Repetition is a classic mechanism for the evolution of cooperation. The standard way to study repeated games is to assume that there is an exogenous probability with which every interaction is repeated. If it is sufficiently likely that interactions are repeated, then reciprocity and cooperation...

We conducted an experiment on the Voluntarily Separable Repeated Prisoner's Dilemma, which adds staying and leaving options after each round in a repeated Prisoner's Dilemma (RPD). Furthermore, we introduce the doubly-stochastic horizon, where the supergame and two pairs are terminated randomly...

We consider social decision-making situations where some voters may have a conflict of interest in some social alternatives/applicants to be ranked. Then the accountability of the collective decision process is essential. We extend the standard social welfare function to include the interest...

Research on cartel inspection has considered dynamic behaviors of firms but not of the regulator. The current paper allows the antitrust authority to choose the level of cartel monitoring intensity and its dynamic patterns. Specifically, we compare stationary monitoring policies with "switching"...

In the current mobile world, repeated relationships (communities) must be self-sustained by its members. We formulate a framework in which some or all players strategically choose whether to repeat an N-person game or to terminate it. This dynamic game ends when a certain number of players...

In the current mobile world, repeated relationships ("communities") must be self-sustained. We formulate a framework in which some or all players strategically choose whether to terminate or repeat an N-person game. A dynamic game ends when a certain number of players choose termination. To...

There is a widespread hope that, in the near future, algorithms become so sophisticated that ``solutions" to most problems are found by machines. In this note, we throw some doubts on this expectation by showing the following impossibility result: given a set of finite-memory, finite-iteration...

We propose a new framework of collective decision-making, which takes conflicts of interest among the voters and voting alternatives (e.g., among committee members/referees and applicants/contestants for some competition) into account. We define accountability by properties of social welfare...