Maureen Cropper, a professor of economics at the University of Maryland and a former lead economist at the World Bank, returned to RFF in 2008 as a senior fellow, a position she held from 1990 to 1993. Cropper has made major contributions to environmental policy through her research, teaching, and public service. Her research has focused on valuing environmental amenities, estimating consumer preferences for health and longevity improvements, and the tradeoffs implicit in environmental regulations. Previously, at the World Bank, her work focused on improving policy choices in developing countries through studies of deforestation, road safety, urban slums, and health valuation. She is currently studying the externalities associated with pandemic flu control, the impact of reforms in the electric power sector in India and the demand for fuel economy in the Indian car market.