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信息是否影响同质性偏好?

Does information affect homophily?
Journal of Public Economics · 2023 · Yana Gallen、Melanie Wasserman

中文摘要

导师计划中常见依据种族、性别和国籍来匹配导师与学员。尽管此类计划颇为流行,但关于学员是否看重具有共同特征的导师,证据仍然很少。我们利用一个连接学生与校友的在线大学导师平台的新颖行政数据,发现女学生确实会不成比例地主动联系女性导师。我们考察女学生是否会为了获得女性导师而做出有代价的权衡。通过引出学生对导师属性的偏好,我们发现女学生愿意在职业匹配上做出权衡,以换取女性导师。当提供关于导师质量的信息时,这种为女性导师支付的意愿下降至零。证据表明,女学生利用导师性别来缓解信息问题,但并未从中获得直接效用。我们讨论了这些结果对基于共同特征进行匹配的举措设计的启示。

Abstract

It is common for mentorship programs to use race, gender, and nationality to match mentors and mentees. Despite the popularity of these programs, there is little evidence on whether mentees value mentors with shared traits. Using novel administrative data from an online college mentoring platform connecting students and alumni, we document that female students indeed disproportionately reach out to female mentors. We investigate whether female students make costly trade-offs in order to access a female mentor. By eliciting students’ preferences over mentor attributes, we find that female students are willing to trade off occupational match in order to access a female mentor. This willingness to pay for female mentors declines to zero when information on mentor quality is provided. The evidence suggests that female students use mentor gender to alleviate information problems, but do not derive direct utility from it. We discuss the implications of these results for the design of initiatives that match on shared traits.
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