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A Peek Under the Hood at Uber

Once upon a New Year's Eve, after StumbleUpon founder and CEO Garrett Camp dropped $800 on three cab rides, he decided there had to be a better way to get a ride when you really needed one.

He started Uber, a marketplace that connects you via an iPhone or android app with your own private driver. That may sound simple enough but take a peek under the hood, and it turns out be one gigantic math problem, says Ryan Graves, Uber's VP of Operations.

"A lot goes into matching drivers with riders," he told me, "and we measure everything. After someone opens the app, how often do they refresh the screen? How fast does the driver respond? How accurate is his ETA?"

Using GPS, Uber's system identifies the closest on-duty driver to where the rider's location. The driver has 15 seconds to respond. "Drivers love it," says Graves, "because it means less time with an empty backseat. When they're empty they are treating the Uber app like it's hot."

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