December 28, 2012 4:53 PM

Twitter Saps Productivity, and Facebook Makes You Fat (New York)

Ever since the invention of the wheel in Mesopotamia around 3500 B.C., technological innovation has been improving our lives. Because new devices and processes help us produce more (output) with less (labor input), prices fall, real wages rise and we are all better off. If there is a free lunch in this world, it's productivity growth.

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