In the presence of selection bias, traditional estimators of pseudo panel data are inconsistent. In this paper, the … authors derive the conditions under which consistence is achieved in pseudo-panel estimation and propose a simple test of … of the null hypothesis, the authors can consistently estimate pseudo-panel parameters. They use cross sections and pseudo-panel …

This paper argues that typical applications of panel unit root tests should take possible nonstationarity in the … volatility process of the innovations of the panel time series into account. Nonstationarity volatility arises for instance when … enjoyed by many industrialized countries, known as the "Great Moderation". It also proposes a new testing approach for panel …