They probably just used a logit model, as Stata doesn't support fancy ML algorithms. What puzzles me though, is that I don't see ANY reason for using alal of t

They probably just used a logit model, as Stata doesn't support fancy ML algorithms. What puzzles me though, is that I don't see ANY reason for using alal of these tools together (Stata, R, SAS, etc.) and the code taking one hour to run in a big computer.