Job Differentiation and Wages
研究企业如何设定工资和技能要求，发现固定技能要求时存在纳什均衡但效率低；若企业同时选择技能要求和工资，则纯策略纳什均衡不存在。
The determination of wage rates and skill requirements for jobs is studied in a model where workers, who vary in ability, acquire skill through (costly) training. If firms' skill requirements are fixed, there exists a unique Nash equilibrium in wage rates, but the resulting allocation of labor is inefficient. The Nash equilibrium wage rates and allocation of labor approach the competitive equilibrium if and only if the number of job types increases on every skill range and no firm remains a monopsonist on any skill range. If firms choose both skill requirements and wage rates, no Nash equilibrium in pure strategies exists.