Some Contacts Are More Equal than Others: Informal Networks, Job Tenure, and Wages
探讨了通过非正式关系找到工作的工人任期更长的两种解释：关系人减少匹配不确定性，或工人因缺乏选择而被迫留任。研究发现两种解释对不同类型关系同时成立，并影响工资效应。
The explanation typically given for longer tenure among workers who use informal contacts to find jobs is that relatives and friends reduce uncertainty about the quality of the match between worker and employer. An alternative explanation is that workers rely on informal information sources as a last resort. Such workers remain at their current jobs mainly because they have few alternative choices rather than because of better match quality. This article shows that the two different explanations are simultaneously valid for different types of contacts and can account for differences in the wage effects of job contacts.