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Vertical Specialization and Nonstationarities in International Trade Series

  • Marcela Sabaté

    (Institute for International Integration Studies, Trinity College Dublin)

In this paper, we analyze the statistical properties of a large sample of trade openness series in the Second Era of Globalization (from 1948 to the recent crisis) and find a clear stationary pattern for developing countries versus a unit root pattern for developed countries. Most interestingly, we show how the progress of vertical specialization can rationalize this presence of unit roots in the ratio of export to GDP. We use scattered data of vertical specialization (defined as the imported input content of exports) for ten OECD countries to construct yearly export series free from the upwards bias introduced by vertically specialised trade in the official values. We find that when the statistical analysis is applied to the unbiased series of openness, they become trend stationary for nearly all the countries, corroborating the responsibility of vertical specialization in the presence of unit roots.

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Paper provided by IIIS in its series The Institute for International Integration Studies Discussion Paper Series with number iiisdp309.

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Length: ? pages
Date of creation: Nov 2009
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Handle: RePEc:iis:dispap:iiisdp309
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  1. Perron, Pierre, 1989. "The Great Crash, the Oil Price Shock, and the Unit Root Hypothesis," Econometrica, Econometric Society, vol. 57(6), pages 1361-1401, November.
  2. Findlay, Ronald & O'Rourke, Kevin Hjortshøj, 2002. "Commodity Market Integration 1500-2000," CEPR Discussion Papers 3125, C.E.P.R. Discussion Papers.
  3. Kyung-So Im & Junsoo Lee & Margie Tieslau, 2005. "Panel LM Unit-root Tests with Level Shifts," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 67(3), pages 393-419, 06.
  4. Emanuele Breda & Rita Cappariello & Roberta Zizza, 2007. "Vertical Specialisation in Europe: Evidence from the Import Content of Exports," Rivista di Politica Economica, SIPI Spa, vol. 97(3), pages 189, May-June.
  5. Dan Ben-David & David H. Papell, 1997. "Slowdowns and Meltdowns: Postwar Growth Evidence from 74 Countries," NBER Working Papers 6266, National Bureau of Economic Research, Inc.
  6. Venables, Anthony J., 1999. "Fragmentation and multinational production," European Economic Review, Elsevier, vol. 43(4-6), pages 935-945, April.
  7. Eric Zivot & Donald W.K. Andrews, 1990. "Further Evidence on the Great Crash, the Oil Price Shock, and the Unit Root Hypothesis," Cowles Foundation Discussion Papers 944, Cowles Foundation for Research in Economics, Yale University.
  8. Peter C.B. Phillips & Hyungsik R. Moon, 1999. "Linear Regression Limit Theory for Nonstationary Panel Data," Cowles Foundation Discussion Papers 1222, Cowles Foundation for Research in Economics, Yale University.
  9. Robin L. Lumsdaine & David H. Papell, 1997. "Multiple Trend Breaks And The Unit-Root Hypothesis," The Review of Economics and Statistics, MIT Press, vol. 79(2), pages 212-218, May.
  10. Avinash K. Dixit & Gene M. Grossman, 1982. "Trade and Protection with Multistage Production," Review of Economic Studies, Oxford University Press, vol. 49(4), pages 583-594.
  11. Andrews, Donald W K, 1991. "Heteroskedasticity and Autocorrelation Consistent Covariance Matrix Estimation," Econometrica, Econometric Society, vol. 59(3), pages 817-58, May.
  12. Perron, Pierre & Yabu, Tomoyoshi, 2009. "Testing for Shifts in Trend With an Integrated or Stationary Noise Component," Journal of Business & Economic Statistics, American Statistical Association, vol. 27(3), pages 369-396.
  13. Kei-Mu Yi, 2003. "Can Vertical Specialization Explain the Growth of World Trade?," Journal of Political Economy, University of Chicago Press, vol. 111(1), pages 52-102, February.
  14. Werner Antweiler & Daniel Trefler, 2000. "Increasing Returns and All That: A View From Trade," NBER Working Papers 7941, National Bureau of Economic Research, Inc.
  15. Kwiatkowski, D. & Phillips, P.C.B. & Schmidt, P., 1990. "Testing the Null Hypothesis of Stationarity Against the Alternative of Unit Root : How Sure are we that Economic Time Series have a Unit Root?," Papers 8905, Michigan State - Econometrics and Economic Theory.
  16. Chen, Hogan & Kondratowicz, Matthew & Yi, Kei-Mu, 2005. "Vertical specialization and three facts about U.S. international trade," The North American Journal of Economics and Finance, Elsevier, vol. 16(1), pages 35-59, March.
