David P. Ellerman is an Associate Researcher at the School of Social Science, University of Ljubljana, Slovenia, and a Gordon Fellow at the Institute for Advanced Study, Stellenbosch, South Africa. In 2003 he retired to academia after 10 years at the World Bank where he was the economic advisor and speech-writer for the Chief Economist Joseph Stiglitz. In his prior university teaching, Ellerman taught over a twenty-year period in the Boston area in five disciplines: economics, mathematics, computer science, operations research, and accounting. He was educated at Massachusetts Institute of Technology (USA), and at Boston University where he has two masters degrees, one in philosophy and one in economics, and a doctorate in mathematics. Ellerman has published many articles in scholarly journals, as well as several books in economics, logic, mathematics, physics, philosophy, and law.