American economist, teacher. Professor of economics at Berkeley, 1903-1912, and at Columbia University, 1913-1919 and 1922-1944; a founding faculty member of the New School for Social Research, 1919-1922; and the founder and director of the National Bureau of Economic Research, 1920-1945. In 1912, he married Lucy Sprague, educator and founder of Bank Street College of Education.

Professional correspondence, diaries, unpublished articles, lecture notes, abstracts, and other manuscripts by Mitchell. Subjects include economic theory and its history, business cycles, money, national planing, anthropology and psychology, and published material by Mitchell and others. Abbreviations: AAAS American Association for the Advancement of Science AEA American Economic Association ASA American Statistical Association BASM The Backward Art of Apending Money BC Business Cycle; (13) denotes 1913 volume, (27) denotes 1927 volume BC "Business Cycles" course BCU Business Cycles and Unemployment EC "Economic Change" course EH "Economic History" course EO "Econimic Origins" course GPW Gold, Prices, and Wages under the Greenback Standard HG A History of Greenbacks HP History of Prices Dirung the War ILO International Labor Organization ISI International Statistical Institute LSM Lucy Sprague Mitchell (wife) M "Money" course MBB Measuring Business Cycles ME "Money Economy" course MUNI Making and Using Index Numbers NB National Bureau of Economic Research NRB National Resources Board NRC National Resources Committee SSRC Social Science Research Council TP "Types of Economic Throey" copurse WCM Wesley Clair Mitchell WHDBC What Happens during Business Cycles