How immigrants shape institutions
We now have the key pieces of the puzzle:
The Deep Roots literature which shows that in the long run, migration deeply shapes a nation’s level of pro-market institutions, and that a nation’s ancestry-adjusted SAT score (States, Agriculture, Technology) is a good predictor of prosperity.
The Attitude Migration literature, which shows that migrants bring a substantial portion of their attitudes toward markets, trust, and social safety nets with them from their home country.
The New Voters = New Policies literature, which shows that governments really do change when new voters show up, and that the changes start to show up in just a few years.
http://evonomics.com/do-immigrants-import-their-economic-destiny-garrett-jones/
Immigrants - legal/illegal/welcomed/or not - bring their cultures with them. How will the mass migration of the current era change the host countries? It's a question that seems pretty much verboten to ask, but surely any discussion of immigrantion policy is uninformed if the question is ignored.