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Extensive-form game

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646:. Consider a game consisting of an employer considering whether to hire a job applicant. The job applicant's ability might be one of two things: high or low. Their ability level is random; they either have low ability with probability 1/3 or high ability with probability 2/3. In this case, it is convenient to model nature as another player of sorts who chooses the applicant's ability according to those probabilities. Nature however does not have any payoffs. Nature's choice is represented in the game tree by a non-filled node. Edges coming from a nature's choice node are labelled with the probability of the event it represents occurring. 658:
probability the type of player 1 (which in this game is tantamount to selecting the payoffs in the subgame played), either t1 or t2. Player 1 has distinct information sets for these; i.e. player 1 knows what type they are (this need not be the case). However, player 2 does not observe nature's choice. They do not know the type of player 1; however, in this game they do observe player 1's actions; i.e. there is perfect information. Indeed, it is now appropriate to alter the above definition of complete information: at every stage in the game, every player knows what has been played
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delimiting numbers are placed at the bottom and top of the arc respectively, usually with a variable that is used to express the payoffs. The infinite number of decision nodes that could result are represented by a single node placed in the centre of the arc. A similar device is used to represent action spaces that, whilst not infinite, are large enough to prove impractical to represent with an edge for each action.
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The game on the right has two players: 1 and 2. The numbers by every non-terminal node indicate to which player that decision node belongs. The numbers by every terminal node represent the payoffs to the players (e.g. 2,1 represents a payoff of 2 to player 1 and a payoff of 1 to player 2). The labels
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The game on the right is the same as the above game except that player 2 does not know what player 1 does when they come to play. The first game described has perfect information; the game on the right does not. If both players are rational and both know that both players are rational and everything
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with payoffs (no imperfect or incomplete information), and add the other elements in subsequent chapters as refinements. Whereas the rest of this article follows this gentle approach with motivating examples, we present upfront the finite extensive-form games as (ultimately) constructed here. This
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It may be that a player has an infinite number of possible actions to choose from at a particular decision node. The device used to represent this is an arc joining two edges protruding from the decision node in question. If the action space is a continuum between two numbers, the lower and upper
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The above presentation, while precisely defining the mathematical structure over which the game is played, elides however the more technical discussion of formalizing statements about how the game is played like "a player cannot distinguish between nodes in the same information set when making a
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A play is thus a path through the tree from the root to a terminal node. At any given non-terminal node belonging to Chance, an outgoing branch is chosen according to the probability distribution. At any rational player's node, the player must choose one of the equivalence classes for the edges,
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An advantage of representing the game in this way is that it is clear what the order of play is. The tree shows clearly that player 1 moves first and player 2 observes this move. However, in some games play does not occur like this. One player does not always observe the choice of another (for
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The game on the left is one of complete information (all the players and payoffs are known to everyone) but of imperfect information (the employer doesn't know what nature's move was.) The initial node is in the centre and it is not filled, so nature moves first. Nature selects with the same
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When the game reaches the information set, the player who is about to move cannot differentiate between nodes within the information set; i.e. if the information set contains more than one node, the player to whom that set belongs does not know which node in the set has been
134:+1 subsets, one for each (rational) player, and with a special subset for a fictitious player called Chance (or Nature). Each player's subset of nodes is referred to as the "nodes of the player". (A game of complete information thus has an empty set of Chance nodes.) 602:
In games with infinite action spaces and imperfect information, non-singleton information sets are represented, if necessary, by inserting a dotted line connecting the (non-nodal) endpoints behind the arc described above or by dashing the arc itself. In the
319:. The payoffs are as specified in the tree. There are four outcomes represented by the four terminal nodes of the tree: (U,U'), (U,D'), (D,U') and (D,D'). The payoffs associated with each outcome respectively are as follows (0,0), (2,1), (1,2) and (3,1). 899: 665:
In this game, if nature selects t1 as player 1's type, the game played will be like the very first game described, except that player 2 does not know it (and the very fact that this cuts through their information sets disqualify it from
1954: 2242:. The same process can be done for the leader except that in calculating its profit, it knows that firm 2 will play the above response and so this can be substituted into its maximisation problem. It can then solve for 1873: 1684: 473:. In this equilibrium, every strategy is rational given the beliefs held and every belief is consistent with the strategies played. Notice how the imperfection of information changes the outcome of the game. 1290: 598:
These preferences can be marked within the matrix, and any box where both players have a preference provides a nash equilibrium. This particular game has a single solution of (D,U’) with a payoff of (1,2).
684:, player 2 can only form the belief that they are on either node in the information set with probability 1/2 (because this is the chance of seeing either type). Player 2 maximises their payoff by playing 2240: 172:
which determines precisely one outgoing edge except (in general) the player doesn't know which one is being followed. (An outside observer knowing every other player's choices up to that point, and the
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We will have a two by two matrix with a unique payoff for each combination of moves. Using the normal form game, it is now possible to solve the game and identify dominant strategies for both players.
2349: 1388: 50:) information each player has about the other player's moves when they make a decision, and their payoffs for all possible game outcomes. Extensive-form games also allow for the representation of 2881:, 6.1, "Disasters in Game Theory" and 7.2 "Measurability (The Axiom of Determinateness)", discusses problems in extending the finite-case definition to infinite number of options (or moves) 151:
there is a one-to-one correspondence between outgoing edges of any two nodes of the same information set—thus the set of all outgoing edges of an information set is partitioned in
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between 0 and 5000). This would be specified elsewhere. Here, it will be supposed that it is the former and, for concreteness, it will be supposed it represents two firms engaged in
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In extensive form, an information set is indicated by a dotted line connecting all nodes in that set or sometimes by a loop drawn around all the nodes in that set.
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that is known by any player is known to be known by every player (i.e. player 1 knows player 2 knows that player 1 is rational and player 2 knows this, etc.
662:. In the case of private information, every player knows what has been played by nature. Information sets are represented as before by broken lines. 184:—choosing precisely one class of outgoing edges for every information set (of his). In a game of perfect information, the information sets are 445:
In the second game it is less clear: player 2 cannot observe player 1's move. Player 1 would like to fool player 2 into thinking they have played
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allowing (as the name suggests) for the explicit representation of a number of key aspects, like the sequencing of players' possible moves, their
426:(because to player 2 a payoff of 2 is better than a payoff of 1) and player 1 will receive 1. Hence, in the first game, the equilibrium will be ( 1783: 607:
described above, if the second player had not observed the first player's move the game would no longer fit the Stackelberg model; it would be
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The initial node belongs to player 1, indicating that player 1 moves first. Play according to the tree is as follows: player 1 chooses between
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in that they provide a more complete description of the game in question, whereas normal-form simply boils down the game into a payoff matrix.
