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Study Secretly Tracked Cellphone Users

from the Seattle Times
 
Researchers secretly tracked the locations of 100,000 people outside the United States through their cellphone use and concluded that most people rarely stray more than a few miles from home.
 
The first-of-its-kind study by Northeastern University raises privacy and ethical questions for its monitoring methods, which would be illegal in the United States.
 
It also yielded somewhat surprising results that reveal how little people move around in their daily lives. Nearly three-quarters of those studied mainly stayed within a 20-mile-wide circle for half a year.

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