Comment by rayiner

How many promising American-born researchers are we missing out on because we give away valuable training and research opportunities to foreigners?

Don’t forget that America’s technological heyday—when Silicon Valley was built in the first place—came during and shortly after the Johnson Reed era of immigration restriction. Companies like Apple, Intel, etc., were founded between 1960-1980 (the decade on each side of when the foreign born population hit the historical low in 1970).