We investigate a setting in which members of a population, bifurcated into a majority and a minority, transact with randomly matched partners. All members are uniformly altruistic, and each transaction can be carried out cooperatively or through a market mechanism, with cooperative transactions...

The theory of money typically ignores the fact that the mode of market interaction arises endogenously, and simply assumes a decentralized, bilateral exchange process. However, endogenizing the organization of trade is critical for understanding the conditions that lend themselves to the...

The demographic history of the Jews in the Middle Ages may be characterized by two main phenomena: i) a sharp drop in the number of Jews until the beginning of the modern period, due mainly to conversions; and, ii) early urbanization. Until now, these features have been analyzed as primarily...