Marriage and Earnings
实证研究婚姻与工资的关系，认为婚姻传递了雇主看重的个人特质（如能力、忠诚等），若不控制固定效应与婚姻的相关性，婚姻状态系数会被高估。
An empirical investigation of the relationship between marriage and wages, arguing that marriage signals certain unobservable individual characteristics - including ability, honesty, loyalty, dependability, and determination - which are valued by employers, and that failure to control for the correlation of the fixed effects with marriage leads to an upward bias in the marital status coefficient.