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I model the emergence of job referral networks as an endogenous response to local labor market conditions. The density of the job referral network workers use to share job information is determined in general equilibrium, along with unemployment, vacancies, and earnings. To make the referral network endogenous, I introduce the concept of network balance as an equilibrium condition linking individual search decisions to aggregate network structure. In equilibrium, referral networks are mostdoi:10.2139/ssrn.2234125 fatcat:2od2txhp4rb4jepy57slsca2bi