  17. Hummels, David & Ishii, Jun & Yi, Kei-Mu, 2001. "The nature and growth of vertical specialization in world trade," Journal of International Economics, Elsevier, vol. 54(1), pages 75-96, June.
  18. Hartmut Egger & Peter Egger, . "International Outsourcing and the Productivity of Low-skilled Labour in the EU," WIFO Working Papers 152, WIFO.
  19. Richard Baldwin & Frederic Robert-Nicoud, 2007. "Offshoring: General Equilibrium Effects on Wages, Production and Trade," NBER Working Papers 12991, National Bureau of Economic Research, Inc.
  20. Robert C. Feenstra, . "Integration Of Trade And Disintegration Of Production In The Global Economy," Department of Economics 98-06, California Davis - Department of Economics.
  21. Perron, P. & Bai, J., 1995. "Estimating and Testing Linear Models with Multiple Structural Changes," Cahiers de recherche 9552, Centre interuniversitaire de recherche en économie quantitative, CIREQ.
  22. Kaddour Hadri, 2000. "Testing for stationarity in heterogeneous panel data," Econometrics Journal, Royal Economic Society, vol. 3(2), pages 148-161.
  23. Junsoo Lee & Mark C. Strazicich, 2003. "Minimum Lagrange Multiplier Unit Root Test with Two Structural Breaks," The Review of Economics and Statistics, MIT Press, vol. 85(4), pages 1082-1089, November.
  24. Vogelsang, Timothy J & Perron, Pierre, 1998. "Additional Tests for a Unit Root Allowing for a Break in the Trend Function at an Unknown Time," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 39(4), pages 1073-1100, November.
  25. Perron, P., 1990. "Further Evidence On Breaking Trend Functions In Macroeconomics Variables," Papers 350, Princeton, Department of Economics - Econometric Research Program.
  26. Batra, Raveendra N & Casas, Francisco R, 1973. "Intermediate Products and the Pure Theory of International Trade: A Neo-Heckscher-Ohlin Framework," American Economic Review, American Economic Association, vol. 63(3), pages 297-311, June.
  27. Arndt, Sven W., 1997. "Globalization and the open economy," The North American Journal of Economics and Finance, Elsevier, vol. 8(1), pages 71-79.
  28. Horgos, Daniel, 2009. "Labor market effects of international outsourcing: How measurement matters," International Review of Economics & Finance, Elsevier, vol. 18(4), pages 611-623, October.
  29. Stock, James H & Watson, Mark W, 1988. "Variable Trends in Economic Time Series," Journal of Economic Perspectives, American Economic Association, vol. 2(3), pages 147-74, Summer.
  30. Yehua Dennis Wei & Xinyue Ye, 2004. "Regional Inequality in China: A Case Study of Zhejiang Province," Tijdschrift voor Economische en Sociale Geografie, Royal Dutch Geographical Society KNAG, vol. 95(1), pages 44-60, 02.
  31. David L. Hummels & Dana Rapoport & Kei-Mu Yi, 1998. "Vertical specialization and the changing nature of world trade," Economic Policy Review, Federal Reserve Bank of New York, issue Jun, pages 79-99.
  32. Hung-Yi Chen & Yang-Ming Chang, 2006. "Trade Verticality and Structural Change in Industries:The Cases of Taiwan and South Korea," Open Economies Review, Springer, vol. 17(3), pages 321-340, July.
  33. Levin, Andrew & Lin, Chien-Fu & James Chu, Chia-Shang, 2002. "Unit root tests in panel data: asymptotic and finite-sample properties," Journal of Econometrics, Elsevier, vol. 108(1), pages 1-24, May.
  34. Dickey, David A & Fuller, Wayne A, 1981. "Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root," Econometrica, Econometric Society, vol. 49(4), pages 1057-72, June.
  35. Jones, Ronald & Kierzkowski, Henryk & Lurong, Chen, 2005. "What does evidence tell us about fragmentation and outsourcing?," International Review of Economics & Finance, Elsevier, vol. 14(3), pages 305-316.
  36. George Kapetanios, 2002. "Unit Root Testing against the Alternative Hypothesis of up to m Structural Breaks," Working Papers 469, Queen Mary University of London, School of Economics and Finance.
  37. João Amador & Sónia Cabral, 2008. "Vertical Specialization in Portuguese International Trade," Economic Bulletin and Financial Stability Report Articles, Banco de Portugal, Economics and Research Department.
  38. Ben-David, Dan & Papell, David H., 1995. "The great wars, the great crash, and steady state growth: Some new evidence about an old stylized fact," Journal of Monetary Economics, Elsevier, vol. 36(3), pages 453-475, December.
  39. David Hummels, 2007. "Transportation Costs and International Trade in the Second Era of Globalization," Journal of Economic Perspectives, American Economic Association, vol. 21(3), pages 131-154, Summer.
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