. xtpoisson updatepattotal lnasset age roa lnrdexp updateexperience politiesrate ownershiprate slack martotal industryc5 industryc8 pr1 pr2 pr3 pr4 pr5,fe nolog
note: 4 groups (4 obs) dropped because of only one obs per group
note: 1 group (6 obs) dropped because of all zero outcomes
note: industryc5 dropped because it is constant within group
note: industryc8 dropped because it is constant within group
Conditional fixed-effects Poisson regression Number of obs = 762
Group variable: no Number of groups = 142
Obs per group: min = 2
avg = 5.4
max = 6
Wald chi2(13) = .
Log likelihood = -10460.98 Prob > chi2 = .
---------------------------------------------------------------------------------
如上Wald chi2(13) = .
Prob > chi2 = .
都为空缺值。求教,很急~ 谢谢各位大大