CSM Media Research Enjoys Monopoly over the Market.

SHENZHEN, January 07, SinoCast -- As Nelson decided yesterday to put an end to its TV rating service in China, CSM Media Research will become the only player in the market.

Nelson says that such decision is a result of the fact that one of its partners WPP has bought a stake in CSM Media Research, placing Nelson in an awkward situation in this country.

WPP and Nelson once jointly set up a TV rating joint venture AGB Nielsen Media Research. They hold 50% of it, respectively. Nelson later took ownership of AGB Nielsen Media Research under an asset-swap deal signed with WPP in November 2008.

WPP purchased the world's third largest market research firm …