Hi everyone, I'm doing a research for my thesis about OECD countries, I've done some regressions and now I'm doing Hausman Test and Breusch and Pagan Test. My professor told me to do xttest0 to study
heteroskedaticity, but isn't better hettest to study that? Also i can't understand what xttest0 is useful for.
From the hausman test emerges that is better a fixed model right? From hettest emerges that there is heteroskedaticity, but from xttest0 that there aren't individual effects?
Thank you, I'm a beginner.