Social and spatial networks in labour markets
综述了劳动力市场中推荐（referrals）的使用与影响，讨论了其对就业结果、社会福利和政策制定的意义，并指出未来研究应利用新数据并与宏观劳动研究结合。
Abstract Social connections and referrals are ubiquitous in the labour market, both on the job-seeker side and on the employer side. This article reviews recent developments in the study of referrals, highlighting what we have learned regarding the use and impact of referrals on various labour market outcomes and pointing out the increasingly nuanced picture we are gaining on the effects of referrals. It then discusses directions for future research, emphasizing the importance of using newly available data (and combinations of datasets) and of making tighter connections with the burgeoning macro-labour research that is based on a search and matching framework. Finally, it evaluates the role of referrals from the point of view of policy-makers, discussing their social welfare implications and ways in which they could be explicitly incorporated into various labour market policies. The importance of tighter collaboration between policy-makers, researchers, employers and practitioners is stressed, to conduct more rigorous experimentation and evaluation of potential referral-based policies and programmes.