Research Article
Flynn effect and its reversal are both environmentally caused
View ORCID ProfileBernt Bratsberg and View ORCID ProfileOle Rogeberg
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PNAS June 26, 2018 115 (26) 6674-6678; first published June 11, 2018; https://doi.org/10.1073/pnas.1718793115
Bernt Bratsberg
aRagnar Frisch Centre for Economic Research, 0349 Oslo, Norway
Ole Rogeberg
aRagnar Frisch Centre for Economic Research, 0349 Oslo, Norway
Edited by Richard E. Nisbett, University of Michigan, Ann Arbor, MI, and approved May 14, 2018 (received for review October 27, 2017)

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vol. 115 no. 26 6674-6678
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- Published in issue June 26, 2018.
- Published first June 11, 2018.
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↵1B.B. and O.R. contributed equally to this work.
- ↵2To whom correspondence should be addressed. Email: ole.rogeberg{at}frisch.uio.no.
Author contributions: B.B. and O.R. designed research, performed research, analyzed data, and wrote the paper.
The authors declare no conflict of interest.
This article is a PNAS Direct Submission.
This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1718793115/-/DCSupplemental.
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Flynn effect and its reversal are both environmentally caused
Bernt Bratsberg, Ole Rogeberg
Proceedings of the National Academy of Sciences Jun 2018, 115 (26) 6674-6678; DOI: 10.1073/pnas.1718793115
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