Many Social Interactions display either or both of the following well documented phenomena. People tend to interact with similar others (homophily). And they tend to treat others more favorably if they are perceived to share the same identity (in-group bias). While both phenomena involve some...

In this paper, we show that drought has a positive effect on the incidence of civil war over the 1945-2005 period in Sub-Saharan Africa. We use the Palmer Drought Severity Index which is a richer measurement of drought than the measures used in the literature (rainfall and temperature) as it...

Prior to the Civil War there were three major differences among states in how U.S. banks were regulated: (1) Whether they were established by charter or under free-banking laws. (2) Whether they were permitted to branch. (3) Whether the state established a state-owned bank. I use a census of the...