Abstract. The game-theoretic literature on the problem of the provision of public goods has concentrated almost exclusively on one model—the Prisoner's Dilemma game. Several other simple games may be more applicable in certain situations. In particular, the game structure known as Chicken seems to provide a better description of an important sub-class of games where the good is lumpy rather than continuously divisible. Many environmental public goods belong to this category. A distinct paradox of public-goods provision occurs within games of Chicken.