Minimum wages decrease employment in competitive markets, but can increase it in monopsonistic markets so long as they do not exceed the marginal product of labour. We find evidence of non-monotonicity both by market structure and minimum wage level. Minimum wage hikes initially increase hours...

Monopsonists suppress employment and wages so as to avoid matching higher wages to their existing employees. Minimum wage hikes force them to pay their existing employees more, reducing the marginal cost of hiring and increasing both wages and employment. However, once the minimum wage exceeds...