Credentials and Wage Discrimination
研究了在工人拥有私人信息（保留工资和获取资质证书的成本）且雇主为垄断买方的情况下，工资歧视是否有利可图。数值例子显示，即使工人生产率相同，工资歧视也不盈利。
The subject is wage discrimination among workers with differing privately-known reservation wages and costs of obtaining "credentials" that can be observed by a monopsonist firm. Numerical examples are studied in which workers are equally productive, and in the population their reservation wages and credentialing costs have a normal distribution with negative correlation. According to these examples, wage discrimination is unprofitable. Copyright 1988 by The editors of the Scandinavian Journal of Economics.