I had a phone interview with a Campus recruiter. The interview lasted roughly 30 minutes and was pretty laid back. I wasn't prepared for some of the questions though as I mistakenly assumed the first stage would have been more informative rather than behavioral. The questions focused mainly on past experiences using data and certain programs like STATA, which I've only really used two years ago the last time I took an Econometrics course so I stumbled a bit on that one. Overall, the interviewer was very friendly and it was a pleasant experience.