We study informal insurance within communities, explicitly recognizing the possibility that subgroups of individuals may destabilize insurance arrangements among the larger group. We therefore consider self-enforcing risk-sharing agreements that are robust not only to single-person deviations...

Relative to developed countries and some parts of the developing world, most notably sub-Saharan Africa, there are far fewer women than men in India and China. It has been argued that as many as a 100 million women could be missing. The possibility of gender bias at birth and the mistreatment of...

When human capital accumulation generates pecuniary externalities across professions, and capital markets are imperfect, persistent inequality in utility and consumption is inevitable in any steady state. This is true irrespective of the degree of divisibility in investments. However,...

We study coalition formation in “real time”, a situation in which coalition formation is intertwined with the ongoing receipt of pay-offs. Agreements are assumed to be permanently binding: They can only be altered with the full consent of existing signatories. For characteristic function...

This paper studies income distribution in an economy with borrowing constraints. Parents leave both financial and educational bequests; these determine the occupational choices of children. Occupational returns are determined by market conditions. If the span of occupational investments is...

We model inter-group conflict driven by economic changes within groups. We show that if group incomes are low, increasing group incomes raises violence against that group, and lowers violence generated by it. We then apply the model to data on Hindu-Muslim violence in India. Our main result is...

We model political parties as adaptive decision-makers who compete in a sequence of elections. The key assumptions are that <italic>winners satisfice</italic> (the winning party in period <italic>t</italic> keeps its platform in <italic>t</italic> + 1) while <italic>losers search</italic>. Under fairly mild assumptions about losers' search rules, we show that...

This article provides a theoretical framework that distinguishes between the occurrence of conflict and its severity, and clarifies the role of polarization and fractionalization in each of these cases. The analysis helps in ordering the various definitions, and in providing explanations for the...

This essay presents a rigorous theory of involuntary unemployment in less developed countries based on the observation that at low consumption levels a person's overall ability to work is impaired. The theory links the incidence of involuntary unemployment in a market economy to the incidence of...