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In a New York Times opinion piece, Dartmouth’s Bruce Sacerdote writes that grouping students by ability, known as “tracking,” can have a positive impact on the class.

In a study of students at the Air Force Academy, he and two fellow economists found that “students benefit from their peers, but that these peer effects disappear if the group is comprised of the highest ability and lowest ability cadets,” writes Sacerdote, the Richard S. Braddock 1963 Professor in Economics.

Read the full opinion piece, published 6/3/14 by The New York Times.