This volume forms part of a ten volume set on the origins of macroeconomics. The emergence of macroeconomics was probably the single most important development in economics in the twentieth century. The set draws on a broad, international range of sources, and encompasses works by lesser known thinkers who made significant contributions to the field, providing the definitive collection of materials on the origins of the discipline. <p><strong>Volume 6 </strong></p><p> <strong>The Beginnings of Open-Economy Macroeconomics</strong></p><p> 85. <em>Wesley C. Mitchell</em>, 'The International Pattern of Business Cycles,' <em>Revue de l'Institut International de Statistique</em>, 28, 1935, pp. 397-403</p><p> 86. <em>Lloyd A. Metzler</em>, 'Underemployment Equilibrium in International Trade,' <em>Econometrica</em>, 10, April 1942, pp. 97-112</p><p> 87. <em>J. M. Keynes</em>, 'The Balance of Payments of the United States,' <em>Economic Journal</em>, 56, June 1946, pp. 172-187</p><p> 88. <em>Charles P. Kindleberger</em>, 'The Foreign-Trade Multiplier, the Propensity to Import and Balance-of-Payments Equilibrium,' <em>American Economic Review</em>, 39, March 1949, pp. 491-494</p><p> 89. <em>Fritz Machlup</em>, International Trade and the National Income Multiplier, Philadelphia, Blakiston, 1943 </p>