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Extensive-form game

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635:. 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. 647:
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
123:+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.) 591:
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
308:. 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). 888: 654:
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
1943: 2231:. 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 1862: 1673: 462:. 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. 1279: 587:
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).
673:, 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 2229: 161:
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.
2338: 1377: 39:) 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 2870:, 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) 140:
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.
651:. In the case of private information, every player knows what has been played by nature. Information sets are represented as before by broken lines. 173:—choosing precisely one class of outgoing edges for every information set (of his). In a game of perfect information, the information sets are 434:
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
415:(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 ( 1772: 596:
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
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has both moves of chance (the cards being dealt) and imperfect information (the cards secretly held by other players). (
177:. It's less evident how payoffs should be interpreted in games with Chance nodes. It is assumed that each player has a 3199: 3179: 2928:
contains Kuhn's lectures at Princeton from 1952 (officially unpublished previously, but in circulation as photocopies)
2501: 336: 3664: 3913: 3634: 3292: 3134: 3129: 2825: 3949: 3872: 3608: 3164: 3089: 2946: 2496: 689:, player 2 again forms the belief that they are at either node with probability 1/2. In this case player 2 plays 213: 162: 1540: 1382: 3964: 3697: 3583: 3380: 3174: 2992: 153: 127: 59:
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
3969: 3568: 3538: 3194: 2982: 1975: 618:. In extensive form it is represented as a game with complete but imperfect information using the so-called 388: 217: 174: 3903: 2424: 883:{\displaystyle \Gamma =\langle {\mathcal {K}},\mathbf {H} ,,\{A(H)\}_{H\in \mathbf {H} },a,\rho ,u\rangle } 244:, has no imperfect information (all information sets are singletons) but has moves of chance. For example, 3994: 3974: 3954: 3573: 3478: 3337: 3287: 3282: 3214: 3184: 3104: 3032: 2773: 614: 489: 369: 40: 2807:
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
144:, each class representing a possible choice for a player's move at some point—, and 1938:{\displaystyle u=(u_{i})_{i\in {\mathcal {I}}}:T\rightarrow \mathbb {R} ^{\mathcal {I}}} 638: 3827: 3817: 3807: 3742: 3732: 3722: 3707: 3503: 3483: 3468: 3463: 3423: 3390: 3375: 3370: 3360: 3169: 2786: 2727: 1594: 1517: 1439: 1284: 1124: 957: 627: 233: 186: 65: 1958: 4009: 3867: 3857: 3812: 3797: 3777: 3603: 3548: 3523: 3395: 3365: 3355: 3342: 3247: 3189: 3124: 3057: 2904: 2790: 2684: 2142: 1966:
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 (
280: 221: 220:) can be represented as an extensive form game with outcomes (i.e. win, lose, or 3959: 3762: 3757: 3737: 3533: 3518: 3327: 3297: 3232: 3222: 3052: 2987: 2963: 2741: 2680: 2556:
PBS Infinite Series. Perfect information defined at 0:25, with academic sources
1967: 225: 92: 20: 399:), play in the first game will be as follows: player 1 knows that if they play 112:, meaning there is one payoff for each player at the end of every possible play 3588: 3242: 2840: 2667: 2634: 2601: 2553: 642:
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
2744:(1991) Game theory (Ch3 Extensive form games, pp67–106). MIT press. 666:; i.e. an equilibrium in which different types do different things. 2569: 446:
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
300:; player 2 observes player 1's choice and then chooses between 2772:. An 88-page mathematical introduction; see Chapters 4 and 5. 2756: 423:) because player 1 prefers to receive 2 to 1 and so will play 1978:. The payoffs to the firms are represented on the left, with 1929: 1905: 1646: 1546: 1266: 1209: 902: 813: 766: 80:-player extensive-form game thus consists of the following: 2881:
