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Analysing Convergence with a Multi-Country Computable General Equilibrium Model: PPP versus Mer


  • Peter B. Dixon
  • Maureen T. Rimmer


In studies of the greenhouse gas implications of convergence by developing countries to the per-capita GNPs of developed countries, considerable discussion has centred on whether purchasing power parity (PPP) or market exchange rates (MER) should be used in measuring per-capita GNPs. We suggest that technology gaps between developing and developed countries should be the starting point for convergence analysis rather than per-capita GNP gaps. We estimate two sets of initial technology gaps, using PPP and MER price assumptions combined with input-output data. In simulating the effects of closing technology gaps (convergence) using a dynamic, multi-country CGE model, we find: the MER/PPP distinction matters. MER-based estimates of initial technology gaps lead to higher estimates of convergence-induced growth in greenhouse-gas-emitting industries in developing countries than do PPP-based estimates. the industry detail in CGE models is valuable. Our simulations show a wide range of convergence-induced changes in output across industries.

Suggested Citation

  • Peter B. Dixon & Maureen T. Rimmer, 2005. "Analysing Convergence with a Multi-Country Computable General Equilibrium Model: PPP versus Mer," Energy & Environment, , vol. 16(6), pages 901-921, November.
  • Handle: RePEc:sae:engenv:v:16:y:2005:i:6:p:901-921

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    Cited by:

    1. Tol, Richard S.J., 2007. "Carbon dioxide emission scenarios for the USA," Energy Policy, Elsevier, vol. 35(11), pages 5310-5326, November.
    2. Pant, Hom M. & Fisher, Brian S., 2007. "Alternative measures of output in global economic-environmental models: Purchasing power parity or market exchange rates? -- Comment," Energy Economics, Elsevier, vol. 29(3), pages 375-389, May.


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