This project studies collaboration in highly skilled, nationally diverse teams. An unexpected international political conflict makes national diversity more salient among existing and potential team members. I exploit this natural experiment to quantify the role of social, identity-driven, costs...

Despite numerous studies on the social and political impact of refugees in Europe, we have very little systematic evidence on the impact of refugee settlement on social cohesion in the developing world. Using data gathered in Northern Lebanon, we show that increased salience of the "refugee...

Although the incidence of conflicts between Fulani nomadic pastoralists and sedentary farmers in Nigeria have risen significantly during the last decade, no study has, to the best of my knowledge, examined how these conflicts influence distrust of members of the Fulani ethnic group and the...

We introduce political salience into a canonical model of attacks against political regimes, as scaling agents' expressive payoffs from taking sides. Equilibrium balances heterogeneous expressive concerns with material bandwagoning incentives, and we show that comparative statics in salience...

We study contracting between a public good provider and users with private valuations of the good. We show that, once the provider extracts the users' private information, she benefits from manipulating the collective information received from all users when communicating with them. We derive...

A growing experimental literature studies the endogenous choice of institutions to solve cooperation problems arising in prisoners' dilemmas, public goods games, and common pool resource games. Participants in these experiments have the opportunity to influence the rules of the game before they...

Cyber attacks can impair banks operations and precipitate bank runs. When digital infrastructure is shared, banks defend themselves by investing in cybersecurity but can free-ride on the security measures of others. Ex ante free-riding by banks interacts with the ex post coordination frictions...

With the increasing recognition of the use of reforestation measures as a complement to conventional carbon emissions avoidance technologies it is important to understand the market valuation of local forest carbon sinks for climate change mitigation. We conducted a framed-field experiment among...

The SARS-CoV-2 pandemic has made all the more clear that public health is a public good. Public health interventions try to encourage contributions to this public good. Digital public health interventions are increasingly being used to complement traditional public health interventions. The...

This paper examines the implications of habit formation in private and public consumption for the Pareto-efficient provision of public goods, based on a two-period model with nonlinear taxation. If the public good supply is time-invariant, the presence of habit formation generally alters the...