b = consistent under Ho and Ha; obtained from mlogit
B = inconsistent under Ha, efficient under Ho; obtained from mlogit
Test: Ho: difference in coefficients not systematic
chi2(17) = (b-B)'[(V_b-V_B)^(-1)](b-B)
= -8.38 chi2<0 ==> model fitted on these
data fails to meet the asymptotic
assumptions of the Hausman test;
see suest for a generalized test
求指教啊,最后的结果是这样的,该怎么办
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