I applied through college or university. The process took 4 weeks. I interviewed at Cornerstone Research (New York, NY) in Oct 2021
Interview
First round interview was two 30 minute interviews, each had a behavioral portion and a case portion. Final round interviews had similar format, but with four 45 minute interviews. Decision process was very slow; it took several weeks.
Interview questions [1]
Question 1
Case questions focus on building and interpreting regressions for particular scenarios