NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

International Comparisons of R&D Expenditure: Does an R&D PPP Make a Difference?

Sean M. Dougherty, Robert Inklaar, Robert H. McGuckin, Bart van Ark

NBER Working Paper No. 12829
Issued in January 2007

---- Acknowledgements -----

This research is made possible by grant SRS/SES 00-99594 from the National Science Foundation (McGuckin et al., 2004), and was carried out while the authors were all residing at The Conference Board. The paper was originally prepared for the September 2003 NBER-CRIW Conference in honor of Zvi Griliches, and is forthcoming in Hard-to-Measure Goods and Services: Essays in Honor of Zvi Griliches, Ernst R. Berndt and Charles M. Hulten, Editors, from The University of Chicago Press, Spring 2007. Related work was presented at seminars of the National Academy of the Sciences in Washington, D.C., the OECD Science, Technology, and Industry Directorate in Paris, the NBER-CRIW Summer Institute in Cambridge, MA, The Conference Board's International Innovation Council in Cambridge, U.K., and the meeting of the Canberra II Group on the Measurement of Non-Financial Assets in Voorburg. We received particularly useful comments from Andrew Wyckoff and Dominique Guellec (OECD), Jeffrey Bernstein (Carleton University and NBER) and Ernst Berndt (MIT and NBER). We are deeply saddened that our co-author Robert H. McGuckin passed away in March 2006. His contribution to the economics profession will live on through his extensive published work. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.

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