An Index of Competitiveness and Cooperativeness for Normal-Form Games

We develop an index of competitiveness and cooperativeness that is based on the primitives a normal-form game, i.e., players, strategies payoffs. The relies unique decomposition given game into zero-sum common interest game. decreases in distance to its part increases part. comparative statics our coincide with economic intuition. also supports experimental findings well-known classes games sense more cooperative less competitive behavior correlates lower values index. (JEL C71, C72)