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The dark side of online deals, why cockiness is advantageous and more in this week's news

Have I got a deal for you
Daily deal sites such as Groupon and LivingSocial boost sales and revenue for participating merchants, but the reputations of the businesses may take a hit. Reviews on Yelp that refer to daily deals are more negative, lowering merchant ratings for months after a daily deal offer, an analysis of more than 56,000 Groupon reviews reveals.