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Information Aggregation in a Prediction Market for Climate Outcomes

Author

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  • Elmira Aliakbari

    (Fraser Institute, Vancouver BC, Canada)

  • Ross McKitrick

    () (Department of Economics, University of Guelph, Guelph ON Canada)

Abstract

Two forms of uncertainty in climate policy are the wide range of estimated marginal costs and uncertainty over credibility of rival information sources. We show how a recently-proposed solution to the first problem also addresses the second. The policy is an emissions tax tied to average temperatures, coupled with permits that exempt the emitter from paying the tax in a future year. It has been shown that the resulting tax path will be correlated with future marginal damages. It has been conjectured that the permit prices will yield unbiased forecasts of the climate, which, if true, would address the second uncertainty. We confirm the conjecture by showing a trading mechanism that converges on unbiased forecasts if traders are risk-neutral. Risk aversion slows down but does not prevent convergence. We also show that the forecasts are more likely to be sufficient statistics the stronger the consensus on climate science.

Suggested Citation

  • Elmira Aliakbari & Ross McKitrick, 2017. "Information Aggregation in a Prediction Market for Climate Outcomes," Working Papers 1702, University of Guelph, Department of Economics and Finance.
    • Handle: RePEc:gue:guelph:2017-02
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    File URL: http://www.uoguelph.ca/economics/repec/workingpapers/2017/2017-02.pdf
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    References listed on IDEAS

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    1. Nordhaus, William D, 1991. "To Slow or Not to Slow: The Economics of the Greenhouse Effect," Economic Journal, Royal Economic Society, vol. 101(407), pages 920-937, July.
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    3. Tol, Richard S.J., 2014. "Quantifying the consensus on anthropogenic global warming in the literature: A re-analysis," Energy Policy, Elsevier, vol. 73(C), pages 701-705.
    4. H. Henry Cao., 1995. "Imperfect Competition in Securities Markets with Diversely Informed Traders," Research Program in Finance Working Papers RPF-258, University of California at Berkeley.
    5. McKitrick, Ross, 2011. "A simple state-contingent pricing rule for complex intertemporal externalities," Energy Economics, Elsevier, vol. 33(1), pages 111-120, January.
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    8. Nordhaus, William D., 1993. "Rolling the 'DICE': an optimal transition path for controlling greenhouse gases," Resource and Energy Economics, Elsevier, vol. 15(1), pages 27-50, March.
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    10. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-1335, November.
    11. Berg, Joyce E. & Nelson, Forrest D. & Rietz, Thomas A., 2008. "Prediction market accuracy in the long run," International Journal of Forecasting, Elsevier, vol. 24(2), pages 285-300.
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    More about this item

    Keywords

    Climate change; uncertainty; carbon tax; tradable permits; state-contingent pricing; prediction markets;

    JEL classification:

    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing

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