There is a good chance most Americans have heard of a company called Nielsen (NLSN). Nielsen, for decades now, has had a virtual monopoly on providing television ratings to interested parties. These interested parties are both those buying and selling the $140B worth of advertising annually in the US, the majority of which flows through the television medium.
There is good chance most have never heard of a company called Rentrak (RENT) who is attempting to break the monopoly that Nielsen holds over the ratings market. Ironically, Nielsen was even sued on grounds that it held a monopoly over this market, and the court agreed that a monopoly did exist but dismissed...
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