Professor of Economics at the Xochimilco Campus of the Universidad Autónoma Metropolitana in México City. He received his doctorate in economics from Yale University and was awarded the National Prize in Political Economics in 1979 for his analysis of inflation in Mexico. He is a member of the Mexican Academy of Sciences and of the National Research Council. In 1974, he was a founding member of the Ecodevelopment Center. His most recent books include: Wealth, Poverty and Sustainable Development and Innovaciones Mexicanas en el Manejo del Agua. (Mexican Innovations in Water Management) He is interested in the process of unequal development that creates profound imbalances throughout society and promotes environmental degradation. His recent research focuses on the implementation of alternative strategies for the sustainable management of resources. Much of his work is conducted in collaboration with local communities and regional citizens' groups.