Survival analysis
If you are a Stata user with lots of experiences of conducting statistical and econometric analysis but have never learned survival analysis before, An Introduction to Survival Analysis Using Stata, written by Mario A. Cleves, William W. Gould, and Roberto G. Gutierrez is the best way to go through a crash course of survival analysis on your own. I've never read any textbook of statistics or econometrics as easy to follow and practical as this one.