Neumann, J. (1928). "Zur Theorie der Gesellschaftsspiele".
2224:{\displaystyle q_{2}(q_{1})={\tfrac {5000-q_{1}-c_{2}}{2}}} 625:. This transformation introduces to the game the notion of 2414:{\displaystyle q_{2}^{*}={\tfrac {5000+2c_{1}-3c_{2}}{4}}} 2102:
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
947:{\displaystyle {\mathcal {K}}=\langle V,v^{0},T,p\rangle } 2333:{\displaystyle q_{1}^{*}={\tfrac {5000+c_{2}-2c_{1}}{2}}} 748:
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
2683:(1992). "Games in extensive and strategic forms". In 2427: 2346: 2340:. Feeding this into firm 2's best response function, 2268: 2239: 2151: 2118: 2079: 2048: 2017: 1986: 1872: 1775: 1747: 1703: 1681: 1617: 1597: 1543: 1520: 1491: 1462: 1442: 1385: 1339: 1307: 1287: 1232: 1206: 1178: 1149: 1127: 1105: 1071: 1039: 1013: 980: 960: 899: 754: 2761:, San Rafael, CA: Morgan & Claypool Publishers, 716:. The only equilibrium hence is with type 1 playing 685:. This cannot be an equilibrium. If both types play 267:
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)
2689:Handbook of Game Theory with Economic Applications 2469: 2413: 2332: 2252: 2223: 2131: 2092: 2061: 2030: 1999: 1937: 1856: 1759: 1733: 1689: 1667: 1603: 1583: 1526: 1506: 1477: 1448: 1428: 1371: 1322: 1293: 1273: 1216: 1200:which forms a partition on the set of all actions 1192: 1164: 1133: 1113: 1089: 1057: 1025: 999: 966: 946: 882: 198: 101:Each terminal (leaf) node of the game tree has an 2549: 2547: 2534: 2532: 1097:on which the rules of the game are represented, 68:in 1953, who extended an earlier definition of 2650:Strategy : an introduction to game theory 2617:Strategy : an introduction to game theory 2584:Strategy : an introduction to game theory 487:game, player one and player two each have two 270:what each player can do at each of their moves 119:of the non-terminal nodes of the game tree in 47:". Extensive-form representations differ from 2947: 1741:be a single player that makes a move at node 1281:is an action partition associating each node 323:, player 2 maximises their payoff by playing 8: 1851: 1782: 1660: 1654: 1578: 1554: 1258: 1245: 941: 910: 877: 842: 826: 761: 358:Every node in the set belongs to one player. 612:their opponents are. This sort of game has 193:decision". These can be made precise using 72:from 1928. Following the presentation from 2954: 2940: 2932: 2818:Shoham, Yoav; Leyton-Brown, Kevin (2009), 2755:Leyton-Brown, Kevin; Shoham, Yoav (2008), 1584:{\displaystyle {\mathcal {I}}=\{1,...,I\}} 1429:{\displaystyle a_{v}:s(v)\rightarrow A(H)} 2477:is the subgame perfect Nash equilibrium. 2458: 2453: 2440: 2435: 2426: 2398: 2382: 2365: 2356: 2351: 2345: 2317: 2301: 2287: 2278: 2273: 2267: 2262:by taking the first derivative, yielding 2244: 2238: 2208: 2195: 2181: 2169: 2156: 2150: 2123: 2117: 2084: 2078: 2053: 2047: 2022: 2016: 1991: 1985: 1928: 1927: 1923: 1922: 1904: 1903: 1896: 1886: 1871: 1845: 1840: 1828: 1789: 1774: 1746: 1702: 1682: 1680: 1675:is a player partition of information set 1645: 1644: 1637: 1627: 1622: 1616: 1611:is (a special player called) nature, and 1596: 1545: 1544: 1542: 1519: 1490: 1461: 1441: 1390: 1384: 1349: 1338: 1306: 1286: 1265: 1264: 1252: 1231: 1208: 1207: 1205: 1185: 1177: 1148: 1126: 1106: 1104: 1070: 1038: 1012: 985: 979: 959: 923: 901: 900: 898: 852: 845: 812: 811: 804: 794: 789: 774: 765: 764: 753: 43:in the form of chance events modeled as " 2106:of this game can be found by taking the 503: 179:von Neumann–Morgenstern utility function 2711:Playing for real: a text on game theory 2528: 1242: 1049: 465:To more easily solve this game for the 249: 736:. Through their actions, player 1 has 354:is a set of decision nodes such that: 2554:"Infinite Chess, PBS Infinite Series" 2470:{\displaystyle (q_{1}^{*},q_{2}^{*})} 954:is a finite tree with a set of nodes 273:what each player knows for every move 126:Each node of the Chance player has a 64:general definition was introduced by 7: 284:A game represented in extensive form 73: 1734:{\displaystyle \iota (v)=\iota (H)} 3003:First-player and second-player win 1357: 1340: 755: 693:, but then type 1 prefers to play 224:). Examples of such games include 14: 1193:{\displaystyle H\in \mathbf {H} } 3110:Coalition-proof Nash equilibrium 1841: 1683: 1623: 1350: 1186: 1141:called an information partition, 1107: 1090:{\displaystyle p:V\rightarrow D} 853: 790: 775: 732:and randomising if they observe 500:Player 2's Strategies: {U’ , D’} 256:Perfect and complete information 169:for a player thus consists of a 2914:Lectures on the theory of games 2104:subgame perfect Nash equilibria 2040:as the strategy they adopt and 438:when they have actually played 199:Shoham & Leyton-Brown (2009 33:choices at every decision point 3120:Evolutionarily stable strategy 2916:. Princeton University Press. 