[dragonwriter]

> b)Economists Giovanni Peri, Kevin Shih and Chad Sparber notes “A 1 percentage point increase in the foreign STEM share of a city’s total employment increased the wage growth of native college-educated labor by about 7–8 percentage points and the wage growth of non-college-educated natives by 3–4 percentage points.”

I don't doubt this correlation, but I do doubt that the relationship is causal in the direction suggested. More likely higher less supply of naive work to meet the needs of local industry -> both higher native wages and greater effort toward and eligibility for visa sponsorship for foreign workers.