Hi, When running an ordered logit, I get the following error: Error in as.matrix(x)[, -1] : incorrect number of dimensions As best I can discern, this is because the coef(d1t) command pulls the coefficients from the model, but not the values of the intercepts. While vcov(d1t) includes the intercepts. Is there a fix or workaround for this? Or am I doing something else wrong? Cheers, Evann ==================================== Evann Smith Ph.D. Candidate Department of Government Harvard University egsmith(a)fas.harvard.edu ====================================