2713:. Oxford University Press US. 2464: 2428: 2175: 2162: 1918: 1893: 1879: 1829: 1825: 1813: 1810: 1807: 1801: 1728: 1722: 1713: 1707: 1634: 1618: 1514:the set of successor nodes of 1501: 1495: 1472: 1466: 1423: 1417: 1411: 1408: 1402: 1317: 1311: 1261: 1217:{\displaystyle {\mathcal {A}}} 1159: 1153: 1081: 1058:{\displaystyle D=V\setminus T} 838: 832: 820: 801: 785: 782: 681:, type 2 would prefer to play 497:Player 1's Strategies: {U , D} 1: 3048:Simultaneous action selection 1945:is a payoff profile function. 471:, it can be converted to the 3980:List of games in game theory 3160:Quantal response equilibrium 3150:Perfect Bayesian equilibrium 3085:Bayes correlated equilibrium 2912:Harold William Kuhn (2003). 2648:Watson, Joel. (2013-05-09). 2615:Watson, Joel. (2013-05-09). 2582:Watson, Joel. (2013-05-09). 1690:{\displaystyle \mathbf {H} } 1591:is a finite set of players, 1114:{\displaystyle \mathbf {H} } 664:perfect Bayesian equilibrium 448:perfect Bayesian equilibrium 3449:Optional prisoner's dilemma 3180:Self-confirming equilibrium 2502:Self-confirming equilibrium 442:so that player 2 will play 337:subgame perfect equilibrium 55:Finite extensive-form games 4032: 3914:Principal variation search 3630:Aumann's agreement theorem 3293:Strategy-stealing argument 3205:Trembling hand equilibrium 3135:Markov perfect equilibrium 3130:Mertens-stable equilibrium 2826:Cambridge University Press 1026:{\displaystyle T\subset V} 1007:, a set of terminal nodes 1000:{\displaystyle v^{0}\in V} 427:and so player 2 will play 3950:Combinatorial game theory 3609:Princess and monster game 3165:Quasi-perfect equilibrium 3090:Bayesian Nash equilibrium 2691:. Vol. 1. Elsevier. 2497:Combinatorial game theory 214:combinatorial game theory 201:, chpt. 13) for details. 4016:Game theory game classes 3965:Evolutionary game theory 3698:Antoine Augustin Cournot 3584:Guess 2/3 of the average 3381:Strictly determined game 3175:Satisfaction equilibrium 2993:Escalation of commitment 2841:Downloadable free online 2108:first partial derivative 974:, a unique initial node 740:their type to player 2. 677:. However, if they play 130:over its outgoing edges. 128:probability distribution 27:is a specification of a 3970:Glossary of game theory 3569:Stackelberg competition 3195:Strong Nash equilibrium 2854:Horst Herrlich (2006). 2687:; Hart, Sergiu (eds.). 1976:Stackelberg competition 594:Stackelberg competition 331:and player 2 will play 218:artificial intelligence 208:two-player game over a 3995:Tragedy of the commons 3975:List of game theorists 3955:Confrontation analysis 3665:Sprague–Grundy theorem 3185:Sequential equilibrium 3105:Correlated equilibrium 2471: 2415: 2334: 2254: 2225: 2133: 2094: 2063: 2032: 2001: 1963: 1939: 1858: 1761: 1760:{\displaystyle v\in H} 1735: 1691: 1669: 1605: 1585: 1528: 1508: 1479: 1450: 1430: 1373: 1324: 1295: 1275: 1218: 1194: 1166: 1135: 1115: 1091: 1059: 1027: 1001: 968: 948: 884: 659:status). There is one 643: 615:incomplete information 604:Incomplete information 374: 285: 185:random outcome by its 41:incomplete information 3768:Jean-François Mertens 2884:Mathematische Annalen 2783:at many universities. 