In many situations a decision maker has incomplete psychological preferences, and the weak axiom of revealed preference (WARP) is often violated. In this paper we relax WARP, and replace it with convex axiom of revealed non-inferiority (CARNI). An alternative x is revealed inferior to y if x is...

This paper analyzes the implementation of correlated equilibria that are immune to joint deviations of coalitions by cheap-talk protocols. We construct a universal cheap-talk protocol (a polite protocol that uses only 2-player private channels) that is resistant to deviations of fewer than half...

Experimental evidence suggests that people tend to be overconfident in the sense that they overestimate the accuracy of their private information. In this paper, we show that risk-averse principals might prefer overconfident agents in various strategic interactions because these agents help...

Demichelis & Weibull (AER 2008) show that adding lexicographic lying costs to coordination games with cheap talk yields a sharp prediction: only the efficient outcome is evolutionarily stable. I show that this result is caused by the discontinuity of preferences rather than by small lying costs...

This paper studies extensive form games with public information where all players have the same information at each point in time. We prove that when there are at least three players, all communication equilibrium payoffs can be obtained by unmediated cheap-talk procedures. The result...

This paper studies extensive form games with perfect information and simultaneous moves, henceforth called games with public information. On this class, we prove that all communication equilibrium payoffs can be obtained without mediator by cheap-talk procedures. The result encompasses repeated...

Experimental evidence suggests that people tend to be overconfident in the sense that they overestimate the accuracy of their own predictions. In this paper we present a simple principal-agent model in which principal's interest in dispersing risk motivates him to hire overconfident agents. We...

We study a variant of the repeated Prisoner's Dilemma with uncertain horizon, in which each player chooses his foresight ability: that is, the timing in which he is informed about the realized length of the interaction. In addition, each player has an independent probability to observe the...

A leading solution concept in the evolutionary study of extensive-form games is Selten (1983) notion of limit ESS. This note demonstrates that a limit ESS does not imply neutral stability, and that it may be dynamically unstable (almost any small perturbation takes the population away). These...

Most existing decision-making models assume that choice behavior is based on preference maximization even when the preferences are incomplete. In this paper we study an alternative approach – “justifiable choice”: each agent has several preference relations (“justifications”), and she...