Do Immigration Quotas Benefit Natives?

From Jeffrey Miron.

"In 1921 and 1924, Congress set nationality-based quotas for immigration.

Recent research looks at the impact

on the intergenerational mobility of US-born men. [The authors use] county-level measure[s] of exposure to the quotas … [and] census data … to link US-born sons to their adult outcomes and trace family background, geographic location, and occupational status over time.

Outcomes differed by race:

[T]he quotas slowed intergenerational mobility among US-born white men. … For [them] the negative effects of the quotas were smaller for sons of wealthier fathers. … US-born white men from more exposed counties [also] earned substantially lower wages in adulthood.

Alternatively,

[f]or black men, quota exposure was associated with increased intergenerational mobility, although [the results] … cannot rule out the possibility of no effect. [T]he quotas may have reduced competition for lower-skilled urban jobs, modestly improving occupational prospects for black men.

The most likely explanation for the quotas’ effects

is that immigrants complement native workers by raising their productivity and enabling them to specialize in higher-quality tasks. … [Indeed,] the negative mobility effects were nearly twice as large for white men living in counties with more reliance on non-English-speaking immigrant workers."