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Letter: For the record

Published 12 February 2014

• We briefly lost our bearings in our look at Braess’s paradox (18 January, p 30). Physicist Adilson Motter is at Northwestern University in Evanston, Illinois, not Northeastern University.

Issue no. 2956 published 15 February 2014

Â鶹´«Ã½ issue 2956 cover

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