We establish strict stationarity and strong mixing properties of the dynamic Tobit process. Using these results we show that the regularity conditions for bias corrections in general non-linear dynamic panel models are satisfied for the dynamic Tobit model.

We investigate the estimation and inference in difference in difference econometric models used in the analysis of treatment effects. When the innovations in such models display serial correlation, commonly used ordinary least squares (OLS) procedures are inefficient and may lead to tests with...

We demonstrate analytically that for the widely used simultaneous equation model with one jointly endogenous variable and valid instruments, 2SLS has smaller MSE error, up to second order, than OLS unless the R², or the F statistic of the reduced form equation is extremely low. We also consider...