In May 2001, 7.8 million people in the United States (5.7% of U.S. workers) worked multiple jobs. The May 2001 Current Population Survey asked multiple jobholders their main reason for holding more than one job. These percentages of respondents gave the following reasons: to meet expenses or pay off debt, 27.8%; to earn extra money, 35.4%; to build a business or get experience in a different job, 4.6%; enjoy the second job, 17.4%; other reasons, 12.5%; and reason not available, 2.3%. Young workers (aged 16-24 years) were more likely to work multiple jobs to earn extra money than were workers aged 25 or older. The share of adults who moonlighted in order to build a business or get experience in a second job decreased with age, and the share of workers who moonlighted because they enjoyed the second job tended to decrease with age. The number of white individuals who reported working multiple jobs because they enjoyed the second job was nearly double the number of blacks and was 7 percentage points higher than the number of Hispanics citing the same reason. One-third of blacks and more one-fourth of whites moonlighted to meet expenses or pay off debt. Fewer workers were moonlighting in May 2001 than in May 1997. (MN)