We develop an explanation of the emergence of local norms, and theassociated phenomenon of geographical variation in behavior.Individuals are assumed to interact locally with neighbors in anenvironment with a network externality. Although many patterns ofbehavior are possible, the dispersed...

Policymakers have an interest in identifying the differences in behavior patterns - namely, habitual caloric intake and physical activity levels - that contribute to demographic variation in body mass index (BMI) and obesity risk. While disparities in mean BMI and obesity rates between whites...

We analyze the impact of classroom peers’ ability (measured by their individual fixed effects) on student achievement for all Florida public school students in grades 3–10 over a 6-year period. We control for both student and teacher fixed effects, thereby alleviating biases due to...

"Informal" work refers to temporary or occasional side jobs from which earnings are presumably not reported in full to the Internal Revenue Service and which typically do not constitute a dominant or complete source of income. Perhaps the most important reason for undertaking informal work is to...