UCLA Anderson School’s Noah J. Goldstein writes in the Harvard Business Review about Harnessing Social Pressure: just giving people access to data alters their behavior (e.g., letting hotel guests know others who had stayed in the same room before them had reused towels resulted in more guests reusing towels). But I love the idea of the “magnetic middle”, in which such data can not only influence people to do better, but to “backslide” to where others are if they were already ahead of the curve...