We consider estimation of panel data models with sample selection when the equation of interest contains endogenous explanatory variables as well as unobserved heterogeneity. We offer a detailed analysis of the pooled two-stage least squares (pooled 2SLS) and fixed effects-2SLS (FE-2SLS)...

Many empirical studies have found a positive association between economic development and democracy survival across countries; however, establishing a causal link between the two with naturally occurring data is problematic. We address this question in a laboratory experiment with democracy...

We consider estimating binary response models on an unbalanced panel, where the outcome of the dependent variable may be missing due to non-random selection, or there is self selection into a treatment. In the present paper, we first consider estimation of sample selection models and treatment...