AMS 2000 subject classifications: 60G70, 62H12, 62H15, 62F05, 62F12, 62F25.

An asymptotic test for heteroskedasticity has been developed. The test does not rely on any assumption about heteroskedasticity, and introduces two alternative statistics based on the same idea. Power of these two alternative test statistics has been measured by Monte Carlo simulations. For...

The “difference” and “system” generalized method of moments (GMM) estimators for dynamic panel models are growing steadily in popularity. The estimators are designed for panels with short time dimensions (T), and by default they generate instruments sets whose number grows quadratically...