Horrace and Oaxaca (2001) treat the regressors in gender wage gap by industry measures as non-stochastic when computing the corresponding standard errors. However, the non-stochastic regressors assumption is thought to be inappropriate in modern econometrics. In this paper, we derive the correct...

Horrace and Oaxaca (2001) treat the regressors in gender wage gap by industry measures as non-stochastic when computing the corresponding standard errors. However, the non-stochastic regressors assumption is thought to be inappropriate in modern econometrics. In this paper, we derive the correct...

We take advantage of Taiwan Education Panel Survey data to evaluate the timing of the coaching effect on mathematics learning for junior high-school students. Our main finding suggests that the best strategy for the budget-limited parents is to send their children to cram schools for intensive...