518: 4506: 4495: 4490: 4486: 4466: 4461: 4457: 4432: 4430: 4426: 4414: 4403: 4398: 4394: 4382: 4371: 4349: 4345: 4343: 4340: 4339: 4308: 4305: 4304: 4288: 4285: 4284: 4266: 4264: 4261: 4260: 4239: 4234: 4231: 4230: 4209: 4204: 4201: 4200: 4180: 4177: 4176: 4146: 4141: 4121: 4117: 4112: 4106: 4102: 4101: 4097: 4085: 4081: 4079: 4076: 4075: 4050: 4046: 4031: 4027: 4018: 4014: 4013: 4009: 3997: 3993: 3991: 3988: 3987: 3932: 3929: 3928: 3921: 3852: 3825: 3822: 3821: 3793: 3788: 3785: 3784: 3767: 3763: 3754: 3750: 3748: 3745: 3744: 3722: 3719: 3718: 3692: 3688: 3679: 3675: 3657: 3653: 3644: 3640: 3623: 3620: 3619: 3599: 3596: 3595: 3569: 3565: 3556: 3552: 3534: 3530: 3521: 3517: 3500: 3497: 3496: 3473: 3469: 3460: 3456: 3438: 3434: 3425: 3421: 3404: 3401: 3400: 3383: 3379: 3377: 3374: 3373: 3356: 3352: 3350: 3347: 3346: 3323: 3319: 3317: 3314: 3313: 3297: 3294: 3293: 3259: 3256: 3255: 3252: 3222: 3217: 3211: 3200: 3180: 3178: 3160: 3144: 3140: 3122: 3109: 3105: 3094: 3091: 3090: 3074: 3071: 3070: 3049: 3045: 3024: 3020: 3018: 3015: 3014: 2990: 2986: 2977: 2973: 2971: 2968: 2967: 2948: 2945: 2944: 2925: 2922: 2921: 2890: 2887: 2886: 2864: 2861: 2860: 2832: 2827: 2821: 2810: 2790: 2788: 2770: 2754: 2750: 2732: 2719: 2715: 2704: 2701: 2700: 2654: 2651: 2650: 2604: 2601: 2600: 2554: 2551: 2550: 2512: 2509: 2508: 2474: 2471: 2470: 2436: 2433: 2432: 2415: 2411: 2390: 2386: 2377: 2373: 2371: 2368: 2367: 2350: 2346: 2325: 2321: 2312: 2308: 2306: 2303: 2302: 2282: 2279: 2278: 2258: 2254: 2233: 2229: 2220: 2216: 2214: 2211: 2210: 2194: 2191: 2190: 2167: 2163: 2142: 2138: 2129: 2125: 2123: 2120: 2119: 2113: 2070: 2067: 2066: 2021: 1996: 1993: 1992: 1976: 1973: 1972: 1956: 1953: 1952: 1933: 1930: 1929: 1926:F. Thomas Bruss 1900: 1897: 1896: 1875: 1872: 1871: 1841: 1838: 1837: 1821: 1818: 1817: 1795: 1775: 1772: 1771: 1755: 1752: 1751: 1718: 1715: 1714: 1679: 1674: 1653: 1650: 1649: 1630: 1627: 1626: 1598: 1595: 1594: 1578: 1575: 1574: 1557: 1554: 1553: 1525: 1522: 1521: 1510: 1489: 1486: 1485: 1445: 1441: 1424: 1421: 1420: 1404: 1401: 1400: 1384: 1381: 1380: 1373: 1361: 1331: 1326: 1323: 1322: 1271: 1268: 1267: 1218: 1215: 1214: 1165: 1162: 1161: 1085: 1082: 1081: 1014: 1008: 1003: 979: 976: 975: 928: 925: 924: 879: 878: 862: 857: 851: 840: 820: 818: 809: 808: 798: 777: 766: 764: 758: 747: 742: 738: 729: 728: 718: 700: 694:applicant  692: 685: 684: 679: 665: 662: 661: 656: 642: 638: 635: 634: 630: 621: 610: 588: 577: 572: 568: 559: 558: 548: 542:applicant  540: 539: 535: 519: 513:applicant  511: 506: 501: 495:applicant  493: 492: 488: 479: 468: 455: 454: 444: 438:applicant  436: 428: 422:applicant  420: 419: 415: 406: 395: 384: 368: 366: 363: 362: 332: 280: 259: 256: 255: 236: 231: 228: 227: 208: 203: 200: 199: 179: 171: 168: 167: 138: 133: 130: 129: 97: 94: 93: 63:decision theory 17: 12: 11: 5: 8471: 8461: 8460: 8455: 8450: 8445: 8440: 8435: 8420: 8419: 8079: 8070: 8068: 8065: 8064: 8063: 8055: 8045:Neil Bearden. 