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The Role of Referrals in Immobility, Inequality, and Inefficiency in Labor Markets

SIEPR
Jan 2021
Working Paper
21-005
By  Lukas Bolte, Nicole Immorlica, Matthew O. Jackson
We study the consequences of job markets’ heavy reliance on referrals. Referrals screen candidates and lead to better matches and increased productivity, but disadvantage job seekers who have few or no connections to employed workers, leading to increased inequality. Coupled with homophily, referrals also lead to immobility: a demographic group’s low current employment rate leads that group to have relatively low future employment as well. We identify conditions under which distributing referrals more evenly across a population not only reduces inequality, but also improves future productivity and economic mobility. We use the model to examine optimal policies, showing that one-time affirmative action policies involve short-run production losses, but lead to long-term improvements in equality, mobility, and productivity due to induced changes in future referrals. We also examine how the possibility of firing workers changes the effects of referrals.
Publication Keywords: 
Inequality
Immobility
Job Contacts
Job Referrals
Social Networks
Networks
Productivity