Hi there! Is there any command that allows the user to drop some special observations (for instance, those smaller than say 1000) from the sample you are using when running ols? I'd like to run several regressions on the same sample, but each of them with a shorter collection of data (dropping smaller observations more and more). Thanks a lot, d/ -- Daniel Arribas Department of Economic Analysis Faculty of Business and Economics University of Zaragoza (www.unizar.es) Gran Vía, 2 50005 Zaragoza Tel. 00 (34) 976–761-000 Ext. 4621 Mail: darribas(a)unizar.es