8042: 8023: 8013: 8012:External links 8010: 8009: 8008: 7983: 7973:(4): 481–486. 7960: 7939: 7929:(3): 221–236. 7918: 7889: 7883: 7870: 7842:(2): 700–714. 7829: 7823: 7802: 7783: 7750: 7723: 7705:(313): 35–73. 7694: 7680: 7649: 7640: 7622:(2): 189–206. 7611: 7592: 7580:(3): 882–889. 7565: 7535: 7505: 7484: 7456:(5): 410–425. 7445: 7422: 7419: 7417: 7416: 7409: 7383: 7371: 7359: 7347: 7335: 7306:(4): 972–982. 7286: 7259:(6): 467–479. 7243: 7194: 7155:(2): 628–633. 7135: 7123: 7108: 7093: 7081: 7025: 6990: 6963:(2): 207–219. 6947: 6926:(3): 446–466. 6906: 6887: 6848: 6833: 6821: 6809: 6796: 6766: 6754: 6742: 6716: 6680:(2): 126–133. 6659: 6646:(3): 282–289. 6618: 6616: 6613: 6612: 6611: 6606: 6601: 6596: 6591: 6589:Odds algorithm 6586: 6580: 6579: 6565: 6549: 6546: 6533: 6506: 6481: 6469: 6466: 6435:Martin Gardner 6407: 6404: 6372:functional MRI 6359: 6356: 6334: 6331: 6314: 6311: 6306: 6302: 6298: 6293: 6289: 6258: 6255: 6250: 6246: 6242: 6235: 6232: 6227: 6223: 6219: 6212: 6209: 6204: 6200: 6196: 6191: 6188: 6184: 6163: 6160: 6157: 6132: 6127: 6123: 6115: 6112: 6109: 6105: 6101: 6096: 6092: 6069: 6065: 6061: 6058: 6055: 6050: 6046: 6042: 6037: 6033: 6012: 5992: 5989: 5986: 5983: 5980: 5977: 5970: 5967: 5962: 5958: 5954: 5949: 5946: 5942: 5921: 5918: 5915: 5903: 5900: 5885: 5881: 5856: 5852: 5848: 5844: 5840: 5837: 5832: 5828: 5807: 5804: 5801: 5776: 5772: 5751: 5731: 5711: 5691: 5671: 5651: 5626: 5622: 5618: 5615: 5612: 5607: 5603: 5599: 5594: 5590: 5569: 5564: 5560: 5556: 5553: 5550: 5547: 5544: 5539: 5535: 5531: 5526: 5522: 5518: 5498: 5486: 5483: 5467: 5464: 5461: 5457: 5453: 5449: 5427: 5423: 5419: 5416: 5413: 5402:Vanderbei 1980 5386: 5383: 5379: 5357: 5354: 5351: 5331: 5311: 5290: 5282: 5278: 5274: 5270: 5266: 5262: 5257: 5253: 5250: 5235: 5232: 5216: 5213: 5210: 5207: 5204: 5201: 5194: 5190: 5186: 5167: 5164: 5159: 5156: 5134: 5131: 5126: 5121: 5118: 5098: 5078: 5058: 5038: 5018: 4997: 4977: 4972: 4967: 4947: 4942: 4937: 4917: 4891: 4886: 4883: 4863: 4843: 4823: 4820: 4815: 4810: 4806: 4802: 4798: 4793: 4788: 4767: 4766: 4755: 4749: 4744: 4738: 4733: 4728: 4725: 4720: 4714: 4709: 4703: 4697: 4694: 4689: 4686: 4656: 4653: 4650: 4645: 4641: 4629: 4628: 4617: 4611: 4608: 4605: 4600: 4597: 4594: 4591: 4586: 4581: 4576: 4573: 4570: 4567: 4561: 4556: 4553: 4547: 4542: 4537: 4533: 4530: 4527: 4521: 4515: 4512: 4509: 4504: 4501: 4498: 4494: 4489: 4485: 4481: 4475: 4472: 4469: 4465: 4460: 4455: 4450: 4445: 4441: 4438: 4435: 4429: 4423: 4420: 