When analyzing panel data using regression models, it is often reasonable to allow for time-varying covariate effects …. We propose a novel approach to modelling timevarying coefficients in panel data regressions, which is based on penalized …

performance of homogenous panel unit root tests in the presence of permanent volatility shifts. It is shown that in this case …, panel unit root tests derived under time invariant innovation variances lose control over actual significance levels while … hypothesis. -- Panel unit root tests ; variance breaks ; cross sectional dependence ; Fisher hypothesis …

panel unit root tests. Whereas obtaining mixed evidence for the US differentials, the results on German differentials all …

and developing countries grouped in panels by similar characteristics. Panel long-run causality is assessed with a …

crises ; Current account reversals ; Treatment Model ; Discrete dependent variable ; Efficient Importance Sampling ; Panel …