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is such that at any stage of the game, every player knows exactly what has taken place earlier in the game; i.e. every information set is a
189: 1625: 1240: 2787: 2159: 2354: 907: 2549: 2276: 418:(because for player 2 a payoff of 1 is preferable to a payoff of 0) and so player 1 will receive 2. However, if player 1 plays 1347: 2964: 2932: 2874: 2844: 2777: 2729: 2707: 2668: 2635: 2602: 3868: 2804:(1957). Games and decisions: introduction and critical survey. (Ch3: Extensive and Normal Forms, pp39–55). Wiley New York. 2741:(1961). The mathematics of games of strategy: theory and applications (Ch4: Games in extensive form, pp74–78). Rand Corp. 259:
has both moves of chance (the cards being dealt) and imperfect information (the cards secretly held by other players). (
3685: 3215: 3013: 188:. It's less evident how payoffs should be interpreted in games with Chance nodes. It is assumed that each player has a 2939:
contains Kuhn's lectures at Princeton from 1952 (officially unpublished previously, but in circulation as photocopies)
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Some authors, particularly in introductory textbooks, initially define the extensive-form game as being just a
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every (directed) path in the tree from the root to a terminal node can cross each information set at most once
3645: 3058: 3033: 361: 145: 43: 629:. In extensive form it is represented as a game with complete but imperfect information using the so-called 3995: 3421: 3170: 3160: 3095: 2435: 894:{\displaystyle \Gamma =\langle {\mathcal {K}},\mathbf {H} ,,\{A(H)\}_{H\in \mathbf {H} },a,\rho ,u\rangle } 674: 458: 255:, has no imperfect information (all information sets are singletons) but has moves of chance. For example, 2784: 3210: 3190: 2818:
1994. A course in game theory (Ch6 Extensive game with perfect information, pp. 89–115). MIT press.
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defined for every game outcome; this assumption entails that every rational player will evaluate an
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It may be the case that a player does not know exactly what the payoffs of the game are or of what
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If both types play the same action (pooling), an equilibrium cannot be sustained. If both play
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to maximise their payoff and so player 1 will only receive 1. However, if player 1 plays
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The tree on the left represents such a game, either with infinite action spaces (any
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If a game has an information set with more than one member that game is said to have
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of each payoff function with respect to the follower's (firm 2) strategy variable (
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PBS Infinite Series. Perfect information defined at 0:25, with academic sources
3843: 3833: 3823: 3758: 3748: 3738: 3723: 3519: 3499: 3484: 3479: 3439: 3406: 3391: 3386: 3376: 3180: 2797: 2738: 638: 410:), play in the first game will be as follows: player 1 knows that if they play 244: 197: 123:, meaning there is one payoff for each player at the end of every possible play 76: 2851: 2678: 2645: 2612: 2564: 653:
A game with incomplete and imperfect information represented in extensive form
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If player 2 plays Up (U’), player 1 prefers to play Down (D) (Payoff 1>0)
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If player 1 plays Down (D), player 2 prefers to play Up (U’) (Payoff 2>1)
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If player 1 plays Up (U), player 2 prefers to play Down (D’) (Payoff 1>0)
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by every edge of the graph are the name of the action that edge represents.
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the payoffs received by every player for every possible combination of moves
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the complete description of the game specified by the above parameters is
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Multiagent Systems: Algorithmic, Game-Theoretic, and Logical Foundations
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If player 2 plays Down (D’), player 1 prefers to play Down (D) (3>2)
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set. Any game without perfect information has imperfect information.
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Essentials of Game Theory: A Concise, Multidisciplinary Introduction
2755:(1991) Game theory (Ch3 Extensive form games, pp67–106). MIT press. 677:; i.e. an equilibrium in which different types do different things. 3944: 3444: 2580: 457:
and player 1 will receive 3. In fact in the second game there is a
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https://www.math.uni-hamburg/Infinite Games, Yurii Khomskii (2010)
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between 0 and 5000) or with very large action spaces (perhaps any
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be a set of decision nodes) and an immediate predecessor function
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and player 1 receives 2. Player 1 prefers 2 to 1 and so will play