4417: 4412: 4409: 4406: 4402: 4397: 4391: 4388: 4385: 4380: 4377: 4374: 4370: 4366: 4363: 4360: 4357: 4352: 4348: 4324: 4321: 4318: 4315: 4312: 4292: 4270: 4248: 4243: 4238: 4218: 4213: 4208: 4184: 4173: 4172: 4161: 4155: 4152: 4149: 4145: 4140: 4136: 4132: 4129: 4124: 4120: 4115: 4109: 4105: 4100: 4096: 4093: 4088: 4084: 4059: 4053: 4049: 4045: 4042: 4039: 4034: 4030: 4026: 4021: 4017: 4012: 4008: 4005: 4000: 3996: 3980:expected value 3936: 3920: 3917: 3901: 3900: 3893: 3886: 3851: 3848: 3835: 3832: 3829: 3806: 3803: 3800: 3796: 3792: 3770: 3766: 3762: 3757: 3753: 3732: 3729: 3726: 3703: 3700: 3695: 3691: 3687: 3682: 3678: 3674: 3671: 3668: 3665: 3660: 3656: 3652: 3647: 3643: 3639: 3636: 3633: 3630: 3627: 3603: 3580: 3577: 3572: 3568: 3564: 3559: 3555: 3551: 3548: 3545: 3542: 3537: 3533: 3529: 3524: 3520: 3516: 3513: 3510: 3507: 3504: 3484: 3481: 3476: 3472: 3468: 3463: 3459: 3455: 3452: 3449: 3446: 3441: 3437: 3433: 3428: 3424: 3420: 3417: 3414: 3411: 3408: 3386: 3382: 3359: 3355: 3334: 3331: 3326: 3322: 3301: 3269: 3266: 3263: 3251: 3248: 3231: 3228: 3225: 3221: 3214: 3209: 3206: 3203: 3199: 3193: 3189: 3186: 3183: 3175: 3172: 3169: 3166: 3163: 3159: 3155: 3152: 3147: 3143: 3137: 3134: 3131: 3128: 3125: 3121: 3117: 3112: 3108: 3104: 3101: 3098: 3078: 3069:stopping rule 3052: 3048: 3044: 3041: 3038: 3035: 3032: 3027: 3023: 2993: 2989: 2985: 2980: 2976: 2955: 2952: 2932: 2929: 2909: 2906: 2903: 2900: 2897: 2894: 2874: 2871: 2868: 2841: 2838: 2835: 2831: 2824: 2819: 2816: 2813: 2809: 2803: 2799: 2796: 2793: 2785: 2782: 2779: 2776: 2773: 2769: 2765: 2762: 2757: 2753: 2747: 2744: 2741: 2738: 2735: 2731: 2727: 2722: 2718: 2714: 2711: 2708: 2688: 2685: 2682: 2679: 2676: 2673: 2670: 2667: 2664: 2661: 2658: 2638: 2635: 2632: 2629: 2626: 2623: 2620: 2617: 2614: 2611: 2608: 2588: 2585: 2582: 2579: 2576: 2573: 2570: 2567: 2564: 2561: 2558: 2534: 2531: 2528: 2525: 2522: 2519: 2516: 2496: 2493: 2490: 2487: 2484: 2481: 2478: 2469:is changed to 2458: 2455: 2452: 2449: 2446: 2443: 2440: 2418: 2414: 2410: 2407: 2404: 2401: 2398: 2393: 2389: 2385: 2380: 2376: 2353: 2349: 2345: 2342: 2339: 2336: 2333: 2328: 2324: 2320: 2315: 2311: 2286: 2261: 2257: 2253: 2250: 2247: 2244: 2241: 2236: 2232: 2228: 2223: 2219: 2198: 2170: 2166: 2162: 2159: 2156: 2153: 2150: 2145: 2141: 2137: 2132: 2128: 2112: 2109: 2108: 2107: 2104: 2093: 2092: 2089: 2086: 2074: 2029:Martin Gardner 2020: 2017: 2000: 1980: 1960: 1937: 1922: 1921: 1917: 1916: 1904: 1892: 1891: 1879: 1845: 1825: 1805: 1802: 1798: 1794: 1791: 1788: 1785: 1782: 1779: 1759: 1748: 1747: 1735: 1732: 1729: 1726: 1723: 1702: 1699: 1696: 1693: 1690: 1687: 1682: 1677: 1673: 1669: 1666: 1663: 1660: 1657: 1634: 1614: 1611: 1608: 1605: 1602: 1582: 1561: 