TY - JOUR AU - Romer,Christina D. TI - Existing Estimates, New Estimates, and New Interpretations of World War I and its Aftermath JF - National Bureau of Economic Research Working Paper Series VL - No. 2187 PY - 1987 Y2 - March 1987 UR - http://www.nber.org/papers/w2187 L1 - http://www.nber.org/papers/w2187.pdf N1 - Author contact info: Christina D. Romer Department of Economics University of California, Berkeley 549 Evans Hall, #3880 Berkeley, CA 94720 Tel: 510/642-4317 Fax: 510/642-6615 E-Mail: cromer@econ.berkeley.edu AB - The paper examines the official Commerce Department estimates of gross national product for 1909-1928 and finds that they are far inferior to the less commonly used Kendrick GNP estimates. The paper then derives a revised version of the Kendrick series that alters significantly the representation of annual movements in the Kendrick series before 1919. This endorsement of a revised Kendrick GNP series in place of the official Commerce Department estimates before 1929 suggests new interpretations of the effect of World War I on the American economy and the nature and cause of the depression of 1921. ER -