?David Ellerman is an Associate Researcher at the Faculty of Social Science, University of Ljubljana, Slovenia. 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 seven previous books and many articles in scholarly journals in economics, logic, mathematics, physics, philosophy, and law.