ABSTRACT
A team game (Palfrey & Rosenthal, 1983) involves a competition between two groups or teams of players. Each player independently chooses whether (or how much) to contribute towards his or her group effort. Contribution is costly. Payoff to a player is an increasing function of the total contribution made by members of his or her own team and a decreasing function of the total contribution made by members of the opposing team. This paper will focus on one team game, called the Intergroup Prisoner’s Dilemma (IPD) game (Bornstein, 1992). The IPD game is the most general of the team game models (Bornstein, 1992) and it will be used to demonstrate the potential of this paradigm as an analytical and experimental tool for studying intergroup conflict.2