2472: 2416: 2335: 2255: 2253:{\displaystyle q_{1}} 2226: 2134: 2132:{\displaystyle q_{2}} 2095: 2093:{\displaystyle c_{2}} 2064: 2062:{\displaystyle c_{1}} 2033: 2031:{\displaystyle q_{2}} 2002: 2000:{\displaystyle q_{1}} 1961: 1950:Infinite action space 1940: 1859: 1762: 1736: 1692: 1670: 1606: 1586: 1529: 1509: 1485:is a bijection, with 1480: 1451: 1431: 1374: 1325: 1296: 1276: 1219: 1195: 1167: 1136: 1116: 1092: 1060: 1028: 1002: 969: 949: 885: 724:and player 2 playing 708:, player 2 will play 641: 450:where player 1 plays 411:, player 2 will play 403:, player 2 will play 380:imperfect information 372: 343:Imperfect information 315:, player 2 will play 283: 264:the players of a game 195:epistemic modal logic 3897:Search optimizations 3773:Jennifer Tour Chayes 3660:Revelation principle 3655:Purification theorem 3594:Nash bargaining game 3559:Bertrand competition 3544:El Farol Bar problem 3509:Electronic mail game 3474:Lewis signaling game 3018:Hierarchy of beliefs 2487:Axiom of determinacy 2425: 2344: 2266: 2237: 2149: 2116: 2077: 2046: 2015: 1984: 1870: 1773: 1745: 1701: 1679: 1615: 1595: 1541: 1518: 1507:{\displaystyle s(v)} 1489: 1478:{\displaystyle s(v)} 1460: 1440: 1383: 1337: 1323:{\displaystyle a(v)} 1305: 1285: 1230: 1204: 1176: 1165:{\displaystyle A(H)} 1147: 1125: 1103: 1069: 1037: 1011: 978: 958: 897: 752: 649:by the other players 3945:Bounded rationality 3564:Cournot competition 3514:Rock paper scissors 3489:Battle of the sexes 3479:Volunteer's dilemma 3351:Perfect information 3278:Dominant strategies 3115:Epsilon-equilibrium 2998:Extensive-form game 2586:. pp. 97–100. 2492:Perfect information 2463: 2445: 2361: 2283: 1301:to a single action 598:Cournot competition 505: 454:and player 2 plays 385:perfect information 206:perfect information 142:equivalence classes 25:extensive-form game 3924:Paranoid algorithm 3904:Alpha–beta pruning 3783:John Maynard Smith 3614:Rendezvous problem 3454:Traveler's dilemma 3444:Gift-exchange game 3439:Prisoner's dilemma 3356:Large Poisson game 3323:Bargaining problem 3228:Backward induction 3200:Subgame perfection 3155:Proper equilibrium 2897:10.1007/BF01448847 2779:2000-08-15 at the 2652:. pp. 22–26. 2619:. pp. 26–28. 2467: 2449: 2431: 2411: 2409: 2347: 2330: 2328: 2269: 2250: 2221: 2219: 2141:) and finding its 2129: 2090: 2059: 2028: 1997: 1964: 1935: 1854: 1757: 1731: 1687: 1665: 1601: 1581: 1524: 1504: 1475: 1446: 1426: 1379:, the restriction 1369: 1320: 1291: 1271: 1214: 1190: 1162: 1131: 1121:is a partition of 1111: 1087: 1055: 1023: 997: 964: 944: 880: 644: 504: 477:. Given this is a 375: 311:If player 1 plays 286: 238:expectminimax tree 88:(rational) players 4003: 4002: 3909:Aspiration window 3878:Suzanne Scotchmer 3833:Oskar Morgenstern 3728:Donald B. Gillies 3670:Zermelo's theorem 3599:Induction puzzles 3554:Fair cake-cutting 3529:Public goods game 3459:Coordination game 3333:Intransitive game 3263:Forward induction 3145:Pareto efficiency 3125:Gibbs equilibrium 3095:Berge equilibrium 3043:Simultaneous game 2923:978-0-691-02772-2 2875:Historical papers 2865:978-3-540-30989-5 2835:978-0-521-89943-7 2768:978-1-59829-593-1 2720:978-0-19-530057-4 2698:978-0-444-88098-7 2659:978-0-393-91838-0 2626:978-0-393-91838-0 2593:978-0-393-91838-0 2408: 2327: 2218: 1604:{\displaystyle 0} 1527:{\displaystyle v} 1449:{\displaystyle a} 1294:{\displaystyle v} 1134:{\displaystyle D} 967:{\displaystyle V} 744:Formal definition 720:, type 2 playing 704:and type 2 plays 568: 567: 236:. A game over an 156:among the players 4023: 3990:Topological game 3985:No-win situation 3883:Thomas Schelling 3863:Robert B. Wilson 3823:Merrill M. Flood 3793:John von Neumann 3703:Ariel Rubinstein 3688:Albert W. Tucker 3539:War of attrition 3499:Matching pennies 3140:Nash equilibrium 3063:Mechanism design 3028:Normal-form game 2983:Cooperative game 2956: 2949: 2942: 2933: 2927: 2908: 2869: 2838: 2771: 2740:Fudenberg D and 2724: 2707:Binmore, Kenneth 2702: 2672: 2671: 2645: 2639: 2638: 2612: 2606: 2605: 2579: 2573: 2551: 2542: 2536: 2517:Solution concept 2476: 2474: 2473: 2468: 2462: 2457: 2444: 2439: 2420: 2418: 2417: 2412: 2410: 2404: 2403: 2402: 2387: 2386: 2367: 2360: 2355: 2339: 2337: 2336: 2331: 2329: 2323: 2322: 2321: 2306: 2305: 2289: 2282: 2277: 2261: 2259: 2257: 2256: 2251: 2249: 2248: 2230: 2228: 2227: 2222: 2220: 2214: 2213: 2212: 2200: 2199: 2183: 2174: 2173: 2161: 2160: 2140: 2138: 2136: 2135: 2130: 2128: 2127: 2101: 2099: 2097: 2096: 2091: 2089: 2088: 2070: 2068: 2066: 2065: 2060: 2058: 2057: 2039: 2037: 2035: 2034: 2029: 2027: 2026: 2008: 2006: 2004: 2003: 1998: 1996: 1995: 1944: 1942: 1941: 1936: 1934: 1933: 1932: 1926: 1911: 1910: 1909: 1908: 1891: 1890: 1863: 1861: 1860: 1855: 1850: 1849: 1844: 1832: 1794: 1793: 1766: 1764: 1763: 1758: 1740: 1738: 1737: 1732: 1696: 1694: 1693: 1688: 1686: 1674: 1672: 1671: 1666: 1664: 1663: 1650: 1649: 1632: 1631: 1626: 1610: 1608: 1607: 1602: 1590: 1588: 1587: 1582: 1550: 1549: 1533: 1531: 1530: 1525: 1513: 1511: 1510: 1505: 1484: 1482: 1481: 1476: 1455: 1453: 1452: 1447: 1435: 