Previously, he was Associate Professor of Economics at MIT and Stanford, and Professor of Economics at Columbia University (Barnard College and Columbia University Graduate Faculty of Arts and Sciences).
[2] His most-cited work was on Marxian economics and value theory, in particular his seminal book that put Das Kapital in a modern form, offering an accessible and rigorous introduction to Marx’s thought[3] – this work disrupted his path to tenure.
[4] However, at length he provides treatments of the history and theory of economics encompassing John Maynard Keynes, Hyman Minsky, David Ricardo, Jean-Baptiste Say, Adam Smith, and Piero Sraffa.
Indeed, his work ranges across such topics as economics, physics, ecology, money, complexity and statistical reasoning, and problems of social coordination.
In the field of fair division, he is considered the first to introduce the concept of envy-free resource allocation.