Many workers receive pay based on subjectively assessed performance, yet the shirking model of efficiency wages excludes it. This paper incorporates such pay, with the following results. Performance pay is more efficient than efficiency wages when the costs of having a job vacant are low and...

The implications for labor markets of contracts to avoid hold-up of investments are assessed. Employment at will protects the returns on a firm's general and specific investments without wages increasing with tenure. With turnover costs, fixed but renegotiable wages can protect general...