1433: 1432: 1427: 1395: 1394: 1378: 1376: 1375: 1370: 1353: 1329: 1327: 1326: 1321: 1300: 1298: 1297: 1292: 1280: 1278: 1277: 1272: 1270: 1269: 1257: 1256: 1223: 1221: 1220: 1215: 1213: 1212: 1199: 1197: 1196: 1191: 1189: 1171: 1169: 1168: 1163: 1140: 1138: 1137: 1132: 1120: 1118: 1117: 1112: 1110: 1096: 1094: 1093: 1088: 1064: 1062: 1061: 1056: 1032: 1030: 1029: 1024: 1006: 1004: 1003: 998: 990: 989: 973: 971: 970: 965: 953: 951: 950: 945: 928: 927: 906: 905: 889: 887: 886: 881: 858: 857: 856: 819: 818: 817: 816: 799: 798: 793: 778: 770: 769: 728:if they observe 700:If type 1 plays 506: 468:Nash equilibrium 154:common knowledge 135:information sets 84:A finite set of 35:, the (possibly 4031: 4030: 4026: 4025: 4024: 4022: 4021: 4020: 4006: 4005: 4004: 3999: 3933: 3919:max^n algorithm 3892: 3888:William Vickrey 3848:Reinhard Selten 3803:Kenneth Binmore 3718:David K. Levine 3713:Daniel Kahneman 3680: 3674: 3650:Negamax theorem 3640:Minimax theorem 3618: 3579:Diner's dilemma 3434:All-pay auction 3400: 3386:Stochastic game 3338:Mean-field game 3309: 3302: 3273:Markov strategy 3209: 3075: 3067: 3038:Sequential game 3023:Information set 3008:Game complexity 2978:Congestion game 2966: 2960: 2924: 2911: 2880: 2866: 2856:Axiom of choice 2853: 2850: 2848:Further reading 2836: 2817: 2803:Osborne MJ and 2781:Wayback Machine 2769: 2754: 2721: 2705: 2699: 2679: 2676: 2675: 2660: 2647: 2646: 2642: 2627: 2614: 2613: 2609: 2594: 2581: 2580: 2576: 2552: 2545: 2537: 2530: 2525: 2507:Sequential game 2483: 2423: 2422: 2394: 2378: 2368: 2342: 2341: 2313: 2297: 2290: 2264: 2263: 2240: 2235: 2234: 2232: 2204: 2191: 2184: 2165: 2152: 2147: 2146: 2119: 2114: 2113: 2111: 2080: 2075: 2074: 2072: 2049: 2044: 2043: 2041: 2018: 2013: 2012: 2010: 1987: 1982: 1981: 1979: 1952: 1921: 1892: 1882: 1868: 1867: 1839: 1785: 1771: 1770: 1743: 1742: 1699: 1698: 1677: 1676: 1633: 1621: 1613: 1612: 1593: 1592: 1539: 1538: 1516: 1515: 1487: 1486: 1458: 1457: 1438: 1437: 1386: 1381: 1380: 1335: 1334: 1303: 1302: 1283: 1282: 1248: 1228: 1227: 1202: 1201: 1174: 1173: 1145: 1144: 1123: 1122: 1101: 1100: 1067: 1066: 1035: 1034: 1009: 1008: 981: 976: 975: 956: 955: 919: 895: 894: 841: 800: 788: 750: 749: 746: 628:nature's choice 606: 514: 511: 351:information set 345: 258: 240:, like that of 212:(as defined in 57: 45:moves by nature 17: 12: 11: 5: 4029: 4027: 4019: 4018: 4008: 4007: 4001: 4000: 3998: 3997: 3992: 3987: 3982: 3977: 3972: 3967: 3962: 3957: 3952: 3947: 3941: 3939: 3935: 3934: 3932: 3931: 3926: 3921: 3916: 3911: 3906: 3900: 3898: 3894: 3893: 3891: 3890: 3885: 3880: 3875: 3870: 3865: 3860: 3855: 3853:Robert Axelrod 3850: 3845: 3840: 3835: 3830: 3828:Olga Bondareva 3825: 3820: 3818:Melvin Dresher 3815: 3810: 3808:Leonid Hurwicz 3805: 3800: 3795: 3790: 3785: 3780: 3775: 3770: 3765: 3760: 3755: 3750: 3745: 3743:Harold W. Kuhn 3740: 3735: 3733:Drew Fudenberg 3730: 3725: 3723:David M. Kreps 3720: 3715: 3710: 3708:Claude Shannon 3705: 3700: 3695: 3690: 3684: 3682: 3676: 3675: 3673: 3672: 3667: 3662: 3657: 3652: 3647: 3645:Nash's theorem 3642: 3637: 3632: 3626: 3624: 3620: 3619: 3617: 3616: 3611: 3606: 3601: 3596: 3591: 3586: 3581: 3576: 3571: 3566: 3561: 3556: 3551: 3546: 3541: 3536: 3531: 3526: 3521: 3516: 3511: 3506: 3504:Ultimatum game 3501: 3496: 3491: 3486: 3484:Dollar auction 3481: 3476: 3471: 3469:Centipede game 3466: 3461: 3456: 3451: 3446: 3441: 3436: 3431: 3426: 3424:Infinite chess 3421: 3416: 3410: 3408: 3402: 3401: 3399: 3398: 3393: 3391:Symmetric game 3388: 3383: 3378: 3376:Signaling game 3373: 3371:Screening game 3368: 3363: 3361:Potential game 3358: 3353: 3348: 3340: 3335: 3330: 3325: 3320: 3314: 3312: 3304: 3303: 3301: 3300: 3295: 3290: 3288:Mixed strategy 3285: 3280: 3275: 3270: 3265: 3260: 3255: 3250: 3245: 3240: 3235: 3230: 3225: 3219: 3217: 3211: 3210: 3208: 3207: 3202: 3197: 3192: 3187: 3182: 3177: 3172: 3170:Risk dominance 3167: 3162: 3157: 3152: 3147: 3142: 3137: 3132: 3127: 3122: 3117: 3112: 3107: 3102: 3097: 3092: 3087: 3081: 3079: 3069: 3068: 3066: 3065: 3060: 3055: 3050: 3045: 3040: 3035: 3030: 3025: 3020: 3015: 3013:Graphical game 3010: 3005: 3000: 2995: 2990: 2985: 2980: 2974: 2972: 2968: 2967: 2961: 2959: 2958: 2951: 2944: 2936: 2930: 2929: 2922: 2909: 2872: 2871: 2864: 2849: 2846: 2845: 2844: 2834: 2815: 2801: 2784: 2767: 2752: 2738: 2725: 2719: 2703: 2697: 2685:Aumann, Robert 2674: 2673: 2658: 2640: 2625: 2607: 2592: 