This article offers a formal identification analysis of the problem in comparing coefficients from linear probability models (LPM) between groups. We show that differences in coefficients from these models can result not only from genuine differences in effects, but also from differences in one or more of the following three components: outcome truncation, scale parameters and distributional shape of the predictor variable. These results point to limitations in using LPM coefficients for group comparisons. We also provide Monte Carlo simulations and real examples to illustrate these limitations, and we suggest a restricted approach to using LPM coefficients in-group comparisons.
Quality & Quantity – Springer Journals
Published: Jul 26, 2014
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