Effects of Rotation Group Bias on Estimation of Unemployment
分析当前人口调查中轮换组偏差对失业估计的影响，发现若偏差包含乘法成分，则比率估计量和复合估计量均有偏，并给出质疑纯加法模型的实证结果。
Previous analysis of rotation group bias in the Current Population Survey has concluded that if the biases are additive, the ratio and composite estimators of month-to-month change in unemployment are unbiased. This article shows that if the biases contain a multiplicative aspect, both estimators of change are then biased. The article also presents some empirical results that cast doubt on the validity of a purely additive model.