TINBERGEN,J. Statistical Testing of Busi ness-Cycle Theories. Vol. I,A Method and its Application to Investment Activ ity,pp. 164,90¢;Vol. II,Business Cy cles in the United States of America 1919-1932,pp. 244,$1.25. New York: Columbia University Press,1939

TINBERGEN,J. Statistical Testing of Busi ness-Cycle Theories. Vol. I,A Method and its Application to Investment Activ ity,pp. 164,90¢;Vol. II,Business Cy cles in the United States of America 1919-1932,pp. 244,$1.25. New York: Columbia University Press,1939