\begin{thread}
This is easier said than done, however.
These studies exploit natural experiments to measure causal effects, & have been enabled by improved data availability.
kfinlay.github.io/pdf/FinlayNeum…
papers.ssrn.com/sol3/papers.cf…
drive.google.com/file/d/18WJH0J…
docs.google.com/viewer?a=v&pid…
carolinaarteaga.com/job-market-pap…
dropbox.com/s/kjln6br7ord1…
web.stanford.edu/~sitian/sitian…
nber.org/papers/w24878.…