The analysis finds that in addition to U-shaped paths of environmental quality arising for growth in income per capita, growth in population can also produce socially efficient patterns that are U-shaped. Sufficient conditions for both types of paths are identified for a range of models and...

We empirically examine whether there is discernable variation in the matriculation patterns of low-income students at public flagship institutions in the United States around changes in institutional financial-aid policies that target resident, low-income students with need-based aid. While...

Much of human knowledge is produced in the world's university departments. There is little scientific evidence, however, about how those hundreds of thousands of departments are best organized and led. This study hand-collects longitudinal data on departmental chairpersons in 58 US universities...