1541: 1538: 1535: 1532: 1529: 1509: 1506: 1493: 1466: 1463: 1460: 1457: 1454: 1451: 1448: 1444: 1440: 1437: 1434: 1431: 1428: 1408: 1388: 1372: 1369: 1365:odds algorithm 1360: 1357: 1344: 1341: 1338: 1334: 1330: 1317: 1316: 1313: 1310: 1307: 1304: 1301: 1298: 1295: 1292: 1289: 1286: 1275: 1264: 1263: 1260: 1257: 1254: 1251: 1248: 1245: 1242: 1239: 1236: 1233: 1222: 1211: 1210: 1207: 1204: 1201: 1198: 1195: 1192: 1189: 1186: 1183: 1180: 1169: 1135:, the optimal 1108:is equal to 1/ 1089: 1070: 1069: 1058: 1054: 1051: 1048: 1045: 1042: 1039: 1036: 1033: 1030: 1027: 1021: 1018: 1011: 1006: 1002: 998: 995: 992: 989: 986: 983: 932: 893: 892: 877: 871: 868: 865: 861: 854: 849: 846: 843: 839: 833: 829: 826: 823: 817: 814: 812: 810: 805: 802: 797: 793: 786: 783: 780: 775: 772: 769: 761: 756: 753: 750: 746: 741: 737: 734: 732: 730: 725: 722: 717: 713: 708: 699: 690: 678: 675: 672: 664: 663: 655: 652: 649: 641: 640: 637: 633: 629: 624: 619: 616: 613: 609: 605: 602: 597: 594: 591: 586: 583: 580: 576: 571: 567: 564: 562: 560: 556: 547: 538: 534: 531: 527: 518: 509: 500: 491: 487: 482: 477: 474: 471: 467: 463: 460: 458: 456: 452: 443: 435: 427: 418: 414: 409: 404: 401: 398: 394: 390: 387: 385: 383: 380: 377: 374: 371: 370: 331: 328: 315: 314: 310: 307: 304: 301: 298: 287: 279: 276: 263: 243: 239: 235: 215: 211: 207: 186: 182: 178: 175: 145: 141: 137: 126:odds algorithm 101: 15: 9: 6: 4: 3: 2: 8470: 8459: 8456: 8454: 8451: 8449: 8446: 8444: 8441: 8439: 8436: 8434: 8431: 8430: 8428: 8075: 8071: 8061: 8060: 8056: 8052: 8048: 8043: 8038: 8037: 8032: 8029: 8024: 8022: 8016: 8015: 8004: 7999: 7992: 7988: 7984: 7980: 7976: 7972: 7968: 7967: 7961: 7957: 7953: 7949: 7945: 7940: 7936: 7932: 7928: 7924: 7919: 7915: 7911: 7907: 7903: 7899: 7895: 7890: 7886: 7880: 7876: 7871: 7867: 7863: 7859: 7855: 7850: 7845: 7841: 7837: 7836: 7830: 7826: 7820: 7816: 7812: 7808: 7803: 7800: 7796: 7792: 7788: 7784: 7780: 7776: 7772: 7768: 7764: 7760: 7756: 7751: 7746: 7741: 7737: 7733: 7729: 7724: 7720: 7716: 7712: 7708: 7704: 7700: 7695: 7691: 7687: 7683: 7677: 7673: 7669: 7664: 7663:10.1.1.161.41 7659: 7655: 7650: 7646: 7641: 7637: 7633: 7629: 7625: 7621: 7617: 7612: 7608: 7602: 7593: 7588: 7583: 7579: 7575: 7571: 7566: 7561: 7556: 7552: 7548: 7544: 7540: 7536: 7531: 7526: 7522: 7518: 7514: 7511:(June 2000). 7510: 7506: 7502: 7498: 7494: 7490: 7485: 7481: 7477: 7473: 7469: 7464: 7459: 7455: 7451: 7446: 7442: 7438: 7434: 7430: 7425: 7424: 7412: 7406: 7402: 7398: 7394: 7387: 7380: 7379:Ferguson 1989 7375: 7368: 7363: 7356: 7351: 7344: 7339: 7331: 7327: 7322: 7317: 7313: 7309: 7305: 7301: 7297: 7290: 7282: 7278: 7274: 7270: 7266: 7262: 7258: 7254: 7247: 7239: 7235: 7230: 7225: 7221: 7217: 7213: 7209: 7205: 7198: 7190: 7186: 7181: 7176: 7171: 7166: 7162: 7158: 7154: 7150: 7146: 7139: 7133: 7127: 7120: 7115: 7113: 7105: 7100: 7098: 7090: 7085: 7077: 7071: 7063: 7059: 7055: 7051: 7047: 7043: 7039: 7035: 7029: 7021: 7017: 7013: 7009: 7006:(19): 51–65. 