In a finite two player game consider the matrix of one player’s payoff difference between any two consecutive pure strategies. Define the half space induced by a column vector of this matrix as the set of vectors that form an obtuse angle with this column vector. We use Farkas’ lemma to show...

This paper shows how the fear of signaling distrust can endogenously lead to incomplete contractual agreements. According to standard results in contract theory an optimal incentive contract should be conditional on all verifiable information containing statistical information about an agent's...

This paper studies the evolution and co-evolution of both characteristics of reciprocity - the willingness to reward friendly behavior and the willingness to punish hostile behavior. Firstly, both preferences for rewarding and preferences for punishing can survive in evolution provided...