In CVS (but not yet in the GUI) we have a new command "duration" for estimating parametric duration models via ML. The default distribution is Weibull, but there are also --exponential, --loglogistic and --lognormal options. Right-censoring is supported. I've tested some examples against stata and get good agreement. I'm currently working on trying to get $yhat and $uhat to produce something sensible. Suggestions would be gratefully received. I'm having trouble grokking the discussions of generalized residuals for duration models that I've come across, and I can't make much sense of what stata produces with its "predict" function. Allin.