The most counterintuitive finding: cutting H-1B quotas didn't help American workers, but it did make the remaining H-1B pool less innovative. Employment losses were heaviest at both the lowest AND highest wage levels, filtering out the most exceptional talent while concentrating visas among mid-skill workers and Indian-born computer workers due to network effects.
Classic unintended consequence -- the policy achieved neither goal. Opponents didn't get more jobs for Americans, supporters lost the highest-impact innovators who drive patents and startups.