Purpose – The purpose of this paper is to discuss sheepskin effects in Colombia based on repeated cross-section or pseudo panel data using cohorts in seven larges cities in Colombia. Design/methodology/approach – A Pseudo Panel Data methodology is used as the basis for determining and...

In the presence of selection bias the traditional estimators for pseudo panel data models are inconsistent. This paper discusses a method to achieve consistency in static linear pseudo panels in the presence of selection bias and a testing procedure for sample selection bias. The authors'...

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 selection bias. Specifically, they propose a Wald test for...