2574: 2543: 2527: 2526: 2524: 2521: 2520: 2519: 2514: 2509: 2504: 2499: 2494: 2489: 2482: 2479: 2466: 2461: 2456: 2452: 2448: 2443: 2438: 2434: 2430: 2407: 2401: 2397: 2393: 2390: 2385: 2381: 2377: 2374: 2371: 2364: 2359: 2354: 2350: 2326: 2320: 2316: 2312: 2309: 2304: 2300: 2296: 2293: 2286: 2281: 2276: 2272: 2247: 2243: 2217: 2211: 2207: 2203: 2198: 2194: 2190: 2187: 2180: 2177: 2172: 2168: 2164: 2159: 2155: 2126: 2122: 2087: 2083: 2056: 2052: 2025: 2021: 1994: 1990: 1951: 1948: 1947: 1946: 1931: 1925: 1920: 1917: 1914: 1907: 1902: 1899: 1895: 1889: 1885: 1881: 1878: 1875: 1865: 1853: 1848: 1843: 1838: 1835: 1831: 1827: 1824: 1821: 1818: 1815: 1812: 1809: 1806: 1803: 1800: 1797: 1792: 1788: 1784: 1781: 1778: 1768: 1756: 1753: 1750: 1730: 1727: 1724: 1721: 1718: 1715: 1712: 1709: 1706: 1685: 1662: 1659: 1656: 1653: 1648: 1643: 1640: 1636: 1630: 1625: 1620: 1600: 1580: 1577: 1574: 1571: 1568: 1565: 1562: 1559: 1556: 1553: 1548: 1523: 1503: 1500: 1497: 1494: 1474: 1471: 1468: 1465: 1445: 1425: 1422: 1419: 1416: 1413: 1410: 1407: 1404: 1401: 1398: 1393: 1389: 1368: 1365: 1362: 1359: 1356: 1352: 1348: 1345: 1342: 1332: 1331: 1319: 1316: 1313: 1310: 1290: 1268: 1263: 1260: 1255: 1251: 1247: 1244: 1241: 1238: 1235: 1225: 1211: 1188: 1184: 1181: 1161: 1158: 1155: 1152: 1142: 1130: 1109: 1098: 1086: 1083: 1080: 1077: 1074: 1054: 1051: 1048: 1045: 1042: 1022: 1019: 1016: 996: 993: 988: 984: 963: 943: 940: 937: 934: 931: 926: 922: 918: 915: 912: 909: 904: 879: 876: 873: 870: 867: 864: 861: 855: 851: 848: 844: 840: 837: 834: 831: 828: 825: 822: 815: 810: 807: 803: 797: 792: 787: 784: 781: 777: 773: 768: 763: 760: 757: 745: 742: 623:transformation 605: 602: 585: 584: 581: 578: 575: 566: 565: 556: 543: 539: 538: 529: 526: 522: 521: 518: 515: 512: 509: 502: 501: 498: 383:. A game with 364: 363: 359: 344: 341: 335:. This is the 278: 277: 274: 271: 268: 265: 257: 254: 234:infinite chess 158: 157: 150: 149: 148: 145: 131: 124: 113: 99: 89: 66:Harold W. Kuhn 56: 53: 15: 13: 10: 9: 6: 4: 3: 2: 4028: 4017: 4014: 4013: 4011: 3996: 3993: 3991: 3988: 3986: 3983: 3981: 3978: 3976: 3973: 3971: 3968: 3966: 3963: 3961: 3958: 3956: 3953: 3951: 3948: 3946: 3943: 3942: 3940: 3938:Miscellaneous 3936: 3930: 3927: 3925: 3922: 3920: 3917: 3915: 3912: 3910: 3907: 3905: 3902: 3901: 3899: 3895: 3889: 3886: 3884: 3881: 3879: 3876: 3874: 3873:Samuel Bowles 3871: 3869: 3868:Roger Myerson 3866: 3864: 3861: 3859: 3858:Robert Aumann 3856: 3854: 3851: 3849: 3846: 3844: 3841: 3839: 3836: 3834: 3831: 3829: 3826: 3824: 3821: 3819: 3816: 3814: 3813:Lloyd Shapley 3811: 3809: 3806: 3804: 3801: 3799: 3798:Kenneth Arrow 3796: 3794: 3791: 3789: 3786: 3784: 3781: 3779: 3778:John Harsanyi 3776: 3774: 3771: 3769: 3766: 3764: 3761: 3759: 3756: 3754: 3751: 3749: 3748:Herbert Simon 3746: 3744: 3741: 3739: 3736: 3734: 3731: 3729: 3726: 3724: 3721: 3719: 3716: 3714: 3711: 3709: 3706: 3704: 3701: 3699: 3696: 3694: 3691: 3689: 3686: 3685: 3683: 3677: 3671: 3668: 3666: 3663: 3661: 3658: 3656: 3653: 3651: 3648: 3646: 3643: 3641: 3638: 3636: 3633: 3631: 3628: 3627: 3625: 3621: 3615: 3612: 3610: 3607: 3605: 3602: 3600: 3597: 3595: 3592: 3590: 3587: 3585: 3582: 3580: 3577: 3575: 3572: 3570: 3567: 3565: 3562: 3560: 3557: 3555: 3552: 3550: 3549:Fair division 3547: 3545: 3542: 3540: 3537: 3535: 3532: 3530: 3527: 3525: 3524:Dictator game 3522: 3520: 3517: 3515: 3512: 3510: 3507: 3505: 3502: 3500: 3497: 3495: 3492: 3490: 3487: 3485: 3482: 3480: 3477: 3475: 3472: 3470: 3467: 3465: 3462: 3460: 3457: 3455: 3452: 3450: 3447: 3445: 3442: 3440: 3437: 3435: 3432: 3430: 3427: 3425: 3422: 3420: 3417: 3415: 3412: 3411: 3409: 3407: 3403: 3397: 3396:Zero-sum game 3394: 3392: 3389: 3387: 3384: 3382: 3379: 3377: 3374: 3372: 3369: 3367: 3366:Repeated game 3364: 3362: 3359: 3357: 3354: 3352: 3349: 3347: 3345: 3341: 3339: 3336: 3334: 3331: 3329: 3326: 3324: 3321: 3319: 3316: 3315: 3313: 3311: 3305: 3299: 3296: 3294: 3291: 3289: 3286: 3284: 3283:Pure strategy 3281: 3279: 3276: 3274: 3271: 3269: 3266: 3264: 3261: 3259: 3256: 3254: 3251: 3249: 3248:De-escalation 3246: 3244: 3241: 3239: 3236: 3234: 3231: 3229: 3226: 3224: 3221: 3220: 3218: 3216: 3212: 3206: 3203: 3201: 3198: 3196: 3193: 3191: 3190:Shapley value 3188: 3186: 3183: 3181: 3178: 3176: 3173: 3171: 3168: 3166: 3163: 3161: 3158: 3156: 3153: 3151: 3148: 3146: 3143: 3141: 3138: 3136: 3133: 3131: 3128: 3126: 3123: 3121: 3118: 3116: 3113: 3111: 