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The impact of climate on the law of one price: A test using North American food prices from the 1920s

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  • Bruce Cater
  • Byron Lew

Abstract

Using grocery price data for over 100 urban locations across the US and Canada from the 1920s, we show that deviations from the law of one price (LOP) were strongly related to climate differences. The effect of climate has a large impact on the elasticity of deviations from LOP with respect to distance, while having no impact on the border effect. We then test a counterfactual to show that the relationship between deviations from LOP and temperature does not hold when historical temperature data are replaced with contemporary. This is evidence that climate impacts production. L’impact du climat sur la loi du prix unique: un test utilisant les prix de la nourriture en Amérique du Nord dans les années 1920.À l’aide de données sur les prix de la nourriture dans les épiceries dans plus d’une centaine de villes aux États‐Unis et au Canada dans les années 1920, on montre que les déviations par rapport à la loi du prix unique (LPU) sont fortement reliées aux différences dans le climat. L’effet du climat a un grand impact sur l’élasticité des déviations par rapport à la LPU par rapport à la distance mais aucun impact sur l’effet de frontière. On utilise alors un test contrefactuel pour montrer que la relation entre les déviations par rapport à la LPU et la température ne tient pas quand on remplace les températures historiques par les températures contemporaines. Ceci montre que le climat a un impact sur la production.

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  • Bruce Cater & Byron Lew, 2018. "The impact of climate on the law of one price: A test using North American food prices from the 1920s," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 51(4), pages 1191-1220, November.
  • Handle: RePEc:wly:canjec:v:51:y:2018:i:4:p:1191-1220
    DOI: 10.1111/caje.12357
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    1. Crucini, Mario J. & Yilmazkuday, Hakan, 2014. "Understanding long-run price dispersion," Journal of Monetary Economics, Elsevier, vol. 66(C), pages 226-240.

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