A note on the robustness of Card and Krueger (1994) and Neumark and Wascher (2000)

This note adds to the discussion originating from Card and Krueger (Am Econ Rev 84:772–793, 1994 ) and Neumark and Wascher (Am Econ Rev 90:1362–1396, 2000 ) by re-evaluating their results using the semiparametric difference-in-differences estimator introduced in Abadie (Rev Econ Stud 72:1–19, 2005 )...

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