Unobserved time effects confound the identification of climate change impacts

Type

Journal Article

Author(s)

Auffhammer, M.
Vincent, J. R.

Title

Unobserved time effects confound the identification of climate change impacts

Date

2012

Journal

Proceedings of the National Academy of Sciences (PNAS)

Vol (No), pp

109(30), 11973-11974

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.

Citation

Auffhammer, M. & Vincent, J. R. (2012). Unobserved time effects confound the identification of climate change impacts. Proceedings of the National Academy of Sciences (PNAS), 109(30), 11973-11974. DOI : 10.1073/pnas.1202049109.

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