7005: 7001: 6994: 6986: 6982: 6978: 6974: 6970: 6966: 6962: 6958: 6951: 6943: 6939: 6934: 6929: 6925: 6921: 6917: 6910: 6902: 6898: 6891: 6883: 6879: 6875: 6871: 6867: 6863: 6859: 6852: 6844: 6837: 6830: 6825: 6818: 6813: 6799: 6793: 6789: 6785: 6781: 6777: 6770: 6763: 6758: 6751: 6746: 6731: 6727: 6720: 6713: 6709: 6703: 6699: 6695: 6691: 6687: 6683: 6679: 6675: 6674: 6669: 6663: 6654: 6649: 6645: 6641: 6637: 6630: 6628: 6626: 6624: 6619: 6610: 6607: 6605: 6604:Search theory 6602: 6600: 6597: 6595: 6592: 6590: 6587: 6585: 6582: 6581: 6577: 6571: 6566: 6563: 6557: 6552: 6545: 6531: 6522: 6520: 6504: 6496: 6479: 6465: 6463: 6459: 6458:Arthur Cayley 6454: 6452: 6448: 6443: 6441: 6436: 6431: 6429: 6425: 6424:Samuel Karlin 6421: 6417: 6413: 6403: 6401: 6397: 6393: 6389: 6385: 6381: 6377: 6373: 6368: 6365: 6355: 6353: 6348: 6344: 6340: 6339:psychologists 6337:Experimental 6330: 6312: 6309: 6304: 6300: 6296: 6291: 6287: 6278: 6274: 6256: 6253: 6248: 6244: 6240: 6233: 6230: 6225: 6221: 6217: 6210: 6207: 6202: 6198: 6194: 6189: 6186: 6182: 6161: 6158: 6155: 6146: 6130: 6125: 6121: 6107: 6099: 6094: 6090: 6067: 6063: 6059: 6056: 6053: 6048: 6044: 6040: 6035: 6031: 6010: 5981: 5975: 5968: 5965: 5960: 5956: 5952: 5947: 5944: 5940: 5919: 5916: 5913: 5899: 5883: 5879: 5854: 5850: 5846: 5842: 5838: 5835: 5830: 5826: 5799: 5790: 5774: 5770: 5749: 5729: 5709: 5689: 5669: 5649: 5640: 5624: 5620: 5616: 5613: 5610: 5605: 5601: 5597: 5592: 5588: 5562: 5558: 5554: 5551: 5548: 5545: 5542: 5537: 5533: 5529: 5524: 5520: 5496: 5482: 5465: 5462: 5459: 5455: 5451: 5447: 5425: 5421: 5417: 5414: 5411: 5403: 5384: 5381: 5377: 5349: 5329: 5309: 5288: 5280: 5276: 5272: 5268: 5264: 5260: 5255: 5251: 5248: 5239: 5231: 5211: 5208: 5205: 5199: 5192: 5188: 5184: 5173: 5163: 5155: 5152: 5146: 5132: 5129: 5124: 5119: 5116: 5096: 5076: 5056: 5036: 5016: 4995: 4970: 4940: 4915: 4908:is convex in 4907: 4889: 4884: 4881: 4861: 4841: 4821: 4818: 4813: 4808: 4800: 4796: 4791: 4771: 4753: 4747: 4742: 4736: 4731: 4726: 4723: 4718: 4712: 4707: 4701: 4695: 4687: 4674: 4673: 4672: 4670: 4651: 4643: 4639: 4615: 4609: 4606: 4603: 4598: 4595: 4592: 4589: 4584: 4579: 4574: 4571: 4568: 4565: 4559: 4554: 4551: 4545: 4540: 4535: 4531: 4528: 4525: 4519: 4513: 4510: 4507: 4502: 4499: 4496: 4492: 4487: 4483: 4479: 4473: 4470: 4467: 4463: 4458: 4453: 4448: 4443: 4439: 4436: 4433: 4427: 4421: 4418: 4415: 4410: 4407: 4404: 4400: 4395: 4389: 4386: 4383: 4378: 4375: 4372: 4368: 4364: 4358: 4350: 