Dear all,
I have a panel data set of a study where 69 individuals were observed over 8 points in time with regards to several questions (unbalanced panel with an average of 7.1 observations per individual, number of obs = 492). According to the Hausman test, I should use the random effects model over the fixed effects model. What I was wondering now is whether I should use -vce(cluster participant)- in order to relax the independence assumption i.e. that observations of the same individual may be correlated over time.

Can somebody help me with this issue?

Thank you very much in advance!

Melina