Our understanding of risk preferences can be sharpened by considering their evolutionary basis. Recently, Robatto and Szentes (2017) found that both aggregate risk and idiosyncratic risk generate the same growth rate in a continuous time setting. We introduce a new source of risk, which is...

This paper analyzes the implementation of correlated equilibria that are immune to joint deviations of coalitions by cheap-talk protocols. We construct a cheap-talk protocol that is resistant to deviations of fewer than half the players, and using it, we show that a large set of correlated...

A strong correlated equilibrium is a correlated strategy profile that is immune to joint deviations. Different notions of strong correlated equilibria have been defined in the literature. One major difference among those definitions is the stage in which coalitions can plan a joint deviation:...

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...

We prove that every undiscounted multi-player stopping game in discrete time admits an approximate correlated equilibrium. Moreover, the equilibrium has five appealing properties: (1) “Trembling-hand” perfectness - players do not use non-credible threats; (2) Normal-form correlation -...

We analyze the influence of unsecured debt (subdebt) on risk-shifting in banks whose assets are risky debt claims. We assume that the stockholders and subdebt-holders jointly decide on risk-shifting. We show that replacing part of the stock with subdebt: (1) leads to fewer risk-shifting events,...

Abstract 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 another axiom, the convex axiom of revealed non-inferiority (CARNI). An alternative x is...

We define a new solution concept for an undiscounted dynamic game - a perfect uniform normal-form constant-expectation correlated approximate equilibrium with a canonical and universal correlation device. This equilibrium has the following appealing properties: (1) “Trembling-hand”...

We consider games in which players search for a hidden prize, and they have asymmetric information about the prize's location. We study the social payoff in equilibria of these games. We present sufficient conditions for the existence of an equilibrium that yields the first-best payoff (i.e.,...

An equilibrium is communication-proof if it is unaffected by new opportunities to communicate and renegotiate. We characterize the set of equilibria of coordination games with pre-play communication in which players have private preferences over the feasible coordinated outcomes....