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Commodity Prices and Volatility in Response to Anticipated Climate Change

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  • Tran, A. Nam
  • Welch, Jarrod R.
  • Lobell, David
  • Roberts, Michael J.
  • Schlenker, Wolfram

Abstract

Mounting evidence indicates climate change will adversely influence agricultural crop yields and cause greater year-to-year variability. This paper considers how a rational, forward-looking and competitive commodity market would account for these anticipated changes and thereby influence time path of storage, prices, price volatility, and social welfare. We forecast 1600 hypothetical yield paths from 2000 to 2080 using estimates from a recent global statistical analysis of weather and crop yields combined with projections from 16 climate models. We then extend the dynamic competitive storage model to account for land response to price and anticipated yield shift. We simulate 1600 stochastic-equilibrium price paths under climate change relative to a baseline of stable prices using our hypothetical yield paths together with estimated demand and supply elasticities and storage cost from the literature. Our results indicate that, under the impact of climate change, world crop price level will increase twofold and world crop price volatility will increase fivefold between 2000 and 2080. Welfare analysis suggests that by 2020, the world would have welfare loss equivalent to food for 180 to 200 million people annually.

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  • Tran, A. Nam & Welch, Jarrod R. & Lobell, David & Roberts, Michael J. & Schlenker, Wolfram, 2012. "Commodity Prices and Volatility in Response to Anticipated Climate Change," 2012 Annual Meeting, August 12-14, 2012, Seattle, Washington 124827, Agricultural and Applied Economics Association.
    • Handle: RePEc:ags:aaea12:124827
    DOI: 10.22004/ag.econ.124827
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    1. Khalfaoui, Rabeh & Goodell, John W. & Mefteh-Wali, Salma & Chishti, Muhammad Zubair & Gozgor, Giray, 2024. "Impact of climate risk shocks on global food and agricultural markets: A multiscale and tail connectedness analysis," International Review of Financial Analysis, Elsevier, vol. 93(C).
    2. Roshini Brizmohun, 2019. "Impact of climate change on food security of small islands: The case of Mauritius," Natural Resources Forum, Blackwell Publishing, vol. 43(3), pages 154-163, August.
    3. Sukati, Mphumuzi, 2013. "Measuring Maize Price Volatility in Swaziland using ARCH/GARCH approach," MPRA Paper 51840, University Library of Munich, Germany.
    4. Buschmann, Christoph & Lotze-Campen, Hermann & Rolinski, Susanne & Biewald, Anne, 2015. "A model-based economic assessment of future climate variability impacts on global agricultural markets," 2015 Conference, August 9-14, 2015, Milan, Italy 211377, International Association of Agricultural Economists.
    5. Anna Josephson, 2021. "Intra-Household Management of Joint Resources: Evidence from Malawi," Papers 2112.12766, arXiv.org, revised Apr 2022.

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    Keywords

    Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy;
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