Social News: Facebook Inc (FB)’s Mission, LinkedIn Corp (LNKD)’s Popularity & Yelp Inc (YELP)

Facebook Makes Us Sadder And Less Satisfied, Study Finds (WWNO)
Facebook’s mission “to make the world more open and connected” is a familiar refrain among company leaders. But the latest research shows connecting 1.1 billion users around the world may come at a psychological cost. A new University of Michigan study on college-aged adults finds that the more they used Facebook, the worse they felt. The study, published in the journal PLOS One, found Facebook use led to declines in moment-to-moment happiness and overall life satisfaction.

LinkedIn Corp. Receives Sell Rating from TheStreet (LNKD) (WatchListNews)
TheStreet reissued their sell rating on shares of LinkedIn Corp (NYSE:LNKD) in a research report sent to investors on Friday morning, Analyst Ratings.Net reports. “LinkedIn (LNKD) has been reiterated by TheStreet Ratings as a sell with a ratings score of D+. Among the areas we feel are negative, one of the most important has been premium valuation based on our review of its current price compared to such things as earnings and book value.,” the firm’s analyst wrote.

Yelp issues consumer alert for businesses paying for reviews (10News)
Review website Yelp Inc (NYSE:YELP) is warning people about businesses it says tries to pay people for five-star reviews. Elijah Rasmussen checked out a crepe place on the popular online review site after getting burned not using it. “There have been a couple places I wish I would have looked up before going,” said Rasmussen. Another San Diego diner, Banu Pawleke, told Team 10 she uses Yelp Inc (NYSE:YELP) every day “to check out the pictures and the food.”