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and player 2 holds the belief that player 1 will definitely play
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Each set of nodes of a rational player is further partitioned in
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A game with infinite action spaces represented in extensive form
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example, moves may be simultaneous or a move may be hidden). An
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A game with imperfect information represented in extensive form
311:; player 2 observes player 1's choice and then chooses between 2783:. An 88-page mathematical introduction; see Chapters 4 and 5. 2767: 434:) because player 1 prefers to receive 2 to 1 and so will play 3434: 1989:. The payoffs to the firms are represented on the left, with 256: 240: 113: 91:-player extensive-form game thus consists of the following: 2892:
Neumann, J. (1928). "Zur Theorie der Gesellschaftsspiele".
2235:{\displaystyle q_{2}(q_{1})={\tfrac {5000-q_{1}-c_{2}}{2}}} 636:. This transformation introduces to the game the notion of 39: 2425:{\displaystyle q_{2}^{*}={\tfrac {5000+2c_{1}-3c_{2}}{4}}} 2113:
as some constants (here marginal costs to each firm). The
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is a family of probabilities of the actions of nature, and
958:{\displaystyle {\mathcal {K}}=\langle V,v^{0},T,p\rangle } 2344:{\displaystyle q_{1}^{*}={\tfrac {5000+c_{2}-2c_{1}}{2}}} 759:
Formally, a finite game in extensive form is a structure
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of Nature's moves, can determine the edge precisely.) A
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is a set of actions available for each information set
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whatever action they observe, but then type 1 prefers
2694:(1992). "Games in extensive and strategic forms". In 2438: 2357: 2351:. Feeding this into firm 2's best response function, 2279: 2250: 2162: 2129: 2090: 2059: 2028: 1997: 1883: 1786: 1758: 1714: 1692: 1628: 1608: 1554: 1531: 1502: 1473: 1453: 1396: 1350: 1318: 1298: 1243: 1217: 1189: 1160: 1138: 1116: 1082: 1050: 1024: 991: 971: 910: 765: 2772:, San Rafael, CA: Morgan & Claypool Publishers, 727:. The only equilibrium hence is with type 1 playing 696:. This cannot be an equilibrium. If both types play 278:
for every player every opportunity they have to move
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A complete extensive-form representation specifies:
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Wide-ranging representation of a game in game theory
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Infinite Games (section 1.1), Yurii Khomskii (2010)
266: 2828: 2765: 2700:Handbook of Game Theory with Economic Applications 2480: 2424: 2343: 2263: 2234: 2142: 2103: 2072: 2041: 2010: 1948: 1867: 1770: 1744: 1700: 1678: 1614: 1594: 1537: 1517: 1488: 1459: 1439: 1382: 1333: 1304: 1284: 1227: 1211:which forms a partition on the set of all actions 1203: 1175: 1144: 1124: 1100: 1068: 1036: 1010: 977: 957: 893: 209: 112:Each terminal (leaf) node of the game tree has an 4023: 2560: 2558: 2545: 2543: 1108:on which the rules of the game are represented, 79:in 1953, who extended an earlier definition of 2864: 2661:Strategy : an introduction to game theory 2628:Strategy : an introduction to game theory 2595:Strategy : an introduction to game theory 498:game, player one and player two each have two 281:what each player can do at each of their moves 130:of the non-terminal nodes of the game tree in 65: 58:". Extensive-form representations differ from 2958: 2658: 2625: 2592: 2555: 2540: 1752:be a single player that makes a move at node 1292:is an action partition associating each node 334:, player 2 maximises their payoff by playing 1862: 1793: 1671: 1665: 1589: 1565: 1269: 1256: 952: 921: 888: 853: 837: 772: 369:Every node in the set belongs to one player. 623:their opponents are. This sort of game has 204:decision". These can be made precise using 83:from 1928. Following the presentation from 2965: 2951: 2829:Shoham, Yoav; Leyton-Brown, Kevin (2009), 2766:Leyton-Brown, Kevin; Shoham, Yoav (2008), 1595:{\displaystyle {\mathcal {I}}=\{1,...,I\}} 1440:{\displaystyle a_{v}:s(v)\rightarrow A(H)} 2972: 2488:is the subgame perfect Nash equilibrium. 2273:by taking the first derivative, yielding 1934: 1686:is a player partition of information set 1622:is (a special player called) nature, and 614: 54:in the form of chance events modeled as " 2117:of this game can be found by taking the 1968: 1960: 648: 379: 353: 290: 190:von Neumann–Morgenstern utility function 2891: 2722:Playing for real: a text on game theory 2716: 476:To more easily solve this game for the 260: 14: 4024: 747:. Through their actions, player 1 has 365:is a set of decision nodes such that: 2946: 2565:"Infinite Chess, PBS Infinite Series" 2481:{\displaystyle (q_{1}^{*},q_{2}^{*})} 965:is a finite tree with a set of nodes 284:what each player knows for every move 137:Each node of the Chance player has a 75:general definition was introduced by 2690: 754: 295:A game represented in extensive form 84: 1745:{\displaystyle \iota (v)=\iota (H)} 24: 3014:First-player and second-player win 2858: 1940: 1916: 1657: 1557: 1368: 1351: 1277: 1220: 913: 824: 777: 766: 704:, but then type 1 prefers to play 235:). Examples of such games include 25: 4043: 1253: 1204:{\displaystyle H\in \mathbf {H} } 1060: 3121:Coalition-proof Nash equilibrium 1852: 1694: 1634: 1361: 1197: 1152:called an information partition, 1118: 1101:{\displaystyle p:V\rightarrow D} 864: 801: 786: 743:and randomising if they observe 511:Player 2's Strategies: {U’ , D’} 267:Perfect and complete information 180:for a player thus consists of a 2925:Lectures on the theory of games 2115:subgame perfect Nash equilibria 2051:as the strategy they adopt and 449:when they have actually played 210:Shoham & Leyton-Brown (2009 44:choices at every decision point 3131:Evolutionarily stable strategy 2927:. Princeton University Press. 