Referrals and Search Efficiency: Who Learns What and When?
研究了推荐在招聘过程中如何改善筛选和自选择，发现推荐能吸引高绩效申请者，但绩效差异随任职时间因选择性离职而缩小。
Referrals can improve screening and self-selection of applicants during the hiring process. We model and estimate how referral information affects the selection of employees through job offers, acceptances, and turnover. Using data from a call center company, we show that referrals help employers attract applicants of superior performance. Yet performance differences between referred and nonreferred workers diminish with tenure through selective turnover. Our estimates reveal that referrals allow employers to screen on hard-to-observe but performance-relevant attributes for employees of high performance and high propensity to stay. Thus, referred applicants complete much of the sorting during the hiring process.