4346: 4338: 4337: 4336: 4322: 4319: 4316: 4313: 4310: 4290: 4268: 4241: 4211: 4198: 4182: 4159: 4153: 4150: 4147: 4143: 4138: 4134: 4130: 4127: 4122: 4118: 4107: 4103: 4098: 4094: 4091: 4086: 4082: 4074: 4073: 4072: 4057: 4051: 4047: 4043: 4040: 4037: 4032: 4028: 4024: 4019: 4015: 4010: 4003: 3998: 3994: 3985: 3981: 3976: 3973: 3969: 3965: 3961: 3957: 3953: 3950: 3934: 3925: 3916: 3914: 3910: 3906: 3898: 3894: 3891: 3887: 3884: 3881: =  3880: 3875: 3871: 3870: 3869: 3867: 3859: 3855: 3847: 3833: 3830: 3827: 3818: 3804: 3801: 3798: 3794: 3790: 3768: 3764: 3760: 3755: 3751: 3730: 3727: 3724: 3715: 3693: 3689: 3685: 3680: 3676: 3666: 3658: 3654: 3650: 3645: 3641: 3628: 3625: 3617: 3601: 3592: 3570: 3566: 3562: 3557: 3553: 3543: 3535: 3531: 3527: 3522: 3518: 3505: 3502: 3474: 3470: 3466: 3461: 3457: 3447: 3439: 3435: 3431: 3426: 3422: 3409: 3406: 3384: 3380: 3357: 3353: 3332: 3329: 3324: 3320: 3299: 3291: 3287: 3283: 3267: 3264: 3261: 3246: 3229: 3226: 3223: 3219: 3212: 3207: 3204: 3201: 3197: 3191: 3187: 3184: 3181: 3173: 3170: 3167: 3164: 3161: 3153: 3145: 3141: 3135: 3132: 3129: 3126: 3123: 3115: 3110: 3106: 3099: 3096: 3076: 3068: 3050: 3046: 3042: 3039: 3036: 3033: 3030: 3025: 3021: 3010: 3007: 2991: 2987: 2983: 2978: 2974: 2953: 2950: 2930: 2927: 2904: 2901: 2898: 2892: 2872: 2869: 2866: 2856: 2839: 2836: 2833: 2829: 2822: 2817: 2814: 2811: 2807: 2801: 2797: 2794: 2791: 2783: 2780: 2777: 2774: 2771: 2763: 2755: 2751: 2745: 2742: 2739: 2736: 2733: 2725: 2720: 2716: 2709: 2706: 2683: 2680: 2677: 2674: 2671: 2668: 2665: 2662: 2659: 2633: 2630: 2627: 2624: 2621: 2618: 2615: 2612: 2609: 2583: 2580: 2577: 2574: 2571: 2568: 2565: 2562: 2559: 2548: 2532: 2529: 2526: 2523: 2520: 2517: 2514: 2494: 2491: 2488: 2485: 2482: 2479: 2476: 2456: 2453: 2450: 2447: 2444: 2441: 2438: 2416: 2412: 2408: 2405: 2402: 2399: 2396: 2391: 2387: 2383: 2378: 2374: 2351: 2347: 2343: 2340: 2337: 2334: 2331: 2326: 2322: 2318: 2313: 2309: 2300: 2297:for Bob is a 2284: 2275: 2259: 2255: 2251: 2248: 2245: 2242: 2239: 2234: 2230: 2226: 2221: 2217: 2196: 2189: 2188:stopping rule 2184: 2168: 2164: 2160: 2157: 2154: 2151: 2148: 2143: 2139: 2135: 2130: 2126: 2118: 2105: 2103:to trick Bob. 2102: 2098: 2097: 2096: 2090: 2087: 2072: 2064: 2063: 2062: 2060: 2059:zero-sum game 2056: 2050: 2048: 2042: 2041: 2039: 2034: 2030: 2026: 2016: 2012: 1998: 1978: 1958: 1949: 1935: 1927: 1919: 1918: 1902: 1894: 1893: 1877: 1869: 1868: 1867: 1866: 1861: 1859: 1843: 1823: 1803: 1800: 1796: 1792: 1789: 1783: 1777: 1770:be such that 1757: 1733: 1730: 1727: 1724: 1721: 1700: 1697: 1691: 1685: 1680: 1675: 1671: 1667: 1661: 1655: 1648: 1647: 1646: 1632: 1609: 1606: 1603: 1580: 1559: 1536: 1533: 1530: 1518: 1516: 1505: 1491: 1482: 