80,000 Hours has some research on this. They do have a lot of caveats, but they may help! https://80000hours.org/2019/05/why-do-organisations-say-recent-hires-are-worth-so-much/
80,000 Hours has some research on this. They do have a lot of caveats, but they may help! https://80000hours.org/2019/05/why-do-organisations-say-recent-hires-are-worth-so-much/