2724:. Oxford University Press US. 2652: 2619: 2586: 2475: 2439: 2186: 2173: 1929: 1904: 1890: 1840: 1836: 1824: 1821: 1818: 1812: 1739: 1733: 1724: 1718: 1645: 1629: 1525:the set of successor nodes of 1512: 1506: 1483: 1477: 1434: 1428: 1422: 1419: 1413: 1328: 1322: 1272: 1228:{\displaystyle {\mathcal {A}}} 1170: 1164: 1092: 1069:{\displaystyle D=V\setminus T} 849: 843: 831: 812: 796: 793: 692:, type 2 would prefer to play 508:Player 1's Strategies: {U , D} 13: 1: 3059:Simultaneous action selection 2533: 1956:is a payoff profile function. 482:, it can be converted to the 3996:List of games in game theory 3171:Quantal response equilibrium 3161:Perfect Bayesian equilibrium 3096:Bayes correlated equilibrium 2923:Harold William Kuhn (2003). 2659:Watson, Joel. (2013-05-09). 2626:Watson, Joel. (2013-05-09). 2593:Watson, Joel. (2013-05-09). 1701:{\displaystyle \mathbf {H} } 1602:is a finite set of players, 1125:{\displaystyle \mathbf {H} } 675:perfect Bayesian equilibrium 459:perfect Bayesian equilibrium 7: 3465:Optional prisoner's dilemma 3191:Self-confirming equilibrium 2513:Self-confirming equilibrium 2491: 453:so that player 2 will play 348:subgame perfect equilibrium 66:Finite extensive-form games 10: 4048: 3930:Principal variation search 3646:Aumann's agreement theorem 3309:Strategy-stealing argument 3216:Trembling hand equilibrium 3146:Markov perfect equilibrium 3141:Mertens-stable equilibrium 2837:Cambridge University Press 1037:{\displaystyle T\subset V} 1018:, a set of terminal nodes 1011:{\displaystyle v^{0}\in V} 438:and so player 2 will play 3966:Combinatorial game theory 3953: 3912: 3694: 3638: 3625:Princess and monster game 3420: 3322: 3224: 3176:Quasi-perfect equilibrium 3101:Bayesian Nash equilibrium 3082: 2981: 2702:. Vol. 1. Elsevier. 2508:Combinatorial game theory 225:combinatorial game theory 212:, chpt. 13) for details. 4032:Game theory game classes 3981:Evolutionary game theory 3714:Antoine Augustin Cournot 3600:Guess 2/3 of the average 3397:Strictly determined game 3186:Satisfaction equilibrium 3004:Escalation of commitment 2852:Downloadable free online 2119:first partial derivative 985:, a unique initial node 751:their type to player 2. 688:. However, if they play 141:over its outgoing edges. 139:probability distribution 38:is a specification of a 3986:Glossary of game theory 3585:Stackelberg competition 3206:Strong Nash equilibrium 2865:Horst Herrlich (2006). 2698:; Hart, Sergiu (eds.). 1987:Stackelberg competition 605:Stackelberg competition 342:and player 2 will play 229:artificial intelligence 219:two-player game over a 4011:Tragedy of the commons 3991:List of game theorists 3971:Confrontation analysis 3681:Sprague–Grundy theorem 3196:Sequential equilibrium 3116:Correlated equilibrium 2482: 2426: 2345: 2265: 2236: 2144: 2105: 2074: 2043: 2012: 1974: 1950: 1869: 1772: 1771:{\displaystyle v\in H} 1746: 1702: 1680: 1616: 1596: 1539: 1519: 1490: 1461: 1441: 1384: 1335: 1306: 1286: 1229: 1205: 1177: 1146: 1126: 1102: 1070: 1038: 1012: 979: 959: 895: 670:status). There is one 654: 626:incomplete information 615:Incomplete information 385: 296: 196:random outcome by its 52:incomplete information 3784:Jean-François Mertens 2895:Mathematische Annalen 2794:at many universities. 2483: 2427: 2346: 2266: 2264:{\displaystyle q_{1}} 2237: 2145: 2143:{\displaystyle q_{2}} 2106: 2104:{\displaystyle c_{2}} 2075: 2073:{\displaystyle c_{1}} 2044: 2042:{\displaystyle q_{2}} 2013: 2011:{\displaystyle q_{1}} 1972: 1961:Infinite action space 1951: 1870: 1773: 1747: 1703: 1681: 1617: 1597: 1540: 1520: 1496:is a bijection, with 1491: 1462: 1442: 1385: 1336: 1307: 1287: 1230: 1206: 1178: 1147: 1127: 1103: 1071: 1039: 1013: 980: 960: 896: 735:and player 2 playing 719:, player 2 will play 652: 461:where player 1 plays 422:, player 2 will play 414:, player 2 will play 391:imperfect information 383: 354:Imperfect information 326:, player 2 will play 294: 275:the players of a game 206:epistemic modal logic 3913:Search optimizations 3789:Jennifer Tour Chayes 3676:Revelation principle 3671:Purification theorem 3610:Nash bargaining game 3575:Bertrand competition 3560:El Farol Bar problem 3525:Electronic mail game 3490:Lewis signaling game 3029:Hierarchy of beliefs 2498:Axiom of determinacy 2436: 2355: 2277: 2248: 2160: 2127: 2088: 2057: 2026: 1995: 1881: 1784: 1756: 1712: 1690: 1626: 1606: 1552: 1529: 1518:{\displaystyle s(v)} 1500: 1489:{\displaystyle s(v)} 1471: 1451: 1394: 1348: 1334:{\displaystyle a(v)} 1316: 1296: 1241: 1215: 1187: 1176:{\displaystyle A(H)} 1158: 1136: 1114: 1080: 1048: 1022: 989: 969: 908: 763: 660:by the other players 3961:Bounded rationality 3580:Cournot competition 3530:Rock paper scissors 3505:Battle of the sexes 3495:Volunteer's dilemma 3367:Perfect information 3294:Dominant strategies 3126:Epsilon-equilibrium 3009:Extensive-form game 2597:. pp. 97–100. 