Correlated Random Effects - Hausman Test 
Pool: GROWTH 
Test cross-section random effects 
 
Test Summary Chi-Sq. Statistic Chi-Sq.d.f. Prob. 
 
Cross-section random 0.000000 5 1.0000
 
* Cross-section test variance is invalid. Hausman statistic set to zero. 
** Warning: robust standard errors may not be consistent with 
 assumptions of Hausman test variance calculation. 
 请问这个结果什么意思啊?P=1? Chi-Sq=0? 后面这句话什么意思啊?