3108: 3106: 3103: 3101: 3098: 3096: 3093: 3091: 3088: 3086: 3083: 3082: 3080: 3078: 3074: 3070: 3064: 3061: 3059: 3058:Succinct game 3056: 3054: 3051: 3049: 3046: 3044: 3041: 3039: 3036: 3034: 3031: 3029: 3026: 3024: 3021: 3019: 3016: 3014: 3011: 3009: 3006: 3004: 3001: 2999: 2996: 2994: 2991: 2989: 2986: 2984: 2981: 2979: 2976: 2975: 2973: 2969: 2965: 2957: 2952: 2950: 2945: 2943: 2938: 2937: 2934: 2925: 2919: 2915: 2910: 2906: 2902: 2898: 2894: 2890: 2886: 2885: 2879: 2878: 2877: 2876: 2867: 2861: 2857: 2852: 2851: 2847: 2842: 2837: 2831: 2827: 2823: 2822: 2816: 2814: 2813:0-262-65040-1 2810: 2806: 2805:Rubinstein A. 2802: 2800: 2799:0-486-65943-7 2796: 2792: 2788: 2785: 2782: 2778: 2775: 2770: 2764: 2760: 2759: 2753: 2751: 2750:0-262-06141-4 2747: 2743: 2739: 2737: 2736:0-486-64216-X 2733: 2729: 2726: 2722: 2716: 2712: 2708: 2704: 2700: 2694: 2690: 2686: 2682: 2678: 2677: 2669: 2665: 2661: 2655: 2651: 2644: 2641: 2636: 2632: 2628: 2622: 2618: 2611: 2608: 2603: 2599: 2595: 2589: 2585: 2578: 2575: 2571: 2567: 2563: 2559: 2555: 2550: 2548: 2544: 2540: 2535: 2533: 2529: 2522: 2518: 2515: 2513: 2510: 2508: 2505: 2503: 2500: 2498: 2495: 2493: 2490: 2488: 2485: 2484: 2480: 2478: 2459: 2454: 2450: 2446: 2441: 2436: 2432: 2405: 2399: 2395: 2391: 2388: 2383: 2379: 2375: 2372: 2369: 2362: 2357: 2352: 2348: 2324: 2318: 2314: 2310: 2307: 2302: 2298: 2294: 2291: 2284: 2279: 2274: 2270: 2245: 2241: 2215: 2209: 2205: 2201: 2196: 2192: 2188: 2185: 2178: 2170: 2166: 2157: 2153: 2144: 2143:best response 2124: 2120: 2109: 2105: 2085: 2081: 2054: 2050: 2023: 2019: 1992: 1988: 1977: 1973: 1969: 1960: 1956: 1949: 1915: 1912: 1900: 1897: 1887: 1883: 1876: 1873: 1866: 1846: 1836: 1833: 1822: 1819: 1816: 1804: 1798: 1795: 1790: 1786: 1779: 1776: 1769: 1754: 1751: 1748: 1725: 1719: 1716: 1710: 1704: 1657: 1651: 1641: 1638: 1628: 1598: 1575: 1572: 1569: 1566: 1563: 1560: 1557: 1551: 1537: 1536: 1535: 1521: 1498: 1492: 1469: 1463: 1443: 1420: 1414: 1405: 1399: 1396: 1391: 1387: 1366: 1363: 1360: 1354: 1346: 1343: 1330:, fulfilling: 1314: 1308: 1288: 1253: 1249: 1239: 1236: 1233: 1226: 1182: 1179: 1156: 1150: 1143: 1128: 1099: 1084: 1078: 1075: 1072: 1052: 1046: 1043: 1040: 1020: 1017: 1014: 994: 991: 986: 982: 961: 938: 935: 932: 929: 924: 920: 916: 913: 907: 893: 892: 891: 874: 871: 868: 865: 862: 859: 849: 846: 835: 829: 823: 808: 805: 795: 779: 771: 758: 743: 741: 739: 735: 731: 727: 723: 719: 715: 711: 707: 703: 698: 696: 692: 688: 684: 680: 676: 672: 667: 665: 662: 658: 652: 650: 640: 636: 634: 630: 629: 624: 622: 617: 616: 611: 603: 601: 599: 595: 589: 582: 579: 576: 573: 572: 571: 563: 562: 557: 555: 553: 549: 544: 541: 540: 536: 535: 530: 527: 524: 523: 519: 516: 508: 507: 499: 496: 495: 494: 492: 491: 486: 485: 481: 476: 475: 470: 469: 463: 461: 457: 453: 449: 445: 441: 437: 432: 430: 426: 422: 418: 414: 410: 406: 402: 398: 392: 390: 386: 382: 381: 371: 367: 360: 357: 356: 355: 353: 352: 342: 340: 338: 334: 330: 326: 322: 318: 314: 309: 307: 303: 299: 295: 290: 282: 275: 272: 269: 266: 263: 262: 261: 255: 253: 251: 247: 243: 239: 235: 231: 227: 223: 219: 215: 211: 207: 202: 200: 196: 190: 188: 184: 180: 176: 172: 168: 167:pure strategy 164: 155: 151: 146: 143: 139: 138: 136: 132: 129: 125: 122: 118: 114: 111: 107: 105: 100: 98: 95:, called the 94: 90: 87: 83: 82: 81: 79: 75: 71: 67: 62: 54: 52: 50: 46: 42: 38: 34: 30: 26: 22: 3843:Peyton Young 3838:Paul Milgrom 3753:HervĂ© Moulin 3693:Amos Tversky 3635:Folk theorem 3346:-player game 3343: 3268:Grim trigger 2997: 2913: 2888: 2882: 2874: 2873: 2858:. Springer. 2855: 2824:, New York: 2820: 2757: 2710: 2688: 2681:Hart, Sergiu 2649: 2643: 2616: 2610: 2583: 2577: 1965: 1953: 1333: 747: 733: 729: 725: 721: 717: 713: 709: 705: 701: 699: 694: 690: 686: 682: 678: 674: 670: 668: 660: 653: 648: 645: 633:God's choice 632: 626: 619: 613: 609: 607: 590: 586: 569: 560: 559: 551: 547: 545: 533: 532: 488: 480:simultaneous 478: 472: 466: 464: 459: 455: 451: 443: 439: 435: 433: 428: 424: 420: 416: 412: 408: 404: 400: 397:ad infinitum 396: 393: 384: 378: 376: 365: 349: 346: 332: 328: 324: 320: 316: 312: 310: 305: 301: 297: 293: 291: 287: 259: 250:Binmore 2007 203: 191: 159: 120: 109: 103: 96: 85: 77: 58: 24: 18: 3960:Coopetition 3763:Jean Tirole 3758:John Conway 3738:Eric Maskin 3534:Blotto game 3519:Pirate game 3328:Global game 3298:Tit for tat 3233:Bid shading 3223:Appeasement 3073:Equilibrium 3053:Solved game 2988:Determinacy 2971:Definitions 2964:game theory 2891:: 295–320. 