We challenge the global optimality of one-shot punishments in infinitely repeated games with discounting. Specifically, we show that the stick-and-carrot punishment à la Abreu (1986) may not be globally optimal. We prove our result by investigating tacit collusion in the infinite repetition of...

A well established belief both in the game-theoretic IO and in policy debates is that market concentration facilitates collusion. We show that this piece of conventional wisdom relies upon the assumption of profit-seeking behaviour, for it may be reversed when firms pursue other plausible goals....

We study the Lemons Problem when workers have private information on both their skills and their intrinsic motivation for the job offered by firms in the labor market. We first show that, when workers are motivated, inefficiencies due to adverse selection are mitigated. More interestingly,...

How do wage and other financial benefits affect the set of candidates for political office? In this theoretical paper, we answer the question by studying self-selection into politics of individuals with heterogeneous skills and heterogeneous motivations. Our predictions are in line with the...

Social norms of cooperation are studied under several forms of communication. In an experiment, strangers could make public statements before playing a prisoner's dilemma. The interaction was repeated indefinitely, which generated multiple equilibria. Communication could be used as a tool to...

Under what conditions can cooperation be sustained in a network of strangers? Here we study the role of institutions and uncover a new behavioral foundation for the use of monetary systems. In an experiment, anonymous subjects could cooperate or defect in bilateral random encounters. This...