The Week: Media news - Search tie-up faces probe

The US Justice Department has announced that it is to launch an in-depth investigation into the proposed new search engine partnership between Microsoft and Yahoo!. Under the deal, Yahoo! will use Microsoft's Bing search engine on its websites and will sell ads that appear next to the search results, with the companies splitting the revenue. However, an investigation is required to determine whether the deal will provide more or less of an incentive for the companies to compete aggressively in the search market.