I recently applied to an economics pre-doctoral RA opportunity at a North American research university. I was asked to do a 7-hour empirical exercise, which I did (took me closer to 10 hours). Unfortunately, I was not asked to proceed in the interview process.
I did ask for feedback (or just the solution set for the empirical exercise), because I wanted to figure out where I went wrong and how I can do better the next time around, but the hiring manager informed that they aren't able to provide any kind of feedback.
I found this to be extremely frustrating and somewhat annoying -- I don't care that I didn't get the job, but I think it's wrong to ask applicants to perform many hours of uncompensated labor and not even provide an answer key! Is this the wrong way to think about things?
Really appreciate any insight or guidance you might have.