An index of competitiveness and cooperativeness for normal-form games

Thomas Demuynck, Christian Seel, Giang Tran

Research output: Contribution to journalArticleAcademicpeer-review


We develop an index of competitiveness and cooperativeness which is based on the primitives of a normal-form game, i.e., players, strategies and payoffs. The index relies on the unique decomposition of a given game into a zero-sum game and a common-interest game. The index decreases in the distance to its zero-sum part and it increases in the distance to its common-interest part. The comparative statics of our index coincide with economic intuition. The index also supports experimental findings in well-known classes of games in the sense that more cooperative and less competitive behavior correlates with lower values of the index.
Original languageEnglish
JournalAmerican Economic Journal-Microeconomics
Publication statusE-pub ahead of print - 2020

Cite this