Tracking the Returns to Education in the 1990s: Bridging the Gap between the New and Old Current Population Survey Education Items
针对1992年当前人口调查（CPS）教育项目变更导致的数据不连续问题，开发调整因子使前后收入可比，发现调整后大学/高中学历收入比增长大幅降低，对研究教育回报趋势的学者有直接参考价值。
The Current Population Survey (CPS) is used for many studies examining trends in the returns to education. The CPS changed its education item in 1992. This paper develops adjustment factors for earnings at different education levels to make pre- and post- 1992 earnings comparable. To accomplish this, contradictory results from alternative data sources are analyzed and, to the extent possible, reconciled. The adjustments reduce the estimated growth in the College/High School earnings ratio between 1989 and 1993 by between 29 and 48 percent for men and between 44 and 73 percent for women.