We analyze delinquent networks of adolescents in the United States. We develop a theoretical model showing who the key player is, i.e. the criminal who once removed generates the highest possible reduction in aggregate crime level. We also show that key players are not necessary the most active...

All Courts rule ex-post, after most economic decisions are sunk. This might generate a time-inconsistency problem. From an ex-ante perspective, Courts will have the (ex-post) temptation to be excessively lenient. This observation is at the root of the principle of stare decisis. Stare decisis...

We consider a small open economy that faces a commitment problem in trade liberalization. We examine how the relationship with a large trading partner affects the ability of the small countrys government to sustain free trade through a reputational mechanism. If the small country's government is...

Using data from the European Social Survey on most European countries, we look at the relationship between ethnic identity and employment prospects for immigrants from non-European countries. We find that a strong attachment to religion is associated with a lower probability of being employed....

We explore the pricing of variance risk by decomposing stocks' total variance into systematic and idiosyncratic return variances. While systematic variance risk exhibits a negative price of risk, common shocks to the variances of idiosyncratic returns carry a large positive risk premium. This...

Communal responsibility, a medieval institution studied by Greif (2006), supported the use of credit among European merchants in the absence of modern enforcement technologies. This paper shows how this mechanism helps to overcome enforcement problems in anonymous buyer/seller transactions. In a...

Most of the economic literature on bargaining has focused on situations where the set of possible outcomes is taken as given. This paper is concerned with situations where decision-makers first need to identify the set of feasible outcomes before they bargain over which of them is selected. Our...

We examine how interaction choices depend on the interplay of social and physical distance, and show that agents who are more central in the social network, or are located closer to the geographic center of interaction, choose higher levels of interactions in equilibrium. As a result, the level...

Some booms in housing prices are followed by busts. Others are not. In either case it is difficult to find observable fundamentals that are correlated with price movements. We develop a model that is consistent with these observations. Agents have heterogeneous expectations about long-run...

We survey three distinct types of financial crises which took place in the 1990s and the 2000s: 1) The credit implosion leading to severe banking crisis in Japan; 2) The foreign reserves’ meltdown triggered by foreign hot money flight from frothy economies with fixed exchange rate regimes of...