I unify the following (1) men face paternal uncertainty while women do not face maternal uncertainty, (2) putative fathers and paternal kin care about true paternity, (3) paternity confidence is systematically lower in matrilocal cultures than in patrilocal ones, (4) inheritance tends to be...

We examine how increased competition among motivated MFIs impacts the poorest borrowers’ access to microfinance. We find that it depends on inequality, technology and the possibility of double-dipping (borrowing from several sources). Without competition, even a motivated MFI may lend to the...

If the consumer's risk aversion behavior varies intertemporally and if the risk aversion coefficient on future consumption becomes very large, the consumer tends to aim at a fixed future consumption target. A by-product is a reinterpretation of subsistence theories of consumption.

We model the linkage between immigration of maids and intersectoral movements of female family labor in a small open economy with a competitive factory sector and a household sector which employs both immigrant maids and family labor. We show that relaxing immigration restrictions on maids will...

Many men invest in their sisters’ children instead of their wives’. Existing theories addressing such behavior depend on the level of paternity probability in such men’s societies being implausibly low. I link this anthropologically observed investment behavior with the experimentally...

We develop a tractable model of competition among socially motivated MFIs, so that the objective functions of the MFIs put some weight on their own clients' utility. We find that the equilibrium involves double-dipping, i.e. borrowers taking multiple loans from different MFIs, whenever the MFIs...

Motivated by the Somali fishermen–pirates, I explore the time allocation decision of potential pirates between piracy and an alternative non-violent occupation, fishing, when the returns of both piracy and fishing are sensitive to patrolling intensity. For a range of parameters, the static...

I focus on the effect of changes in public security (policing) on private security measures that potential victims can take. In particular, I look at the tradeoff between different types of private security measures – such as using or carrying guns, carrying less cash or keeping less valuables...

I argue for an alternative interpretation of King Solomon's problem in terms of one of the two claimants being “malicious”. A “malicious” claimant places no intrinsic value on the object but derives utility from depriving the rival claimant. This new interpretation permits a simpler...

Informal monitors can sometimes substitute for formal law enforcement. Monitors hired to minimize cheating, however, are themselves vulnerable to collusion and extortion. I focus on one such informal monitor – the fair authorities at the trade fairs at Champagne – asking why the fairs...