Changes are in store for newly merged Google and DoubleClick, following the March 11 approval of the merger. Google has announced that it will lay off 25% of DoubleClick's 1,200 US-based employees. In addition, the online giant has announced that it will split DoubleClick Performics into two separately run business units, one covering affiliate marketing, and the other search marketing. Google plans to integrate the affiliate marketing into its existing business and sell off the search marketing group.