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Economics and Climate Change: Integrated Assessment in a Multi-Region World


  • Hassler, John
  • Krusell, Per


This paper develops a model that integrates the climate and the global economy---an integrated assessment model---with which different policy scenarios can be analyzed and compared. The model is a dynamic stochastic general-equilibrium setup with a continuum of regions. Thus, it is a full stochastic general-equilibrium version of RICE, Nordhaus's pioneering multi-region integrated assessment model. Like RICE, our model features traded fossil fuel but otherwise has no markets across regions---there is no insurance nor any intertemporal trade across them. The extreme form of market incompleteness is not fully realistic but arguably not a decent approximation of reality. Its major advantage is that, along with a set of reasonable assumptions on preferences, technology, and nature, it allows a closed-form model solution. We use the model to assess the welfare consequences of carbon taxes that differ across as well as within oil-consuming and -producing regions. We show that, surprisingly, only taxes on oil producers can improve the climate: taxes on oil consumers have no effect at all. The calibrated model suggests large differences in views on climate policy across regions.

Suggested Citation

  • Hassler, John & Krusell, Per, 2012. "Economics and Climate Change: Integrated Assessment in a Multi-Region World," CEPR Discussion Papers 8771, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:8771

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    References listed on IDEAS

    1. John Hassler & Per Krusell & Conny Olovsson, 2010. "Oil Monopoly and the Climate," American Economic Review, American Economic Association, vol. 100(2), pages 460-464, May.
    2. Manne, Alan & Mendelsohn, Robert & Richels, Richard, 1995. "MERGE : A model for evaluating regional and global effects of GHG reduction policies," Energy Policy, Elsevier, vol. 23(1), pages 17-34, January.
    3. John Hassler & Per Krusell & Conny Olovsson, 2012. "Energy-Saving Technical Change," NBER Working Papers 18456, National Bureau of Economic Research, Inc.
    4. Mikhail Golosov & John Hassler & Per Krusell & Aleh Tsyvinski, 2014. "Optimal Taxes on Fossil Fuel in General Equilibrium," Econometrica, Econometric Society, vol. 82(1), pages 41-88, January.
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    More about this item


    climate; dynamic; integrated assessment; regional; stochastic;

    JEL classification:

    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • O44 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Environment and Growth
    • Q0 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General

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