1950 to 1970 is fascinating. US foreign born is 6% at the beginning. 18% at the midpoint. Then 4% at the end. a) what caused this rapid spike and retreat? b)

1950 to 1970 is fascinating. US foreign born is 6% at the beginning. 18% at the midpoint. Then 4% at the end. a) what caused this rapid spike and retreat? b) are there or why aren't there a million econ studies about immigration studying this time period? Note: I got as far as Wikipedia's immigration to the US in the 1950s section, which is more a list of random unconnected facts, none of which seem to line up well enough to explain the tentpole. Maybe rising Mexican immigration and the Hungarian revolution, followed by a new system of immigration no one knew how to use... not really sure. https://en.wikipedia.org/wiki/History_of_immigration_to_the_United_States#1950s https://en.wikipedia.org/wiki/History_of_immigration_to_the_...