immigrants already employed, while the marginal effect on average firm wages is positively associated with the share of immigrant …

markets, based on federal merger scrutiny guidelines, and that concentration generally decreases wages. For example, moving … from a market with an HHI of zero to a market comprised of two employers lowers H-1B worker wages approximately 10 percent …, and a pure monopsony (one employer) reduces wages by 13 percent. A simulation shows that wages under pure monopsony could …

employment and wages in the United States. Guided by a pre-analysis plan, we document that COVID-19 increased the unemployment …