Unobserved time effects confound the identification of climate change impacts.
editorial · Level V
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- Record sourced from PubMed, PMID 22783021.
- Also identified by DOI 10.1073/pnas.1202049109 and PMC identifier 3409766.
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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.
Medical subject headings
- Causality
- Climate Change
- Crops, Agricultural
- Emigration and Immigration