22  See Carol Corrado, Paul Lengermann, and Lawrence Slifman (2003), "The Contribution of Multinational Corporations to U.S. Productivity Growth," paper presented at the OECD Workshop on the Impact of Multinational Enterprises on Productivity Growth, Paris, November 5. 23  See Robert Z. Lawrence (1996), Single World, Divided Nations?
International Trade and OECD Labor Markets (Washington: Brookings Institution), and Per Krusell, Lee E. Ohanian, Jose-Victor Rios-Rull, and Giovanni L. Violante (2000), "Capital-Skill Complementarity and Inequality: A Macroeconomic Analysis," Econometrica, vol. 68 (September), pp. 1029-53. 24  See Edward E. Leamer and Peter K. Schott (2005), "The Rich (and Poor) Keep Getting Richer," Harvard Business Review, vol. 83 (April), p. 20.