Question: Game Theory (Stag-Hunt Game):

N players go hunting; each can choose to hunt either stag or hare, so the set of actions available to each player is {S, H} (S stands for "hunt stag", H stands for "hunt hare"). If all N players hunt S, then each gets payoff 2. If any players hunt hare, then each hare-hunter gets payoff 1, while all stag-hunters get zero. (Interpretation, the stag is only caught if all N players work together).

1. Suppose first that N = 2 (i.e., that there are two players). Write out the payoff matrix.
2. Now let N = 3: Show that it is not a Nash equilibrium for 2 players to choose S, and one player to choose H: specifically, show that if this is what players plan to do, and if all players correctly anticipate it, then somebody can improve his payoff by changing only his own action.

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