Results from international standardized tests show large cross-country differences in students' performances. Where do these gaps come from? This paper argues that differences in cultural environments and parental inputs may be of great importance. We show that the school performance of...

Rossi (2022) examines the relative efficiency of skilled workers across countries. He finds the elasticity of skill efficiency with respect to GDP per worker is 1.4 and that the relative human capital accounts for only about 9 percent. We reproduce the paper's main findings and test the...