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2008 Oct 03
1
Problem with glm.nb estimation
...models: > depEsf.nb <- glm.nb(depE ~ manuf00E + corps00E + lngdp00E + lngdp00sqE + > lnpop00E + indshE + scishE + mechshE + elecshE + chemshE + drugshE + > urban_dummyE + aggl_dummyE + + eE1 + eE2 + eE3 + eE4 + eE5 + eE6 + eE7 + eE8 + eE9 + eE10 + eE11 + eE12 + eE13 + eE14 + eE15 + eE16 + eE17, maxit = 100000) Warning messages: 1: In sqrt(1/i) : NaNs produced 2: In sqrt(1/i) : NaNs produced What does it mean to receive such a message? And, most of all, can I fix this problem? The only problem I could think of is that, for this particular case, I do not have lots of degrees of...