His research on estrogen carcinogenesis has been continuously funded through grants from the US National Institutes of Health (NIH) since 1978. He is the author or co-author of over 200 publications, book chapters and abstracts and has trained a numerous doctoral and postdoctoral students. Dr. Yager has served on a variety of research-related advisory boards and review panels, including various NIH grant, program project, center and doctoral training program review panels. He served on the National Academies of Science/National Research Council Committee on Toxicity Testing and Assessment of Environmental Agents which published two reports, the second of which presented a new, innovative paradigm for the toxicity testing process in the context of risk assessment. Dr. Yager is also on the editorial boards of several scientific journals. As the senior associate dean for academic affairs from July 2000 - June 2013, Dr. Yager was responsible for overseeing, facilitating, and coordinating existing, and development of new academic, training, and continuing education programs in the School of Public Health. Dr. Yager oversaw the School’s large, highly rated on-line education infrastructure and programs. Working with members of the School’s faculty, he was instrumental in facilitating the development and funding of the School’s Open CourseWare program, which provides the free availability of the content of over 100 of the School’s courses to individuals throughout the world who desire access to this knowledge for self-improvement, use in teaching, or use in their professions. Individuals from over 120 countries now visit the School’s OCW web site. He was influential in facilitating development of the School’s partnership with Coursera, a company that offers Massive Open Online Courses (MOOCs) at no charge. Faculty currently offer 16 courses and enrollments have now exceeded 500,000. In collaboration with faculty and the Pan American Health Association, Dr. Yager facilitated development of a novel internet-based certificate program in Spanish titled “Certificate Program in Epidemiology for Public Health Managers”.