Unobserved time effects confound the identification of climate change impacts

被引：18

作者：

Auffhammer, Maximilian ^{[1
,2
]}

Vincent, Jeffrey R. ^{[3
]}

机构：

[1] Univ Calif Berkeley, Dept Agr & Resource Econ, Berkeley, CA 94720 USA

[2] Natl Bur Econ Res, Cambridge, MA 02138 USA

[3] Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2012年 / 109卷 / 30期

关键词：

agricultural productivity; environmental migrants; global warming; instrumental variables approach;

D O I：

10.1073/pnas.1202049109

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：11973 / 11974

页数：2