2774:Free online 1968:real number 520:Down' (D') 474:normal form 252:, chpt. 2) 226:tic-tac-toe 163:realization 93:rooted tree 74:Hart (1992) 70:von Neumann 49:normal-form 21:game theory 3604:Trust game 3589:Kuhn poker 3258:Escalation 3253:Deterrence 3243:Cheap talk 3215:Strategies 3033:Preference 2962:Topics of 2728:Dresher M. 2668:1123193808 2635:1123193808 2602:1123193808 2570:1510.08155 2523:References 2512:Signalling 2145:function, 661:separating 490:strategies 484:sequential 242:backgammon 175:singletons 3788:John Nash 3494:Stag hunt 3238:Collusion 2905:122961988 2791:Raiffa H. 2787:Luce R.D. 2742:Tirole J. 2562:1302.4377 2460:∗ 2442:∗ 2389:− 2358:∗ 2308:− 2280:∗ 2202:− 2189:− 1919:→ 1901:∈ 1837:∈ 1811:→ 1787:ρ 1777:ρ 1752:∈ 1720:ι 1705:ι 1652:∪ 1642:∈ 1412:→ 1364:∈ 1358:∀ 1347:∈ 1341:∀ 1262:→ 1243:∖ 1183:∈ 1082:→ 1050:∖ 1018:⊂ 992:∈ 942:⟩ 911:⟨ 878:⟩ 869:ρ 850:∈ 809:∈ 762:⟨ 756:Γ 738:signalled 542:Down (D) 517:Up' (U') 513:Player 1 389:singleton 210:game tree 189:utility. 171:selection 117:partition 97:game tree 61:game tree 37:imperfect 4010:Category 3929:Lazy SMP 3623:Theorems 3574:Deadlock 3429:Checkers 3310:of games 3077:concepts 2777:Archived 2709:(2007). 2481:See also 621:Harsanyi 510:Player 2 362:reached. 187:expected 183:a priori 3681:figures 3464:Chicken 3318:Auction 3308:Classes 2260:⁠ 2233:⁠ 2139:⁠ 2112:⁠ 2100:⁠ 2073:⁠ 2069:⁠ 2042:⁠ 2038:⁠ 2011:⁠ 2007:⁠ 1980:⁠ 1972:integer 890:where: 657:subgame 525:Up (U) 110:payoffs 2920:  2903:  2862:  2832:  2811:  2797:  2765:  2748:  2734:  2717:  2695:  2666:  2656:  2633:  2623:  2600:  2590:  1697:. Let 528:(0,0) 232:, and 197:; see 106:-tuple 3419:Chess 3406:Games 2901:S2CID 2566:arXiv 2558:arXiv 1033:(let 246:poker 230:chess 76:, an 23:, an 3100:Core 2918:ISBN 2860:ISBN 2830:ISBN 2809:ISBN 2795:ISBN 2789:and 2763:ISBN 2746:ISBN 2732:ISBN 2715:ISBN 2693:ISBN 2664:OCLC 2654:ISBN 2631:OCLC 2621:ISBN 2598:OCLC 2588:ISBN 2564:and 2421:and 2370:5000 2292:5000 2186:5000 2071:and 2009:and 610:type 564:,1) 304:and 296:and 222:draw 216:and 29:game 3679:Key 2893:doi 2889:100 1456:on 1436:of 726:U' 710:D' 691:D' 679:D' 675:D' 631:or 531:(2, 456:U' 444:D' 429:D' 421:D' 413:U' 405:D' 333:D' 325:D' 317:U' 306:D' 302:U' 108:of 19:In 4012:: 3414:Go 2899:. 2887:. 2828:, 2662:. 2629:. 2596:. 2546:^ 2531:^ 1534:. 697:. 600:. 537:) 493:. 431:. 419:, 339:. 228:, 204:A 115:A 91:A 3344:n 2955:e 2948:t 2941:v 2926:. 2907:. 2895:: 2868:. 2843:. 2723:. 2701:. 2670:. 2637:. 2604:. 2572:. 2568:: 2560:: 2465:) 2455:2 2451:q 2447:, 2437:1 2433:q 2429:( 2406:4 2400:2 2396:c 2392:3 2384:1 2380:c 2376:2 2373:+ 2363:= 2353:2 2349:q 2325:2 2319:1 2315:c 2311:2 2303:2 2299:c 2295:+ 2285:= 2275:1 2271:q 2246:1 2242:q 2216:2 2210:2 2206:c 2197:1 2193:q 2179:= 2176:) 2171:1 2167:q 2163:( 2158:2 2154:q 2125:2 2121:q 2086:2 2082:c 2055:1 2051:c 2024:2 2020:q 1993:1 1989:q 1930:I 1924:R 1916:T 1913:: 1906:I 1898:i 1894:) 1888:i 1884:u 1880:( 1877:= 1874:u 1852:} 1847:0 1842:H 1834:H 1830:| 1826:] 1823:1 1820:, 1817:0 1814:[ 1808:) 1805:H 1802:( 1799:A 1796:: 1791:H 1783:{ 1780:= 1767:. 1755:H 1749:v 1729:) 1726:H 1723:( 1717:= 1714:) 1711:v 1708:( 1684:H 1661:} 1658:0 1655:{ 1647:I 1639:i 1635:) 1629:i 1624:H 1619:( 1599:0 1579:} 1576:I 1573:, 1570:. 1567:. 1564:. 1561:, 1558:1 1555:{ 1552:= 1547:I 1522:v 1502:) 1499:v 1496:( 1493:s 1473:) 1470:v 1467:( 1464:s 1444:a 1424:) 1421:H 1418:( 1415:A 1409:) 1406:v 1403:( 1400:s 1397:: 1392:v 1388:a 1367:H 1361:v 1355:, 1351:H 1344:H 1318:) 1315:v 1312:( 1309:a 1289:v 1267:A 1259:} 1254:0 1250:v 1246:{ 1240:V 1237:: 1234:a 1224:. 1210:A 1187:H 1180:H 1160:) 1157:H 1154:( 1151:A 1129:D 1108:H 1085:D 1079:V 1076:: 1073:p 1053:T 1047:V 1044:= 1041:D 1021:V 1015:T 995:V 987:0 983:v 962:V 939:p 936:, 933:T 930:, 925:0 921:v 917:, 914:V 908:= 903:K 875:u 872:, 866:, 863:a 860:, 854:H 847:H 843:} 839:) 836:H 833:( 830:A 827:{ 824:, 821:] 814:I 806:i 802:) 796:i 791:H 786:( 783:[ 780:, 776:H 772:, 767:K 759:= 734:U 730:D 722:U 718:D 714:D 706:D 702:U 695:D 687:U 683:U 671:D 561:3 558:( 554:) 552:2 550:, 548:1 546:( 534:1 482:/ 460:D 452:D 440:D 436:U 425:U 417:U 409:D 401:U 329:U 321:U 313:D 298:D 294:U 121:n 104:n 86:n 78:n

Index

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
combinatorial game theory

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