The Research Triangle Institute offers a range of drug discovery and health, survey, energy and environmental research services. The institute is also engaged in the economic modeling of environmental policies. The Research Triangle Institute assesses the monetary benefits of policies designed to enhance ecological services. The institute s clients include the Department of Homeland Security, Department of Housing and Urban Development and Department of Justice, Boehringer Ingelheim, Chevron Corporation, Elan Pharmaceuticals, Eli Lilly and Company and Inspire Pharmaceuticals. It provides statistics research an international development services. The Research Triangle Institute maintains a work force of more than 2,800 employees. The institute has operations in over 40 countries. Its subsidiaries include RTI Health Solutions and MasiMax Resources.