1464: 1461: 1458: 1455: 1452: 1449: 1446: 1438: 1435: 1432: 1426: 1406: 1386: 1377: 1368: 1366: 1356: 1342: 1339: 1336: 1332: 1328: 1314: 1311: 1308: 1305: 1302: 1299: 1296: 1293: 1290: 1287: 1273: 1266: 1265: 1261: 1258: 1255: 1252: 1249: 1246: 1243: 1240: 1237: 1234: 1220: 1213: 1212: 1208: 1205: 1202: 1199: 1196: 1193: 1190: 1187: 1184: 1181: 1167: 1160: 1159: 1156: 1154: 1150: 1146: 1142: 1138: 1134: 1129: 1127: 1123: 1119: 1115: 1111: 1107: 1103: 1087: 1079: 1075: 1056: 1049: 1043: 1040: 1037: 1034: 1031: 1028: 1025: 1019: 1016: 1009: 1004: 1000: 996: 993: 987: 981: 974: 973: 972: 970: 966: 962: 958: 954: 950: 946: 930: 922: 918: 914: 910: 906: 902: 898: 875: 869: 866: 863: 859: 852: 847: 844: 841: 837: 831: 827: 824: 821: 815: 813: 803: 800: 795: 791: 784: 781: 778: 773: 770: 767: 759: 754: 751: 748: 744: 739: 735: 733: 723: 720: 715: 711: 706: 697: 688: 676: 673: 670: 653: 650: 647: 631: 627: 622: 617: 614: 611: 607: 603: 600: 595: 592: 589: 584: 581: 578: 574: 569: 565: 563: 554: 545: 536: 532: 529: 525: 516: 498: 489: 485: 480: 475: 472: 469: 465: 461: 459: 450: 441: 433: 425: 416: 412: 407: 402: 399: 396: 392: 388: 386: 378: 372: 361: 360: 359: 357: 353: 349: 345: 341: 337: 336:stopping rule 327: 324: 320: 311: 308: 305: 302: 299: 296: 292: 288: 285: 284: 283: 275: 261: 241: 237: 233: 213: 209: 205: 184: 180: 176: 173: 165: 161: 160: 143: 139: 135: 127: 122: 120: 116: 115:stopping rule 99: 90: 88: 84: 80: 76: 72: 68: 64: 60: 56: 52: 48: 40: 36: 32: 28: 23: 19: 8074: 8058: 8051:the original 8034: 7970: 7964: 7947: 7943: 7926: 7922: 7897: 7893: 7874: 7839: 7833: 7806: 7798: 7790: 7785:Hill, T.P. " 7762: 7758: 7735: 7731: 7702: 7698: 7653: 7644: 7619: 7615: 7577: 7573: 7550: 7546: 7520: 7516: 7492: 7488: 7453: 7449: 7432: 7428: 7392: 7386: 7374: 7362: 7357:, Problem 3. 7355:Gardner 1966 7350: 7338: 7303: 7299: 7289: 7256: 7252: 7246: 7211: 7207: 7197: 7152: 7148: 7138: 7126: 7084: 7070:cite journal 7045: 7041: 7028: 7003: 6999: 6993: 6960: 6956: 6950: 6923: 6919: 6909: 6900: 6897:Scripta Math 6896: 6890: 6865: 6861: 6851: 6836: 6829:Bearden 2006 6824: 6812: 6801:, retrieved 6779: 6769: 6762:Gardner 1966 6757: 6745: 6733:. Retrieved 6729: 6719: 6711: 6677: 6671: 6662: 6643: 6639: 6523: 6471: 6455: 6446: 6444: 6432: 6427: 6409: 6369: 6364:neuroscience 6361: 6336: 6275: 6147: 5905: 5818:limit, each 5791: 5641: 5488: 5240: 5237: 5169: 5161: 5150: 5147: 4905: 4777: 4668: 4630: 4196: 4174: 4071:is given by 3983: 3977: 3971: 3967: 3963: 3951: 3926: 3922: 3912: 3908: 3904: 3902: 3896: 3889: 3882: 3878: 3873: 3864: 3853: 3819: 3716: 3615: 3593: 3372:, else pick 3345:, then pick 3253: 3066: 3012: 3008: 2857: 2546: 2298: 2276: 2185: 2114: 2094: 2054: 2052: 2046: 2044: 2036: 