James Tobin Professor of Economics, Yale University 1994-
Professor of Economics, Yale University, 1986-1994
Associate Professor of Economics, Yale University, 1983-1985
Assistant Professor of Economics, Yale University, 1980-1982
Director, Cowles Foundation for Research in Economics, 1996-2005
Senator, Yale Faculty of Arts & Sciences 2015-
Co-Founder, Hellenic Studies, Yale University, 2002-
Co-Director, Hellenic Studies, Yale University, 2002-
Chairman, Santa Fe Institute Science Steering Committee, 2009-2015
Director, Santa Fe Institute Economics Program, 1999-2000; Co-Director 1990-1991
External Professor, Santa Fe Institute, 1991-
Santa Fe Institute Science Steering Committee, 2006- 2009
New York Fed Liquidity Group, 2009-2010
New York Fed President’s Roundtable Advisory Group, 2010-2016
Trustee, Hopkins School, 2007-