Adolfo García de la Sienra Guajardo has been research fellow at the Philosophy Institute of the Veracruzana University since 2002, and professor of Game Theory, Microeconomics and Mathematical Economics at the Faculty of Economics of the same university since 1998. He was professor of microeconomics at the Center for Research and Teaching of Economics in Mexico City since 1983 to 1988. Dr. García de la Sienra has published more than one hundred papers and books in international journals and publishing houses. Beside a book on the logical foundations of the Marxian Theory of Value published by Springer (then Kluwer), and an anthology on the philosophy of religion, Dr. García de la Sienra has published A Structuralist Theory of Economics in Routledge. His main fields of interest is the logic, methodology and philosophy of economics. He is member of the International Network of Economic Method.