In his second Prisoner's Dilemma tournament, Robert Axelrod used a strategy responding with a "tit" for this many "tats.
This is the Nakamura number of a game with seven players where the subsets of size at least three are the coalitions. It is the largest number of chips one can bet in a round of Kuhn poker. The product of the unitless Paasche and Laspeyres price indices gives this power of the Fisher index. The Bertrand and Cournot models govern behavior of this many actors, while a classical Edgeworth Box includes this many types of goods and also this many individuals. At most this number of fairness criteria are satisfied at once by a rank-order voting system according to Arrow's impossibility theorem. In his second Prisoner's Dilemma tournament, Robert Axelrod used a strategy responding with a "tit" for this many "tats." It is the number of pure strategy Nash equilibria in Chicken, as well as in Battle of the Sexes. For 10 points, identify this number, the amount of players in the Prisoner's Dilemma.
This is the Nakamura number of a game with seven players where the subsets of size at least three are the coalitions.
two