The paper presents a large-population analog of fictitious play in which players learn from personal experience. In each period, only one player updates his beliefs about the strategy distribution in the population. Through analysis and examples, we justify the relevance of the single update...

This paper investigates the emergence of cooperation in a heterogeneous population. The population is divided into two cultural groups. Agents in the population are randomly matched in pairs to engage in a prisoner dilemma. The matching process is assortative, that is, cooperators are more...

Until recently, theorists considering the evolution of human cooperation have paid little attention to institutional punishment, a defining feature of large-scale human societies. Compared to individually-administered punishment, institutional punishment offers a unique potential advantage: the...

Until recently, theorists considering the evolution of human cooperation have paid little attention to institutional punishment, a defining feature of large-scale human societies. Compared to individually administered punishment, institutional punishment offers a unique potential advantage: the...

We study a firm's incentives to build and maintain reputation for quality, when quality is persistent and can be certified at a cost. We characterize all Markov-perfect equilibria where the firm's choices -i.e., timing of certification and investment– depend only on the firm's reputation. MPE...

The cobweb model where firms choose between rational and naive forecasting strategies has a 2-cycle when the slope of supply is greater than the slope of demand for a number of different dynamics describing the evolution of strategy choices. This paper proves that the 2-cycle is exponentially...

Recent empirical studies suggest that, during times of unexpected innovation, agents heterogeneously update their beliefs about an asset fundamental value, and they are uncertain about other agents' beliefs on it. In this paper I show that, when there is uncertainty about the market sentiment,...

I study how a firm manages its reputation by investing in the quality of its product and censoring bad news. Without censorship, the threat of bad news provides strong incentives for investment. I highlight two discontinuities in the firm's maximum equilibrium payoff the introduction of...

I model a firm that invests in both the quality of its product and in providing information to the market. Consumers learn about the quality through both news the firm cannot influence and promotion it controls. This ability to promote creates and enhances incentives for investment. Promotion...

Social media are becoming increasingly important in our society and change the way people communicate, how they acquire information, and how they form beliefs. Experts are concerned that the rise of social media may make interaction and information exchange among like-minded individuals more...