The National Bureau of Economic Research (NBER) is an American private nonprofit research organization "committed to undertaking and disseminating unbiased economic research among public policymakers, business professionals, and the academic community." The NBER is well known for providing start and end dates for recessions in the United States.
The NBER is the largest economics research organization in the United States. Many of the American winners of the Nobel Prize in Economics were NBER Research Associates. Many of the Chairmen of the Council of Economic Advisers have also been NBER Research Associates, including the former NBER President and Harvard Professor, Martin Feldstein.