Third, in a weak job market long-term unemployment tends to be self-perpetuating, because employers in effect discriminate against the jobless. Many people have suspected that this was the case, and last year Rand Ghayad of Northeastern University provided a dramatic confirmation. He sent out thousands of fictitious résumés in response to job ads, and found that potential employers were drastically less likely to respond if the fictitious applicant had been out of work more than six months, even if he or she was better qualified than other applicants.