Dr. Shepherd's research interests lie in the major areas of the economics of pharmacy services, pharmaceutical marketing, importation of pharmaceuticals, prescription drug diversion, counterfeit medications, managed care pharmacy and pharmacoeconomics.He has an intense interest in conducting research that examines the policies related to drug importation and re-importation, especially from Mexico, the use of drug anti-counterfeiting strategies and techniques for monitoring prescription drug diversion. He is also involved in conducting research on the economics of pharmacy practice, such as cost of dispensing, prescription drug pricing issues, the extent of generic drug use and other policies which affect drug use within the Medicaid population. Dr. Shepherd also enjoys pharmaceutical marketing research, especially measuring the impact of direct-to-consumer drug advertising.