The equivalence of two estimators of the fixed-effects logit model

This note shows that the scale-adjusted maximum likelihood estimator suggested by a result of [Andersen, 1973. Conditional inference and models for measuring. Mentalhygiejnisk Forlag, Copenhagen.] is equivalent to the conditional logit estimator of [Chamberlain, 1980. Analysis of covariance with qualitative data. Review of Economic Studies 47, 225–238.] for the fixed-effects logit model with two time periods. © 1997 Elsevier Science S.A.