Unobserved time effects confound the identification of climate change impacts

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Abstract

A recent study by Feng et al. [Feng S, Krueger A, Oppenheimer M (2010) Proc Natl Acad Sci USA 107:14257-14262] in PNAS reported statistical evidence of a weather-driven causal effect of crop yields on human migration from Mexico to the United States. We show that this conclusion is based on a different statistical model than the one stated in the paper. When we correct for this mistake, there is no evidence of a causal link.

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APA

Auffhammer, M., & Vincent, J. R. (2012). Unobserved time effects confound the identification of climate change impacts. Proceedings of the National Academy of Sciences of the United States of America, 109(30), 11973–11974. https://doi.org/10.1073/pnas.1202049109

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