We take a different look at the PISA 2006 data set considering time input as the main ingredient for scholarly achievement. Across countries, absolute time spent studying is negatively related to scholarly achievement, while a larger fraction of total study time spent in the classroom is...

In this paper, we propose an intuitive way of how to measure residential segregation. Individuals are located in different nodes on a network that are interconnected through links. Each period, an individual either advances to an adjacent node or she stops moving. In this setting, the...