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Projecting the World Economy to 2050: Agriculture in the Economy-wide GTAP Model

  • Ernesto Valenzuela

    ()

    (Centre for International Economic Studies, School of Economics, University of Adelaide)

  • Kym Anderson

    ()

    (Centre for International Economic Studies, School of Economics, University of Adelaide)

Recent analyses of the possible adverse effects of climate change and policy responses on agriculture and mining have raised food and energy security concerns in both rich and poorer countries. Analysing possible effects of ways of dealing with those concerns requires first projecting the world economy forward to 2050 and beyond. This paper provides as background a set of projections to 2050, drawing on the global economy-wide model known as GTAP. The projection is calibrated to ensure the real prices of primary products remain broadly unchanged from their levels in the model's base year of 2004. Alternative scenarios could have been calibrated to show (a) rising real prices for both food and energy raw materials (consistent with forecasts of several international agencies), by assuming some slowdown in productivity growth in primary sectors, or (b) declining real prices for agricultural and mining products (consistent with the experience of most of the 20th century), by assuming somewhat faster productivity growth in primary sectors. The set of projections shown for 2030 and 2050 is thus an intermediate set. The key impacts on international prices, agricultural self-sufficiency, sectoral shares of national economies and national shares of the global economy are highlighted. The paper concludes with implications for R&D spending and research policy.

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File URL: http://www.adelaide.edu.au/cies/publications/present/CIES_DP1101.pdf
File Function: First version, 2011
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Paper provided by University of Adelaide, Centre for International Economic Studies in its series Centre for International Economic Studies Working Papers with number 2011-01.

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Length: 28 pages
Date of creation: Mar 2011
Date of revision:
Handle: RePEc:adl:cieswp:2011-01
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  1. Hertel, Thomas & Hummels, David & Ivanic, Maros & Keeney, Roman, 2007. "How confident can we be of CGE-based assessments of Free Trade Agreements?," Economic Modelling, Elsevier, vol. 24(4), pages 611-635, July.
  2. Anderson, Kym & Kurzweil, Marianne & Martin, Will & Sandri, Damiano & Valenzuela, Ernesto, 2008. "Measuring distortions to agricultural incentives, revisited," Policy Research Working Paper Series 4612, The World Bank.
  3. Kym Anderson, 2009. "Distorted Agricultural Incentives and Economic Development: Asia's Experience," The World Economy, Wiley Blackwell, vol. 32(3), pages 351-384, 03.
  4. Martin, Will & Mitra, Devashish, 2001. "Productivity Growth and Convergence in Agriculture versus Manufacturing," Economic Development and Cultural Change, University of Chicago Press, vol. 49(2), pages 403-22, January.
  5. Beddow, Jason M. & Pardey, Philip G. & Alston, Julian M., 2009. "The Shifting Global Patterns of Agricultural Productivity," Choices, Agricultural and Applied Economics Association, vol. 24(4).
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