2503:Perfect information 2474: 2456: 2372: 2294: 1312:to a single action 609:Cournot competition 516: 465:and player 2 plays 396:perfect information 217:perfect information 153:equivalence classes 36:extensive-form game 3940:Paranoid algorithm 3920:Alpha–beta pruning 3799:John Maynard Smith 3630:Rendezvous problem 3470:Traveler's dilemma 3460:Gift-exchange game 3455:Prisoner's dilemma 3372:Large Poisson game 3339:Bargaining problem 3239:Backward induction 3211:Subgame perfection 3166:Proper equilibrium 2908:10.1007/BF01448847 2790:2000-08-15 at the 2663:. pp. 22–26. 2630:. pp. 26–28. 2478: 2460: 2442: 2422: 2420: 2358: 2341: 2339: 2280: 2261: 2232: 2230: 2152:) and finding its 2140: 2101: 2070: 2039: 2008: 1975: 1946: 1865: 1768: 1742: 1698: 1676: 1612: 1592: 1535: 1515: 1486: 1457: 1437: 1390:, the restriction 1380: 1331: 1302: 1282: 1225: 1201: 1173: 1142: 1132:is a partition of 1122: 1098: 1066: 1034: 1008: 975: 955: 891: 655: 515: 488:. Given this is a 386: 322:If player 1 plays 297: 249:expectminimax tree 99:(rational) players 4019: 4018: 3925:Aspiration window 3894:Suzanne Scotchmer 3849:Oskar Morgenstern 3744:Donald B. Gillies 3686:Zermelo's theorem 3615:Induction puzzles 3570:Fair cake-cutting 3545:Public goods game 3475:Coordination game 3349:Intransitive game 3274:Forward induction 3156:Pareto efficiency 3136:Gibbs equilibrium 3106:Berge equilibrium 3054:Simultaneous game 2934:978-0-691-02772-2 2886:Historical papers 2876:978-3-540-30989-5 2846:978-0-521-89943-7 2779:978-1-59829-593-1 2731:978-0-19-530057-4 2709:978-0-444-88098-7 2670:978-0-393-91838-0 2637:978-0-393-91838-0 2604:978-0-393-91838-0 2419: 2338: 2229: 1615:{\displaystyle 0} 1538:{\displaystyle v} 1460:{\displaystyle a} 1305:{\displaystyle v} 1145:{\displaystyle D} 978:{\displaystyle V} 755:Formal definition 731:, type 2 playing 715:and type 2 plays 579: 578: 247:. A game over an 167:among the players 16:(Redirected from 4039: 4006:Topological game 4001:No-win situation 3899:Thomas Schelling 3879:Robert B. Wilson 3839:Merrill M. Flood 3809:John von Neumann 3719:Ariel Rubinstein 3704:Albert W. Tucker 3555:War of attrition 3515:Matching pennies 3289:Pairing strategy 3151:Nash equilibrium 3074:Mechanism design 3039:Normal-form game 2994:Cooperative game 2967: 2960: 2953: 2944: 2943: 2938: 2919: 2880: 2849: 2782: 2751:Fudenberg D and 2735: 2718:Binmore, Kenneth 2713: 2683: 2682: 2656: 2650: 2649: 2623: 2617: 2616: 2590: 2584: 2562: 2553: 2547: 2528:Solution concept 2487: 2485: 2484: 2479: 2473: 2468: 2455: 2450: 2431: 2429: 2428: 2423: 2421: 2415: 2414: 2413: 2398: 2397: 2378: 2371: 2366: 2350: 2348: 2347: 2342: 2340: 2334: 2333: 2332: 2317: 2316: 2300: 2293: 2288: 2272: 2270: 2268: 2267: 2262: 2260: 2259: 2241: 2239: 2238: 2233: 2231: 2225: 2224: 2223: 2211: 2210: 2194: 2185: 2184: 2172: 2171: 2151: 2149: 2147: 2146: 2141: 2139: 2138: 2112: 2110: 2108: 2107: 2102: 2100: 2099: 2081: 2079: 2077: 2076: 2071: 2069: 2068: 2050: 2048: 2046: 2045: 2040: 2038: 2037: 2019: 2017: 2015: 2014: 2009: 2007: 2006: 1955: 1953: 1952: 1947: 1945: 1944: 1943: 1937: 1922: 1921: 1920: 1919: 1902: 1901: 1874: 1872: 1871: 1866: 1861: 1860: 1855: 1843: 1805: 1804: 1777: 1775: 1774: 1769: 1751: 1749: 1748: 1743: 1707: 1705: 1704: 1699: 1697: 1685: 1683: 1682: 1677: 1675: 1674: 1661: 1660: 1643: 1642: 1637: 1621: 1619: 1618: 1613: 1601: 1599: 1598: 1593: 1561: 1560: 1544: 1542: 1541: 1536: 1524: 1522: 1521: 1516: 1495: 1493: 1492: 1487: 1466: 1464: 1463: 1458: 1446: 1444: 1443: 1438: 1406: 1405: 1389: 1387: 1386: 1381: 1364: 1340: 1338: 1337: 1332: 1311: 1309: 1308: 1303: 1291: 1289: 1288: 1283: 1281: 1280: 1268: 1267: 1234: 1232: 1231: 1226: 1224: 1223: 1210: 1208: 1207: 1202: 1200: 1182: 1180: 1179: 1174: 1151: 1149: 1148: 1143: 1131: 1129: 1128: 1123: 1121: 1107: 1105: 1104: 1099: 1075: 1073: 1072: 1067: 1043: 1041: 1040: 1035: 1017: 1015: 1014: 1009: 1001: 1000: 984: 982: 981: 976: 964: 962: 961: 956: 939: 938: 917: 916: 900: 898: 897: 892: 869: 868: 867: 830: 829: 828: 827: 810: 809: 804: 789: 781: 780: 739:if they observe 711:If type 1 plays 517: 514: 479:Nash equilibrium 165:common knowledge 146:information sets 95:A finite set of 46:, the (possibly 21: 4047: 4046: 4042: 4041: 4040: 4038: 4037: 4036: 4022: 4021: 4020: 4015: 3949: 3935:max^n algorithm 3908: 3904:William Vickrey 3864:Reinhard Selten 3819:Kenneth Binmore 3734:David K. Levine 3729:Daniel Kahneman 3696: 3690: 3666:Negamax theorem 3656:Minimax theorem 3634: 3595:Diner's dilemma 3450:All-pay auction 3416: 3402:Stochastic game 3354:Mean-field game 3325: 3318: 3284:Markov strategy 3220: 3086: 3078: 3049:Sequential game 3034:Information set 3019:Game complexity 2989:Congestion game 2977: 2971: 2935: 2877: 2867:Axiom of choice 2861: 2859:Further reading 2847: 2814:Osborne MJ and 2792:Wayback Machine 2780: 2732: 2710: 2687: 2686: 2671: 2657: 2653: 2638: 2624: 2620: 2605: 2591: 2587: 2563: 2556: 2548: 2541: 2536: 2518:Sequential game 2494: 2469: 2464: 2451: 2446: 2437: 2434: 2433: 2409: 2405: 2393: 2389: 2379: 2376: 2367: 2362: 2356: 2353: 2352: 2328: 2324: 2312: 2308: 2301: 2298: 2289: 2284: 2278: 2275: 2274: 2255: 2251: 2249: 2246: 2245: 2243: 2219: 2215: 2206: 2202: 2195: 2192: 2180: 2176: 2167: 2163: 2161: 2158: 2157: 2134: 2130: 2128: 2125: 2124: 2122: 2095: 2091: 2089: 2086: 2085: 2083: 2064: 2060: 2058: 2055: 2054: 2052: 2033: 2029: 2027: 2024: 2023: 2021: 2002: 1998: 1996: 1993: 1992: 1990: 1963: 1939: 1938: 1933: 1932: 1915: 1914: 1907: 1903: 1897: 1893: 1882: 1879: 1878: 1856: 