Nonparametric Estimates of the Labor-Supply Effects of Negative Income Tax Programs
利用西雅图/丹佛收入维持实验的随机分组数据，通过加权法计算负所得税对家庭劳动供给的非参数估计，但调查数据缺失导致结果存在歧义。
This article reports nonparametric estimates of the effect of labor-supply behavior on the payments to families enrolled in the Seattle/Denver Income Maintenance Experiment. The randomized assignment of families to the treatment groups in this experiment was designed to permit the calculation of these nonparametric estimates. However, the nonparametric estimates have never been reported, even though they are easy to construct using a simple weighting procedure. Unfortunately, responses to the data collection instrument (which depended on costly surveys) were not random, and this opens up some ambiguity in the results.