%S TSE Working Paper %A Christophe Gaillac %A Éric Gautier %T Non Parametric Classes for Identification in Random Coefficients Models when Regressors have Limited Variation %X This paper studies point identification of the distribution of the coefficients in some random coefficients models with exogenous regressors when their support is a proper subset, possibly discrete but countable. We exhibit trade-offs between restrictions on the distribution of the random coefficients and the support of the regressors. We consider linear models including those with nonlinear transforms of a baseline regressor, with an infinite number of regressors and deconvolution, the binary choice model, and panel data models such as single-index panel data models and an extension of the Kotlarski lemma. %K Identification %K Random Coefficients %K Quasi-analyticity %K Deconvolution %B TSE Working Paper %V 21-1218 %D 2021 %C Toulouse %I TSE Working Paper %L publications43568