We develop a model of endogenous network formation as well as strategic interactionsthat take place on the resulting network, and use it to measure social complementarities in the legislative process. Our model allows for partisan bias and homophily in the formation of relationships, which then...

Whether an idea, information, or infection, diffuses throughout a society depends not only on the structure of the network of interactions, but also on the timing of those interactions. People are not always available to interact with others, and people differ in the timing of when they are...

We examine different populations' play in coordination games in online experiments with over a thousand subjects. Subjects played a two-player coordination game that had multiple equilibria: two equilibria with highly asymmetric payoffs and another equilibrium with symmetric payoffs but a...

I provide a (very) brief introduction to game theory. I have developed these notes to provide quick access to some of the basics of game theory; mainly as an aid for students in courses in which I assumed familiarity with game theory but did not require it as a prerequisite

Teams face a variety of strategic circumstances, and it is socially beneficial for teams to cooperate in productive but not in corrupt ones. Understanding the behavior and social impact of teams requires understanding how cooperation in one situation depends on expectations of cooperation in...

Analyses of treatments, experiments, policies, and observational data, are confounded when people's treatment outcomes and/or participation decisions are influenced by those of their friends and acquaintances. This invalidates standard matching techniques as estimation tools. For instance, the...

When people coordinate their behaviors with their friends---choosing whether to adopt a new technology, to protest against a government, to attend university, etc.---divisions within a social network can result in people adopting different conventions of behavior in different parts of the...

We present two models of how people form beliefs that are based on machine learning theory.We illustrate how these models shed new insight into observed human phenomena by showing how polarized beliefs can arise even when people are exposed to almost identical sources of information. In our...

We study games played between groups of players, where a given group decides which strategy it will play through a vote by its members. When groups consist of two voting players, our games can also be interpreted as network-formation games. In experiments on Stag Hunt games, we find a stark...