Hausman test for multilevel model

I want to make a Hausman test, to test wether my mixed effects model is different from a fixed effects model. The model consists of an association between Education and Social Distance moderated by regimetype, followed by various control variabels.

My model is the following.
mixed socialdistance ib(1).Educ##c.DemSc Arbejdsløshed bnpindbyg Migration5y GINI ||Nationer:, covariance(independent) reml

How do i make a Hausman test for this model?