The Selection Effects of Part-Time Work: Experimental Evidence from a Large-Scale Recruitment Drive
通过在埃塞俄比亚的数据录入岗位大规模招聘中随机提供兼职或全职机会，发现兼职吸引的求职者资质较低、生产力较差，但更偏好短工时，这种选择效应可解释约一半的兼职工资惩罚（约25%）。
Abstract We implement a field experiment to examine how part-time work attracts applicants with different productivity than full-time work. In a large-scale recruitment drive for a data-entry position in Ethiopia, either a part-time or full-time job opportunity was randomly offered. We find that part-time work attracts less qualified applicants with lower productivity but stronger preferences for short work hours. Our estimates show this selection effect may explain about half of the typical part-time wage penalty, which is about 25%. A simple model demonstrates how lack of high-quality workers with strong preference for short work hours could explain the experimental findings.