We analyze binary choice models in communication networks, in which both, the formation of links in the network as well as the action choices are endogenous. We provide a complete characterization of the equilibrium action choices and networks, where agents choose their strategies - actions and...

The symmetric two-player Hirshleifer (1989) contest is shown to admit a unique equilibrium. The support of the equilibrium strategy is finite and includes, in particular, the zero expenditure level. We also establish a lower bound for the cardinality of the support and an upper bound for the...

We investigate how changes in the salience of a minority group affect the majority group's voting behavior. Specifically, we focus on Muslim communities and their increased salience in daily life during Ramadan. To estimate a causal effect, we exploit exogenous variation in the distance of...

This paper expands the micro-foundations of the traditional greed and grievance non-cooperative model of civil conflict between a government and a rebel group. First, the paper's model allows for greed and grievance to be orthogonal, so that they may affect each other. Second, the model allows...

Group-based identity undermines democracy by impeding democratic change of government. A substantial literature has therefore studied how to make democracy consistent with group identity. We contribute to this literature by introducing the role of group decisiveness into voting incentives and...

We study the role of an enforcer in the effectiveness of selective incentives in solving the collective action problem when groups take part in a contest. Cost functions exhibit constant elasticity of marginal effort costs. If prize valuations are homogeneous, our source of heterogeneity induces...

We characterize the equilibrium set of the n-player Hirshleifer contest with homogeneous valuations. A symmetric equilibrium always exists. It necessarily corresponds to multilateral peace for sufficient noise and uses finite-support randomized strategies otherwise. Asymmetric equilibria are...

We survey the empirical literature in economics on the impact of media technologies on social capital. Motivated by a simple model of information and collective action, we cover a range of different outcomes related to social capital, from social and political participation to interpersonal...

This paper develops a theoretical framework that makes predictions on (a) the conditions under which a populist party decides to run and the policy position it takes and (b) voters' response under different electoral systems. We test these predictions using data on Italian municipal elections...

This paper investigates how voters respond to threats to the nation by estimating the political effects of the Cuban Missile Crisis. To establish causality, I exploit the geographical variation induced by the range of the missiles: only U.S. localities within 1,000 nautical miles from Cuba could...