DOW JONES NEWSWIRES 
 

An e-commerce research firm said while the search partnership between Microsoft Corp. (MSFT) and Yahoo Inc. (YHOO) can help the companies become more competitive in the search marketplace, chipping away at Google Inc.'s (GOOG) customer loyalty will be difficult.

According to comScore Inc. (SCOR), Yahoo and Microsoft have an opportunity to make marketshare headway, given that nearly three-quarters of all searchers conduct at least one search on all three engines every month. Those light searchers should be targeted by the two companies, which is seen as an easier task than converting new users.

Still, comScore said Google has the highest loyalty rate of the three sites.

"The challenge facing a Microsoft-Yahoo combined search offering is that choice of search engines is often a subconscious decision on the part of the user," said Gord Hotchkiss, president and chief executive of Enquiro Search Solutions. "For Microsoft-Yahoo to disrupt the Google habit, they have to offer a compelling enough reason to do the cognitive heavy lifting required to break a subconscious habit."

Last month, Yahoo and Microsoft agreed to a 10-year search partnership agreement, in a game-changing deal as the players look to take on market leader Google. But analysts and advertising executives have said Google will have plenty of time to refine its technology and craft a counter strategy if necessary because the complex deal will take two years to implement.

There are added concerns with whether a deal that consolidates the search market from three main players to two would be opposed by regulators.

Google had a 65% share of searches in the U.S. core search market in June, according to comScore, while Yahoo and Microsoft had a combined 28%.

-By John Kell, Dow Jones Newswires; 212-416-2480; john.kell@dowjones.com