This paper compares student performance in traditional and online classes using a methodological framework free from problems affecting past studies including self-selection bias that beset many earlier studies. The data employed in this study consists of 1) students' test scores in Principles...

The American states have provided a rich laboratory in which to examine influences on economic growth, physical capital, human capital, and a variety of policy variables. Existing studies typically use broad cross sections of all states or particular regional subsamples. Pairwise matching is an...