Dear R users I have two questions, I have been on this problem for last 3 months, please help First question: *How can I use the lmer function for a three level probit ( ie please help me with the command syntax)?* The second question is, *how can I then subsequently calculate the Inverse Mills ratio after the above probit is calculated using lmer?* Is there any other way (if lmer does not do this) to get IMR of a 3 level probit Kindly help Thanks Saurav -- Dr.Saurav Pathak PhD, Univ.of.Florida Mechanical Engineering Doctoral Student Innovation and Entrepreneurship Imperial College Business School s.pathak08@imperial.ac.uk 0044-7795321121 [[alternative HTML version deleted]]