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Now Playing: 5-22-13 Marketplace

How much data are you leaking? Lots of business are selling your data to others to help them all track you. How can you opt out? We find out. In the business of sports, golf and basketball and making rules changes, like raising the hoop to make it harder to dunk. What's the economic cost? Also, we take a trip to the tax-shelter island otherwise known as Manhattan to tell you about how some of Apple's untaxable billions aren't actually overseas.