This paper presents an analysis of workers who persistently have low earnings in the labor market over a period of three or more years. Some of these workers manage to escape from this low-earning status over subsequent years, while many do not. Using data from the Longitudinal Employer Household Dynamics (LEHD) program at the U.S. Census Bureau, the authors analyze the characteristics of persons and especially of their firms and jobs that enable some to improve their earnings status over time.