| 简介： | Abstract
This paper explores a class of games that feature a pool of heterogeneous players who randomly match with others. Each meeting creates a payoff that exhibits strategic substitutes in the players’ actions. Existing literature approaches similar scenarios as aggregation games, but fails to capture the pairwise matching nature in this problem. Many typical properties become invalid, such as the equilibrium uniqueness and usual comparative statics results. I establish this class of games as population games and present three independent sets of conditions that deliver the equilibrium uniqueness. I show that an overall increase in the action cost leads to an overall decrease in the action levels only when the cost distribution is more dispersed. Given further normalization assumptions, I also present the distributional changes in the equilibrium actions under transformations of the payoff function. |