1851: 1850: 1839: 1800: 1796: 1785: 1782: 1781: 1757: 1754: 1753: 1713: 1710: 1709: 1693: 1691: 1688: 1687: 1656: 1655: 1648: 1644: 1638: 1633: 1632: 1627: 1624: 1623: 1607: 1604: 1603: 1556: 1555: 1553: 1550: 1549: 1530: 1527: 1526: 1501: 1498: 1497: 1472: 1469: 1468: 1452: 1449: 1448: 1401: 1397: 1395: 1392: 1391: 1360: 1349: 1346: 1345: 1317: 1314: 1313: 1297: 1294: 1293: 1276: 1275: 1263: 1259: 1242: 1239: 1238: 1219: 1218: 1216: 1213: 1212: 1196: 1188: 1185: 1184: 1159: 1156: 1155: 1137: 1134: 1133: 1117: 1115: 1112: 1111: 1081: 1078: 1077: 1049: 1046: 1045: 1023: 1020: 1019: 996: 992: 990: 987: 986: 970: 967: 966: 934: 930: 912: 911: 909: 906: 905: 863: 856: 852: 823: 822: 815: 811: 805: 800: 799: 785: 776: 775: 764: 761: 760: 757: 639:nature's choice 617: 525: 522: 362:information set 356: 269: 251:, like that of 223:(as defined in 68: 56:moves by nature 28: 23: 22: 15: 12: 11: 5: 4045: 4035: 4034: 4017: 4016: 4014: 4013: 4008: 4003: 3998: 3993: 3988: 3983: 3978: 3973: 3968: 3963: 3957: 3955: 3951: 3950: 3948: 3947: 3942: 3937: 3932: 3927: 3922: 3916: 3914: 3910: 3909: 3907: 3906: 3901: 3896: 3891: 3886: 3881: 3876: 3871: 3869:Robert Axelrod 3866: 3861: 3856: 3851: 3846: 3844:Olga Bondareva 3841: 3836: 3834:Melvin Dresher 3831: 3826: 3824:Leonid Hurwicz 3821: 3816: 3811: 3806: 3801: 3796: 3791: 3786: 3781: 3776: 3771: 3766: 3761: 3759:Harold W. Kuhn 3756: 3751: 3749:Drew Fudenberg 3746: 3741: 3739:David M. Kreps 3736: 3731: 3726: 3724:Claude Shannon 3721: 3716: 3711: 3706: 3700: 3698: 3692: 3691: 3689: 3688: 3683: 3678: 3673: 3668: 3663: 3661:Nash's theorem 3658: 3653: 3648: 3642: 3640: 3636: 3635: 3633: 3632: 3627: 3622: 3617: 3612: 3607: 3602: 3597: 3592: 3587: 3582: 3577: 3572: 3567: 3562: 3557: 3552: 3547: 3542: 3537: 3532: 3527: 3522: 3520:Ultimatum game 3517: 3512: 3507: 3502: 3500:Dollar auction 3497: 3492: 3487: 3485:Centipede game 3482: 3477: 3472: 3467: 3462: 3457: 3452: 3447: 3442: 3440:Infinite chess 3437: 3432: 3426: 3424: 3418: 3417: 3415: 3414: 3409: 3407:Symmetric game 3404: 3399: 3394: 3392:Signaling game 3389: 3387:Screening game 3384: 3379: 3377:Potential game 3374: 3369: 3364: 3356: 3351: 3346: 3341: 3336: 3330: 3328: 3320: 3319: 3317: 3316: 3311: 3306: 3304:Mixed strategy 3301: 3296: 3291: 3286: 3281: 3276: 3271: 3266: 3261: 3256: 3251: 3246: 3241: 3236: 3230: 3228: 3222: 3221: 3219: 3218: 3213: 3208: 3203: 3198: 3193: 3188: 3183: 3181:Risk dominance 3178: 3173: 3168: 3163: 3158: 3153: 3148: 3143: 3138: 3133: 3128: 3123: 3118: 3113: 3108: 3103: 3098: 3092: 3090: 3080: 3079: 3077: 3076: 3071: 3066: 3061: 3056: 3051: 3046: 3041: 3036: 3031: 3026: 3024:Graphical game 3021: 3016: 3011: 3006: 3001: 2996: 2991: 2985: 2983: 2979: 2978: 2970: 2969: 2962: 2955: 2947: 2941: 2940: 2933: 2920: 2883: 2882: 2875: 2860: 2857: 2856: 2855: 2845: 2826: 2812: 2795: 2778: 2763: 2749: 2736: 2730: 2714: 2708: 2696:Aumann, Robert 2685: 2684: 2669: 2651: 2636: 2618: 2603: 2585: 2554: 2538: 2537: 2535: 2532: 2531: 2530: 2525: 2520: 2515: 2510: 2505: 2500: 2493: 2490: 2477: 2472: 2467: 2463: 2459: 2454: 2449: 2445: 2441: 2418: 2412: 2408: 2404: 2401: 2396: 2392: 2388: 2385: 2382: 2375: 2370: 2365: 2361: 2337: 2331: 2327: 2323: 2320: 2315: 2311: 2307: 2304: 2297: 2292: 2287: 2283: 2258: 2254: 2228: 2222: 2218: 2214: 2209: 2205: 2201: 2198: 2191: 2188: 2183: 2179: 2175: 2170: 2166: 2137: 2133: 2098: 2094: 2067: 2063: 2036: 2032: 2005: 2001: 1962: 1959: 1958: 1957: 1942: 1936: 1931: 1928: 1925: 1918: 1913: 1910: 1906: 1900: 1896: 1892: 1889: 1886: 1876: 1864: 1859: 1854: 1849: 1846: 1842: 1838: 1835: 1832: 1829: 1826: 1823: 1820: 1817: 1814: 1811: 1808: 1803: 1799: 1795: 1792: 1789: 1779: 1767: 1764: 1761: 1741: 1738: 1735: 1732: 1729: 1726: 1723: 1720: 1717: 1696: 1673: 1670: 1667: 1664: 1659: 1654: 1651: 1647: 1641: 1636: 1631: 1611: 1591: 1588: 1585: 1582: 1579: 1576: 1573: 1570: 1567: 1564: 1559: 1534: 1514: 1511: 1508: 1505: 1485: 1482: 1479: 1476: 1456: 1436: 1433: 1430: 1427: 1424: 1421: 1418: 1415: 1412: 1409: 1404: 1400: 1379: 1376: 1373: 1370: 1367: 1363: 1359: 1356: 1353: 1343: 1342: 1330: 1327: 1324: 1321: 1301: 1279: 1274: 1271: 1266: 1262: 1258: 1255: 1252: 1249: 1246: 1236: 1222: 1199: 1195: 1192: 1172: 1169: 1166: 1163: 1153: 1141: 1120: 1109: 1097: 1094: 1091: 1088: 1085: 1065: 1062: 1059: 1056: 1053: 1033: 1030: 1027: 1007: 1004: 999: 995: 974: 954: 951: 948: 945: 942: 937: 933: 929: 926: 923: 920: 915: 890: 887: 884: 881: 878: 875: 872: 866: 862: 859: 855: 851: 848: 845: 842: 839: 836: 833: 826: 821: 818: 814: 808: 803: 798: 795: 792: 788: 784: 779: 774: 771: 768: 756: 753: 634:transformation 616: 613: 596: 595: 592: 589: 586: 577: 576: 567: 554: 550: 549: 540: 537: 533: 532: 529: 526: 523: 520: 513: 512: 509: 394:. A game with 375: 374: 370: 355: 352: 346:. This is the 289: 288: 285: 282: 279: 276: 268: 265: 245:infinite chess 169: 168: 161: 160: 159: 156: 142: 135: 124: 110: 100: 77:Harold W. Kuhn 67: 64: 26: 18:Extensive form 9: 6: 4: 3: 2: 4044: 4033: 4030: 4029: 4027: 4012: 4009: 4007: 4004: 4002: 3999: 3997: 3994: 3992: 3989: 3987: 3984: 3982: 3979: 3977: 3974: 3972: 3969: 3967: 3964: 3962: 3959: 3958: 3956: 3954:Miscellaneous 3952: 3946: 3943: 3941: 3938: 3936: 3933: 3931: 3928: 3926: 3923: 3921: 3918: 3917: 3915: 3911: 3905: 3902: 3900: 3897: 3895: 3892: 3890: 3889:Samuel Bowles 3887: 3885: 3884:Roger Myerson 3882: 3880: 3877: 3875: 3874:Robert Aumann 3872: 3870: 3867: 3865: 3862: 3860: 3857: 3855: 3852: 3850: 3847: 3845: 3842: 3840: 3837: 3835: 3832: 3830: 