We use a sample of tenth-graders to test for peer-group influences on the propensity to engage in five activities: drug use, alcohol drinking, cigarette smoking, church going, and the likelihood of dropping out of high school. We find strong evidence of peer-group effects at the school level for...

In this paper we use world cycling records to study the pattern of technological development of the track bicycle. We find that there is a strong evidence of 'contagious' effects among cycling records which in turn provides indirect evidence of 'contagious' effects among technological...

In 1993, Colombia implemented an ambitious health reform. Its key component was a radical transformation of the manner in which health care provision, particularly care that was directed toward lower-income individuals, was financed. We first describe the institutional aspects of the reform and...

High inequality has long been regarded as one of the main problems facing Latin American countries. To understand better the determinants of inequality and to help guide thinking about policy options, it is useful to know whether inequality mainly reflects low intergenerational mobility or...