Erly <[email protected]> is observing the following behavior from
-asclogit-.
> asclogit use km2kd price, case(pidlink) alternatives(mode)
> casevars(age male married hs1 hs2 educ2 educ3 educ4 expmcapth region2
> region3 hhsize employment adlindex serill) nolog collinear
> note: model has collinear variables; convergence may not be achieved
> convergence not achieved
>
> Alternative-specific conditional logit Number of obs = 2264
> Case variable: pidlink Number of cases = 566
>
> Alternative variable: mode Alts per case: min = 4
> avg = 4.0
> max = 4
>
> Wald chi2(44) = .
> Log likelihood = -368.13846 Prob > chi2 = .
>
> ------------------------------------------------------------------------------
> use | Coef. Std. Err. z P>|z| [95% Conf. Interval]
> -------------+----------------------------------------------------------------
> convergence not achieved
>
This looks like a display bug. If my counting is correct, the table should
have 50 coefficents (2 a.s. coefficients, 45 c.s., and 3 constant terms) and
at least 3 coefficents (47-44) would have missing values, but the display ado
code is terminating early. I do not see anything obvious in the display code
that would cause this, nor can I recreate it. Perhaps something did not get
cached properly in -ereturn-. If Erly could send me the data and a -do- file
that recreates the problem it would make it easier investigate.
-Rich
[email protected]
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