People are exposed to a constant flow of information about economic, social and political phenomena; nevertheless, misinformation is ubiquitous in the society. This paper studies the spread of misinformation in a social environment where agents receive new information each period and update their...

I present a model of the creative development of a field and analysis of the model based on an extensive set of simulations. The field begins from an initial states and grows as individuals enter the field and make new contributions; its basic structure resembles a lattice. New elements are...

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...

This paper studies the spread of misinformation when agents have both individual and social learning. I characterize the steady state opinion vector and I show that agents with poor individual learning and high centrality are the best channels of misinformation. I study the conditions under...

Interdependencies in consumer behavior stem from either status-seeking consumption or compliance with social norms. This paper analyzes how a consumption act changes from a means to signal the consumer's status to a means of norm compliance. It is shown that such a transformation can only be...

A decision maker (DM) must address a series of problems over time. Each period, a random case arises and the DM must make a yes-or-no decision, which we call a ruling. She is uncertain about the correct ruling until she conducts a costly investigation. A ruling establishes a precedent, which may...

A decision maker makes a ruling on a random case in each period. She is uncertain about the correct ruling until conducting a costly investigation. A ruling establishes a precedent, which cannot be violated under binding precedent. We compare the information acquisition incentives, the evolution...

We provide an axiomatic approach to a belief formation process in an informational environment characterized by limited, heterogenous and differently precise information. For a list of previously observed cases an agent needs to express her belief by assigning probabilities to possible outcomes....

We develop a model in which an overconfident agent learns about groups in society from observations of his and others' successes. In our model, both the agent's information and his beliefs are multi-dimensional, allowing us to study interactions between different views. Overall, society always...

We propose a framework in order to econometrically estimate case-based learning and apply it to empirical data from twelve 2 × 2 mixed strategy equilibria experiments. Case-based learning allows agents to explicitly incorporate information available to the experimental subjects in a simple,...