3829:Lloyd Shapley 3827: 3825: 3822: 3820: 3817: 3815: 3814:Kenneth Arrow 3812: 3810: 3807: 3805: 3802: 3800: 3797: 3795: 3794:John Harsanyi 3792: 3790: 3787: 3785: 3782: 3780: 3777: 3775: 3772: 3770: 3767: 3765: 3764:Herbert Simon 3762: 3760: 3757: 3755: 3752: 3750: 3747: 3745: 3742: 3740: 3737: 3735: 3732: 3730: 3727: 3725: 3722: 3720: 3717: 3715: 3712: 3710: 3707: 3705: 3702: 3701: 3699: 3693: 3687: 3684: 3682: 3679: 3677: 3674: 3672: 3669: 3667: 3664: 3662: 3659: 3657: 3654: 3652: 3649: 3647: 3644: 3643: 3641: 3637: 3631: 3628: 3626: 3623: 3621: 3618: 3616: 3613: 3611: 3608: 3606: 3603: 3601: 3598: 3596: 3593: 3591: 3588: 3586: 3583: 3581: 3578: 3576: 3573: 3571: 3568: 3566: 3565:Fair division 3563: 3561: 3558: 3556: 3553: 3551: 3548: 3546: 3543: 3541: 3540:Dictator game 3538: 3536: 3533: 3531: 3528: 3526: 3523: 3521: 3518: 3516: 3513: 3511: 3508: 3506: 3503: 3501: 3498: 3496: 3493: 3491: 3488: 3486: 3483: 3481: 3478: 3476: 3473: 3471: 3468: 3466: 3463: 3461: 3458: 3456: 3453: 3451: 3448: 3446: 3443: 3441: 3438: 3436: 3433: 3431: 3428: 3427: 3425: 3423: 3419: 3413: 3412:Zero-sum game 3410: 3408: 3405: 3403: 3400: 3398: 3395: 3393: 3390: 3388: 3385: 3383: 3382:Repeated game 3380: 3378: 3375: 3373: 3370: 3368: 3365: 3363: 3361: 3357: 3355: 3352: 3350: 3347: 3345: 3342: 3340: 3337: 3335: 3332: 3331: 3329: 3327: 3321: 3315: 3312: 3310: 3307: 3305: 3302: 3300: 3299:Pure strategy 3297: 3295: 3292: 3290: 3287: 3285: 3282: 3280: 3277: 3275: 3272: 3270: 3267: 3265: 3262: 3260: 3259:De-escalation 3257: 3255: 3252: 3250: 3247: 3245: 3242: 3240: 3237: 3235: 3232: 3231: 3229: 3227: 3223: 3217: 3214: 3212: 3209: 3207: 3204: 3202: 3201:Shapley value 3199: 3197: 3194: 3192: 3189: 3187: 3184: 3182: 3179: 3177: 3174: 3172: 3169: 3167: 3164: 3162: 3159: 3157: 3154: 3152: 3149: 3147: 3144: 3142: 3139: 3137: 3134: 3132: 3129: 3127: 3124: 3122: 3119: 3117: 3114: 3112: 3109: 3107: 3104: 3102: 3099: 3097: 3094: 3093: 3091: 3089: 3085: 3081: 3075: 3072: 3070: 3069:Succinct game 3067: 3065: 3062: 3060: 3057: 3055: 3052: 3050: 3047: 3045: 3042: 3040: 3037: 3035: 3032: 3030: 3027: 3025: 3022: 3020: 3017: 3015: 3012: 3010: 3007: 3005: 3002: 3000: 2997: 2995: 2992: 2990: 2987: 2986: 2984: 2980: 2976: 2968: 2963: 2961: 2956: 2954: 2949: 2948: 2945: 2936: 2930: 2926: 2921: 2917: 2913: 2909: 2905: 2901: 2897: 2896: 2890: 2889: 2888: 2887: 2878: 2872: 2868: 2863: 2862: 2853: 2848: 2842: 2838: 2834: 2833: 2827: 2825: 2824:0-262-65040-1 2821: 2817: 2816:Rubinstein A. 2813: 2811: 2810:0-486-65943-7 2807: 2803: 2799: 2796: 2793: 2789: 2786: 2781: 2775: 2771: 2770: 2764: 2762: 2761:0-262-06141-4 2758: 2754: 2750: 2748: 2747:0-486-64216-X 2744: 2740: 2737: 2733: 2727: 2723: 2719: 2715: 2711: 2705: 2701: 2697: 2693: 2689: 2688: 2680: 2676: 2672: 2666: 2662: 2655: 2647: 2643: 2639: 2633: 2629: 2622: 2614: 2610: 2606: 2600: 2596: 2589: 2582: 2578: 2574: 2570: 2566: 2561: 2559: 2551: 2546: 2544: 2539: 2529: 2526: 2524: 2521: 2519: 2516: 2514: 2511: 2509: 2506: 2504: 2501: 2499: 2496: 2495: 2489: 2470: 2465: 2461: 2457: 2452: 2447: 2443: 2416: 2410: 2406: 2402: 2399: 2394: 2390: 2386: 2383: 2380: 2373: 2368: 2363: 2359: 2335: 2329: 2325: 2321: 2318: 2313: 2309: 2305: 2302: 2295: 2290: 2285: 2281: 2256: 2252: 2226: 2220: 2216: 2212: 2207: 2203: 2199: 2196: 2189: 2181: 2177: 2168: 2164: 2155: 2154:best response 2135: 2131: 2120: 2116: 2096: 2092: 2065: 2061: 2034: 2030: 2003: 1999: 1988: 1984: 1980: 1971: 1967: 1926: 1923: 1911: 1908: 1898: 1894: 1887: 1884: 1877: 1857: 1847: 1844: 1833: 1830: 1827: 1815: 1809: 1806: 1801: 1797: 1790: 1787: 1780: 1765: 1762: 1759: 1736: 1730: 1727: 1721: 1715: 1668: 1662: 1652: 1649: 1639: 1609: 1586: 1583: 1580: 1577: 1574: 1571: 1568: 1562: 1548: 1547: 1546: 1532: 1509: 1503: 1480: 1474: 1454: 1431: 1425: 1416: 1410: 1407: 1402: 1398: 1377: 1374: 1371: 1365: 1357: 1354: 1341:, fulfilling: 1325: 1319: 1299: 1264: 1260: 1250: 1247: 1244: 1237: 1193: 1190: 1167: 1161: 1154: 1139: 1110: 1095: 1089: 1086: 1083: 1063: 1057: 1054: 1051: 1031: 1028: 1025: 1005: 1002: 997: 993: 972: 949: 946: 943: 940: 935: 931: 927: 924: 918: 904: 903: 902: 885: 882: 879: 876: 873: 870: 860: 857: 846: 840: 834: 819: 816: 806: 790: 782: 769: 752: 750: 746: 742: 738: 734: 730: 726: 722: 718: 714: 709: 707: 703: 699: 695: 691: 687: 683: 678: 676: 673: 669: 663: 661: 651: 647: 645: 641: 640: 635: 633: 628: 627: 622: 612: 610: 606: 600: 593: 590: 587: 584: 583: 582: 574: 573: 568: 566: 564: 560: 555: 552: 551: 547: 546: 541: 538: 535: 534: 530: 527: 519: 518: 510: 507: 506: 505: 503: 502: 497: 496: 492: 487: 486: 481: 480: 474: 472: 468: 464: 460: 456: 452: 448: 443: 441: 437: 433: 429: 425: 421: 417: 413: 409: 403: 401: 397: 393: 392: 382: 378: 371: 368: 367: 366: 364: 363: 351: 349: 345: 341: 337: 333: 329: 325: 320: 318: 314: 310: 306: 301: 293: 286: 283: 280: 277: 274: 273: 272: 264: 262: 258: 254: 250: 246: 242: 238: 234: 230: 226: 222: 218: 213: 211: 207: 201: 199: 195: 191: 187: 183: 179: 178:pure strategy 175: 166: 162: 157: 154: 150: 149: 147: 143: 140: 136: 133: 129: 125: 122: 118: 116: 111: 109: 106:, called the 105: 101: 98: 94: 93: 92: 90: 86: 82: 78: 73: 63: 61: 57: 53: 49: 45: 41: 37: 33: 19: 3859:Peyton Young 3854:Paul Milgrom 3769:HervĂ© Moulin 3709:Amos Tversky 3651:Folk theorem 3362:-player game 3359: 3279:Grim trigger 3008: 2924: 2899: 2893: 2885: 2884: 2869:. Springer. 