Using a two-period duopoly model with vertical differentiation, we show that there exists a unique subgame perfect equilibrium where the first entrant supplies a lower quality and gains higher profits than the second entrant. We also prove that this entry sequence is also socially efficient. JEL Classification: C73, D43, L13

We show that the Folk theorem in Wen (1994) may not fully characterize the subgame-perfect equilibrium payo¤ set in a repeated game with unequal discounting, where a player’s equilibrium payo¤ could be strictly less than her e¤ective minimax payo¤ . Keywords: repeated games, e¤ective minimax values, heterogenous discounting JEL Classi…cation: C73

This Online Appendix to the paper titled “Progressive Learning” presents the proof of Lemma 0, an extension of our equilibrium characterization allowing for mixed strategies, an analysis of the full commitment case, and details for Example 4 showing that path dependence can arise even when shocks are ergodic. JEL Classification Codes: C73, D86

We introduce best response dynamics for settings where agents' preferences are diverse. Under these dynamics, which are defined on the space of Bayesian strategies, rest points and Bayesian Nash equilibria are identical. We prove the existence and uniqueness of solution trajectories to these dynamics, and provide methods of analyzing the dynamics based on aggregation. JEL Classification: C72, C73

This paper develops a theory of regular Markov perfect equilibria in dynamic stochastic games. We show that almost all dynamic stochastic games have a finite number of locally isolated Markov perfect equilibria that are all regular. These equilibria are essential and strongly stable. Moreover, they all admit purification. JEL classification numbers: C73, C61, C62.

This paper studies the effects of increasing the number of sellers on Quantal Response Equilibrium (QRE) prices in homogeneous product Bertrand oligopoly markets. We show that the two most commonly used choice functions (power and logistic) lead to qualitatively different comparative-static predictions with respect to the relationship between number of firms and prices. JEL Numbers: C73, D83, L13

We study repeated games where players observe noisy private signals about the unknown state of the world in every period. We find a sufficient condition under which the folk theorem obtains by ex-post equilibria. Our condition is satisfied for generic signal distributions as long as each player has at least two possible private signals. Journal of Economic Literature Classification Numbers: C72...

This paper considers political credibility of allocations in settings with dynamic private information. It embeds a benchmark dynamic moral environment into political economy games which feature repeated voting over mechanisms. Optimal politically credible allocations are shown to solve virtual planning problems with social discount factors in excess of the private one. JEL codes: C73, D72, D82...

We show in a sender-receiver game with strictly opposing interests that rewards enhance trust but do not influence truth-telling. Subjects who reward tend to tell the truth and trust more often in the presence and absence of reward opportunities. The amount of obtained rewards thereby enhances truth-telling. JEL Classification: C72, C73, D83.

We study infinitely repeated two player games with perfect information, where each period consists of two stages: one in which the parties simultaneously choose an action and one in which they can transfer money to each other. We first derive simple conditions that allow a constructive characterization of all Paretooptimal subgame perfect payoffs for all discount factors. Afterwards, we examine...