66% More People Take the Stairs in This Fun Study

In this viral video, the staircase in Stockholm’s Odenplan subway station was made to resemble giant piano keys, each producing real sound. The goal was to encourage people to take the stairs rather than ride the escalator. The video claims that 66% more people than normal climbed the stairs instead of taking the escalator.  http://freakonomics.blogs.nytimes.com/2009/10/13/who-will-climb-the-piano-stairs/

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