1950 to 1970 is fascinating.<p>US foreign born is 6% at the beginning. 18% at the midpoint. Then 4% at the end.<p>a) what caused this rapid spike and retreat?
b) are there or why aren&#x27;t there a million econ studies about immigration studying this time period?<p>Note: I got as far as Wikipedia&#x27;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.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;History_of_immigration_to_the_United_States#1950s" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;History_of_immigration_to_the_...</a>