Contracts versus Salaries in Matching
研究了当企业视合同为替代品时，合同谈判可简化为仅就工资进行谈判，这有助于理解匹配市场的稳定性。
Firms and workers may sign complex contracts that govern many aspects of their interactions. I show that when firms regard contracts as substitutes, bargaining over contracts can be understood as bargaining only over wages. Substitutes is the assumption commonly used to guarantee the existence of stable matchings of workers and firms.