2022: 2013: 1950: 1923: 1865:1/e-strategy 1864: 1862: 1858:1/e-strategy 1857: 1749: 1519: 1514: 1511: 1480: 1378: 1374: 1362: 1320: 1152: 1148: 1144: 1136: 1132: 1130: 1125: 1121: 1117: 1113: 1109: 1105: 1101: 1077: 1073: 1071: 968: 964: 960: 956: 952: 948: 944: 920: 916: 912: 908: 904: 900: 896: 894: 355: 351: 347: 343: 339: 333: 322: 318: 316: 294: 290: 281: 157: 123: 91: 86: 82: 78: 74: 70: 66: 46: 44: 38: 34: 30: 26: 18: 8405:print_table 8396:to_markdown 8369:'n' 8267:print_table 7950:: 140–152. 7795:cover story 7765:: 226–240. 7048:(1): 3–13. 6817:Gnedin 1994 6750:Gnedin 2021 6708:cover story 4671:, one gets 1371:Limitations 278:Formulation 79:googol game 8427:Categories 7996:(Report). 7900:(3): 215. 7421:References 7367:Bruss 1984 7343:Flood 1958 6903:: 289–292. 6735:6 February 6497:where the 6343:economists 4199:is either 313:otherwise. 289:There are 81:, and the 59:statistics 8387:transpose 8300:DataFrame 8036:MathWorld 7998:CiteSeerX 7849:1204.5537 7779:245449000 7658:CiteSeerX 7458:CiteSeerX 7062:2299-4009 7020:0137-2890 6985:121339045 6977:0022-3239 6942:0022-247X 6882:0025-1909 6730:Big Think 6702:124798270 6694:1545-2786 6521:problem. 6440:Leo Moser 6305:− 6249:− 6226:− 6203:− 6187:− 6114:∞ 6111:→ 6057:⋯ 5988:∞ 5985:→ 5961:− 5945:− 5847:− 5836:∼ 5806:∞ 5803:→ 5614:⋯ 5356:∞ 5353:→ 5209:− 5130:− 4976:⌉ 4966:⌈ 4946:⌋ 4936:⌊ 4805:∂ 4787:∂ 4708:− 4693:∂ 4685:∂ 4596:− 4575:− 4529:− 4511:− 4493:∏ 4437:− 4419:− 4401:∏ 4387:− 4369:∑ 4320:≤ 4314:≤ 4247:⌉ 4237:⌈ 4217:⌋ 4207:⌊ 4041:… 3805:ϵ 3725:ϵ 3629:∈ 3506:∈ 3227:− 3198:∑ 3185:− 3165:∈ 3154:≤ 3127:∈ 3111:τ 3077:τ 2928:− 2837:− 2808:∑ 2795:− 2775:∈ 2737:∈ 2721:τ 2285:τ 2197:τ 1999:τ 1979:τ 1844:τ 1824:τ 1784:τ 1758:τ 1731:≤ 1725:≤ 1672:∫ 1625:and let 1465:⋯ 1340:≈ 1044:⁡ 1035:− 1001:∫ 867:− 838:∑ 825:− 796:⋅ 782:− 771:− 745:∑ 716:⋅ 674:− 651:− 608:∑ 593:− 575:∑ 530:⋅ 466:∑ 434:∩ 393:∑ 319:candidate 297:is known. 174:∼ 7989:(2012). 7866:31778896 7435:: 58–9. 7330:24142842 7273:18464792 7238:12417672 6548:See also 6380:parietal 6082:, where 5580:, where 5289:⌋ 5256:⌊ 5151:learning 4904:. Since 3820:But for 3410:∉ 3288:and the 3286:T. 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Index


optimal stopping
applied probability
statistics
decision theory
stopping rule
selection algorithm
odds algorithm
e
natural logarithm
stopping rule
dynamic programming
odds algorithm
F. Thomas Bruss
Ferguson
Martin Gardner
Mathematical Games column
Scientific American
zero-sum game
joint probability distribution
exchangeable random variable sequence
stopping rule
minimax
T. Cover
two envelopes paradox

Stein, Seale & Rapoport 2003
random variables
i.i.d.
uniform distribution

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