Reconciling the evidence of Card and Krueger (1994) and Neumark and Wascher (2000)
使用原始数据和变化-变化估计量重新检验最低工资对就业的影响，发现争议性结果仅在小快餐店成立，并给出新解释。
We employ the original Card and Krueger (1994) and Neumark and Wascher (2000) data together with the changes-in-changes (CIC) estimator to re-examine the evidence of the effect of minimum wages on employment. Our study reconciles the controversial positive average employment effect reported by the former study and the negative average employment effect reported by the latter study. Our main finding, which is supported by both datasets, is that the controversial result remains valid only for small fast-food restaurants. This finding is accompanied with a new possible explanation.