Neumark, Salas, and Wascher (2014) succinctly summarize the empirical challenges researchers of the minimum wage face: "the identification of minimum wage effects requires both a sufficiently sharp focus on potentially affected workers and the construction of a valid counterfactual control group...

Neumark, Salas, and Wascher (2014) succinctly summarize the empirical challenges researchers of the minimum wage face: "the identification of minimum wage effects requires both a sufficiently sharp focus on potentially affected workers and the construction of a valid counterfactual control group...