A Marketplace in the Brain?

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Science  15 Oct 2004:
Vol. 306, Issue 5695, pp. 421-423
DOI: 10.1126/science.1104884

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What would you do if faced with the choice of a smaller reward that you could have today versus a larger reward that you would receive after several weeks' delay? Such questions are explored by Ainslie and Monterosso in their Perspective, which discusses a recent study that uses functional magnetic resonance imaging to measure the brain activity of student volunteers as they are faced with immediate versus delayed monetary rewards ( McClure et al.).