Until about 13,000 years ago all humans obtained their food through hunting and gathering, but thereafter people in some parts of the world began a transition to agriculture. Recent data strongly implicate climate change as the driving force behind the transition in southwest Asia. We propose a...

Permanent economic inequality is unknown among mobile hunter-gatherers, but hereditary class distinctions between elites and commoners exist in some sedentary foraging societies. With the spread of agriculture, such stratification tends to become more pronounced. We develop a model to explain...

We investigate whether immigrant and minority workers' poor access to high-wage jobs---that is, glass ceilings---is attributable to poor access to jobs in high-wage firms, a phenomenon we call glass doors. Our analysis uses linked employer-employee data to measure mean- and quantile-wage...

Measures of household consumption-­which may be used to investigate average consumption growth, mor consumption poverty and inequality-­must account for the rental flow from owned accommodation. We consider two econometric problems relating to the imputation of rental flows for owned...

Collective household models posit that each household member has access to a fraction of the household budget, called a resource share, which defines the shadow budget faced by a household member. Together with the within-household shadow price vector, the shadow budget determines the material...

We propose a generalization of random coefficients models, in which the regression model is an unknown function of a vector of regressors, each of which is multiplied by an unobserved error. We also investigate a more restrictive model which is additive (or additive with interactions) in unknown...

Between the eleventh and fourteenth centuries English peasants faced large income shocks relative to mean incomes.  Innovations in property rights over land induced peasants to respond by trading small parcels of land as part of their risk coping strategy.  The same period witnessed a dramatic...

We study different methods of immigration control using a simple model of a congested world. Our main comparison involves quota, the predominant instrument of immigration control, and a proposed system of immigration tolls and emigration subsidies. We show that the equilibrium of the proposed...

We consider a world in which the mode of food production, foraging or agriculture, is endogenous, and in which technology grows exogenously. Using a recent model of coalition formation, we allow individuals to rationally form cooperative communities (bands) of foragers or farmers. At the lowest...