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From |
SamL <saml@demog.berkeley.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: clogit problem |

Date |
Tue, 3 Sep 2002 07:29:23 -0700 (PDT) |

What is t2-t30, a set of time dummies? That may be the problem, I am not sure. Have you tried it without t2-t30? Hope this helps. A fellow berkeleyan. Sam On Mon, 2 Sep 2002, Laura Giuliano wrote: > Dear Statalisters, > > I am trying to estimate a fixed effects (conditional) logit model > predicting the probability that a newly hired employee in a given > establishment is white as a function of the hiring manager's race, > conditional on the number of white hires in the establishment. I have > many observations (typically over 100) per store and many positive outcomes > per establishment (also many negative ones). The race of the hiring > manager changes in many, but not all, establishments. There are about 1500 > establishments. > > After the first iteration, I get log likelihood = -8.988e+307, and stata > stops and prints out an empty table (see output below). > > I have had some success running the same regression using smaller > subsamples -- with fewer observations per store -- from the same data set. > > I'd greatly appreciate any explanations and/or suggestions. > > Thanks very much! > - Laura Giuliano > > . clogit white mblack mhisp masian mother t2-t30, group(store) > > note: multiple positive outcomes within groups encountered. > note: 114 groups (6827 obs) dropped due to all positive or > all negative outcomes. > Iteration 0: log likelihood = -8.988e+307 > > Conditional (fixed-effects) logistic regression Number of obs = 253398 > LR chi2(33) = . > Log likelihood = . Prob > chi2 = . > > ------------------------------------------------------------------------------ > white | Coef. Std. Err. z P>|z| [95% Conf. Interval] > -------------+---------------------------------------------------------------- > mblack | . . . . . > mhisp | . . . . . > masian | . . . . . > mother | . . . . . > t2 | . . . . . > t3 | . . . . . > > etc. > > > > --------------------------------------------------- > Laura Giuliano > Department of Economics > 549 Evans Hall, MC 3880 > University of California, Berkeley > phone: (510) 526-9490 > email: giuliano@econ.berkeley.edu > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: clogit problem***From:*Laura Giuliano <giuliano@econ.Berkeley.EDU>

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