As policy makers have placed an increasing focus on training and preparing workers to obtain postsecondary credentials, questions remain about the value to various actors, especially for job seekers and workers who often invest time and money to obtain a credential with the hopes of improving their employment prospects and raising their earnings. This report begins to address this issue. Drawing on data from the randomized control trial of the Sectoral Employment Impact Study (SEIS), which included three sector-focused training programs, the authors explore whether individuals who obtain credentials work more and earn more over time than they would without such credentials. In Section 1, the authors describe sector-focused training programs, the individuals in the study. In Section 2, the authors describe the specific credentials provided to the program participants and explore the value of credentials using a statistical technique called instrumental variable (IV) and highlight three findings. Section 3 outlines conclusions and some essential caveats. All values stated in this report are in 2014 dollars, unless explicitly noted. [This report was co-produced by the Workforce Strategies Initiative (WSI) at the Aspen Institute.]