What you eat is how many you are

Ivar Ekeland
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Ivar Ekeland: Ivar Ekeland is at the University of Paris-Dauphine

Nature, 1997, vol. 389, issue 6646, 16-17

Abstract: How do people make decisions? A standard answer (not the only one) runs as follows: every individual first ranks all alternatives open to them, and then chooses the top of the list. This model had not been validated by econometric studies, but now a simple realization has changed that situation: two people don't act the same way as one. Indeed, the buying patterns of couples conform toentirely different sets of equations.

Date: 1997
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DOI: 10.1038/37867

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