When values of regressors are symmetrically disposed, many <italic>M</italic>-estimators in a wide class of models have a reflection property, namely, that as the signs of the coefficients on regressors are reversed, their estimators' sampling distribution is reflected about the origin. When the coefficients are...

This article notes that it is now practical to use the method of enumeration to analyse the performance of estimators and hypothesis tests of fully parametric binary data models. The general method is presented and then employed to investigate the power performance of a common misspecification...