In total, the authors responded to more than 1,300 employment ads in the sales, administrative support, clerical, and customer services job categories, sending out nearly 5,000 resumes. The ads covered a large spectrum of job quality, from cashier work at retail establishments and clerical work in a mailroom to office and sales management positions.
The results indicate large racial differences in callback rates to a phone line with a voice mailbox attached and a message recorded by someone of the appropriate race and gender. Job applicants with white names needed to send about 10 resumes to get one callback; those with African-American names needed to send around 15 resumes to get one callback. This would suggest either employer prejudice or employer perception that race signals lower productivity.
The 50 percent gap in callback rates is statistically very significant, Bertrand and Mullainathan note in Are Emily and Greg More Employable than Lakisha and Jamal? A Field Experiment on Labor Market Discrimination (NBER Working Paper No. 9873). It indicates that a white name yields as many more callbacks as an additional eight years of experience. Race, the authors add, also affects the reward to having a better resume. Whites with higher quality resumes received 30 percent more callbacks than whites with lower quality resumes. But the positive impact of a better resume for those with Africa-American names was much smaller.