Several countries have implemented programs that use test scores to rank schools, and to reward or penalize them based on their students' average performance. Recently, Kane and Staiger (2002) have warned that imprecision in the measurement of school-level test scores could impede these efforts....

This paper provides an introduction to what is known about trends in international commodity market integration during the second half of the second millennium. Throughout, our focus is on intercontinental trade, since it is the emergence of large-scale trade between the continents which has...

We use administrative longitudinal data on earnings, impairment, and mortality to replicate and extend Bound¡¯s seminal study of rejected applicants to federal Disability Insurance (DI). We confirm Bound¡¯s main result that rejected older male applicants do not exhibit substantial labor...

The dismal growth performance of Africa is the worst economic tragedy of the XXth century. We document the evolution of per capita GDP for the continent as a whole and for subset of countries south of the Sahara desert. We document the worsening of various income inequality indexes and we...