2866: 2835:, New York: 2831: 2768: 2721: 2699: 2692:Hart, Sergiu 2660: 2654: 2627: 2621: 2594: 2588: 1976: 1964: 1344: 758: 744: 740: 736: 732: 728: 724: 720: 716: 712: 710: 705: 701: 697: 693: 689: 685: 681: 679: 671: 664: 659: 656: 644:God's choice 643: 637: 630: 624: 620: 618: 601: 597: 580: 571: 570: 562: 558: 556: 544: 543: 499: 491:simultaneous 489: 483: 477: 475: 470: 466: 462: 454: 450: 446: 444: 439: 435: 431: 427: 423: 419: 415: 411: 408:ad infinitum 407: 404: 395: 389: 387: 376: 360: 357: 343: 339: 335: 331: 327: 323: 321: 316: 312: 308: 304: 302: 298: 270: 261:Binmore 2007 214: 202: 170: 131: 120: 114: 107: 96: 88: 69: 35: 29: 3976:Coopetition 3779:Jean Tirole 3774:John Conway 3754:Eric Maskin 3550:Blotto game 3535:Pirate game 3344:Global game 3314:Tit for tat 3244:Bid shading 3234:Appeasement 3084:Equilibrium 3064:Solved game 2999:Determinacy 2982:Definitions 2975:game theory 2902:: 295–320. 2785:Free online 1979:real number 531:Down' (D') 485:normal form 263:, chpt. 2) 237:tic-tac-toe 174:realization 104:rooted tree 85:Hart (1992) 81:von Neumann 60:normal-form 32:game theory 3620:Trust game 3605:Kuhn poker 3269:Escalation 3264:Deterrence 3254:Cheap talk 3226:Strategies 3044:Preference 2973:Topics of 2739:Dresher M. 2679:1123193808 2646:1123193808 2613:1123193808 2581:1510.08155 2534:References 2523:Signalling 2156:function, 672:separating 501:strategies 495:sequential 253:backgammon 186:singletons 3804:John Nash 3510:Stag hunt 3249:Collusion 2916:122961988 2802:Raiffa H. 2798:Luce R.D. 2753:Tirole J. 2573:1302.4377 2471:∗ 2453:∗ 2400:− 2369:∗ 2319:− 2291:∗ 2213:− 2200:− 1930:→ 1912:∈ 1848:∈ 1822:→ 1798:ρ 1788:ρ 1763:∈ 1731:ι 1716:ι 1663:∪ 1653:∈ 1423:→ 1375:∈ 1369:∀ 1358:∈ 1352:∀ 1273:→ 1254:∖ 1194:∈ 1093:→ 1061:∖ 1029:⊂ 1003:∈ 953:⟩ 922:⟨ 889:⟩ 880:ρ 861:∈ 820:∈ 773:⟨ 767:Γ 749:signalled 553:Down (D) 528:Up' (U') 524:Player 1 400:singleton 221:game tree 200:utility. 182:selection 128:partition 108:game tree 72:game tree 48:imperfect 4026:Category 3945:Lazy SMP 3639:Theorems 3590:Deadlock 3445:Checkers 3326:of games 3088:concepts 2788:Archived 2720:(2007). 2492:See also 632:Harsanyi 521:Player 2 373:reached. 198:expected 194:a priori 3697:figures 3480:Chicken 3334:Auction 3324:Classes 2271:⁠ 2244:⁠ 2150:⁠ 2123:⁠ 2111:⁠ 2084:⁠ 2080:⁠ 2053:⁠ 2049:⁠ 2022:⁠ 2018:⁠ 1991:⁠ 1983:integer 901:where: 668:subgame 536:Up (U) 121:payoffs 2931:  2914:  2873:  2843:  2822:  2808:  2776:  2759:  2745:  2728:  2706:  2677:  2667:  2644:  2634:  2611:  2601:  1708:. Let 539:(0,0) 243:, and 208:; see 117:-tuple 3435:Chess 3422:Games 2912:S2CID 2577:arXiv 2569:arXiv 1044:(let 257:poker 241:chess 87:, an 34:, an 3111:Core 2929:ISBN 2871:ISBN 2841:ISBN 2820:ISBN 2806:ISBN 2800:and 2774:ISBN 2757:ISBN 2743:ISBN 2726:ISBN 2704:ISBN 2675:OCLC 2665:ISBN 2642:OCLC 2632:ISBN 2609:OCLC 2599:ISBN 2575:and 2432:and 2381:5000 2303:5000 2197:5000 2082:and 2020:and 621:type 575:,1) 315:and 307:and 233:draw 227:and 40:game 3695:Key 2904:doi 2900:100 1467:on 1447:of 737:U' 721:D' 702:D' 690:D' 686:D' 642:or 542:(2, 467:U' 455:D' 440:D' 432:D' 424:U' 416:D' 344:D' 336:D' 328:U' 317:D' 313:U' 119:of 30:In 4028:: 3430:Go 2910:. 2898:. 2839:, 2673:. 2640:. 2607:. 2557:^ 2542:^ 1545:. 708:. 611:. 548:) 504:. 442:. 430:, 350:. 239:, 215:A 126:A 102:A 3360:n 2966:e 2959:t 2952:v 2937:. 2918:. 2906:: 2879:. 2854:. 2734:. 2712:. 2681:. 2648:. 2615:. 2583:. 2579:: 2571:: 2476:) 2466:2 2462:q 2458:, 2448:1 2444:q 2440:( 2417:4 2411:2 2407:c 2403:3 2395:1 2391:c 2387:2 2384:+ 2374:= 2364:2 2360:q 2336:2 2330:1 2326:c 2322:2 2314:2 2310:c 2306:+ 2296:= 2286:1 2282:q 2257:1 2253:q 2227:2 2221:2 2217:c 2208:1 2204:q 2190:= 2187:) 2182:1 2178:q 2174:( 2169:2 2165:q 2136:2 2132:q 2097:2 2093:c 2066:1 2062:c 2035:2 2031:q 2004:1 2000:q 1941:I 1935:R 1927:T 1924:: 1917:I 1909:i 1905:) 1899:i 1895:u 1891:( 1888:= 1885:u 1863:} 1858:0 1853:H 1845:H 1841:| 1837:] 1834:1 1831:, 1828:0 1825:[ 1819:) 1816:H 1813:( 1810:A 1807:: 1802:H 1794:{ 1791:= 1778:. 1766:H 1760:v 1740:) 1737:H 1734:( 1728:= 1725:) 1722:v 1719:( 1695:H 1672:} 1669:0 1666:{ 1658:I 1650:i 1646:) 1640:i 1635:H 1630:( 1610:0 1590:} 1587:I 1584:, 1581:. 1578:. 1575:. 1572:, 1569:1 1566:{ 1563:= 1558:I 1533:v 1513:) 1510:v 1507:( 1504:s 1484:) 1481:v 1478:( 1475:s 1455:a 1435:) 1432:H 1429:( 1426:A 1420:) 1417:v 1414:( 1411:s 1408:: 1403:v 1399:a 1378:H 1372:v 1366:, 1362:H 1355:H 1329:) 1326:v 1323:( 1320:a 1300:v 1278:A 1270:} 1265:0 1261:v 1257:{ 1251:V 1248:: 1245:a 1235:. 1221:A 1198:H 1191:H 1171:) 1168:H 1165:( 1162:A 1140:D 1119:H 1096:D 1090:V 1087:: 1084:p 1064:T 1058:V 1055:= 1052:D 1032:V 1026:T 1006:V 998:0 994:v 973:V 950:p 947:, 944:T 941:, 936:0 932:v 928:, 925:V 919:= 914:K 886:u 883:, 877:, 874:a 871:, 865:H 858:H 854:} 850:) 847:H 844:( 841:A 838:{ 835:, 832:] 825:I 817:i 813:) 807:i 802:H 797:( 794:[ 791:, 787:H 783:, 778:K 770:= 745:U 741:D 733:U 729:D 725:D 717:D 713:U 706:D 698:U 694:U 682:D 572:3 569:( 565:) 563:2 561:, 559:1 557:( 545:1 493:/ 471:D 463:D 451:D 447:U 436:U 428:U 420:D 412:U 340:U 332:U 324:D 309:D 305:U 132:n 115:n 97:n 89:n 20:)

Index

Extensive form
game theory
game
choices at every decision point
imperfect
incomplete information
moves by nature
normal-form
game tree
Harold W. Kuhn
von Neumann
Hart (1992)
rooted tree
n-tuple
partition
probability distribution
information sets
equivalence classes
common knowledge
realization
pure strategy
selection
singletons
von Neumann–Morgenstern utility function
a priori
expected
epistemic modal logic
Shoham & Leyton-Brown (2009
perfect information
game tree

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