This paper studies the role of strong versus weak ties in the rural-to-urban migration decision in China. We first develop a network model that puts forward the different roles of weak and strong ties in helping workers to migrate to the city. We then use a unique longitudinal data that allows...

This paper analyzes the relationship between crime and agglomeration where the land, labor, product, and crime markets are endogenously determined. We show that in bigger cities there is relatively more crime, a standard stylized fact of most cities in the world. We also show that, in the short...