>"Since the cap was tightened in 2004, firms hired between 20 and 50 percent fewer new H-1B workers than they might have hired had it remained at 195,000 visas per year."
> "The researchers find, however, that the reduced pool of foreign workers did not lead firms to hire more Americans, and conclude that this suggests "low substitutability between native-born and H-1B workers in the same skill groups."