How can we identify outliers by case number in Stata?
The ATS page on regression diagnostics covers how to identify outliers by case number using the LIST and IN commands. That page can be found here: http://www.ats.ucla.edu/stat/stata/webbooks/reg/chapter2/statareg2.htm There are many ways to delete the cases with outliers, one of them being: PREDICT R, RSTANDARD DROP IF R<-2.5 DROP IF R>2.5 This deletes cases with standardized residuals less than -2.5 and greater than 2.5. (Some people prefer to use different cutoff points, such as -3.0 and 3.
