Centers at Harvard:  
Belfer Center for Science & International Affairs (Ec.& Global Affairs), JF blog;   
Center for International Development;    
M-R Center for Business & Government (incl. HEEP);   
Weatherhead Center for International Affairs  (incl. Politics & Economics of International Finance).

Other currently-affiliated institutions:
Council on Foreign Relations
Econofact
National Bureau of Economic Research

Centers in Europe:  
CREI, U.Pompeu Fabra, Spain.  
Kiel Institute of World Economics, Germany.
Vox.eu, CEPR, UK.
In Asia/Pacific: 
CAMA, ANU, Australia.
Center for Economic Research of Korea.

Past associations:
Bureau of Economic Analysis, Commerce Department
Council of Economic Advisers
Federal Reserve Bank of New York
Federal Reserve Board
International Monetary Fund
Massachusetts Institute of Technology - Economics Department
MPC of Bank of Mauritius
Peterson Institute for International Economics
Swarthmore College
University of California at Berkeley - Economics Department