Hi zelig folks, I'm trying to run a set of probit regressions with robust standard errors, but I repeatedly get the following error message: Error in glm.control(robust = TRUE) : unused argument(s) (robust = TRUE) I can't figure out what the problem is. The sandwich package is loaded. An example of the code I am using is below. Many thanks, Shar z.out <- zelig(binary_iv ~ age + educ + income_new + gender_new + white + black + hispanic + union_member + dem + rep + indep + tv_foreign + ecknow + import_mfg, model="probit", robust = TRUE, data = data) - -- Zelig Mailing List, served by HUIT Send messages: zelig(a)lists.gking.harvard.edu [un]subscribe Options: http://lists.gking.harvard.edu/mailman/listinfo/zelig Zelig program information: http://gking.harvard.edu/zelig/ Zelig mailing list Zelig(a)lists.gking.harvard.edu https://lists.gking.harvard.edu/mailman/listinfo/zelig