please when i run Hausman test test , it appear for me this sign, what it means and how i can solve it how can i solve it
Test of H0: Difference in coefficients not systematic
chi2(35) = (b-B)'[(V_b-V_B)^(-1)](b-B)
= -79.89
Warning: chi2 < 0 ==> model fitted on these data
fails to meet the asymptotic assumptions
of the Hausman testtest; see suest for a
generalized test.
