Video: Groupon, LivingSocial Provide 21st Century Coupons

Online sites like Groupon and LivingSocial are pioneering the hottest thing in retail marketing. You sign up, and every day you get a coupon for half off or more at a local business: everything from restaurants to spas to painting lessons. Rebecca Jarvis spoke with the CEO's of Groupon and LivingSocial to look into the future of this online phenomenon.

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