On the Trade-off between Efficiency in Job Assignment and Turnover: The Role of Breakup Fees

摘要

We highlight a novel trade-off with the use of breakup fees in employment contracts. Under asymmetric learning about workers' productivity, the market takes job assignments (or "promotions") as a signal of quality and bids up the wages of a promoted worker, leading to inefficiently few promotions (Waldman, M. 1984. "Job Assignments, Signalling, and Efficiency" 15 RAND Journal of Economics 255-67). Breakup fees can mitigate such inefficiencies by shielding the firm from labor-market competition, but they reduce turnover efficiency when there are firm-specific matching gains. We show that it is optimal to use breakup fees if and only if the difference between the worker's expected productivity in the pre- and post-promotion jobs is small. Also, the relationship between the optimality of breakup fees and the importance of firm-specific human capital is more nuanced than what the extant literature may suggest.