Hello.
According to Hausman test (and test for normality of residuals) random
effects model is wrong (you should estimate fixed effects model).
Best wishes,
Mariusz
Hausman test -
Null hypothesis: GLS estimates are consistent
Asymptotic test statistic: Chi-square(15) = 113,98
with p-value = 2,76456e-017
Test for normality of residual -
Null hypothesis: error is normally distributed
Test statistic: Chi-square(2) = 339,203
with p-value = 2,20321e-074