Excerpt from Steve Ballmer's letter to Jerry Yang:
"We regard with particular concern your apparent planning to respond to a "hostile" bid by pursuing a new arrangement that would involve or lead to the outsourcing to Google of key paid Internet search terms offered by Yahoo today. In our view, such an arrangement with the dominant search provider would make an acquisition of Yahoo undesirable to us for a number of reasons:
-- First, it would fundamentally undermine Yahoo's own strategy and long-term viability by encouraging advertisers to use Google as opposed to your Panama paid search system. This would also fragment your search advertising and display advertising strategies and the ecosystem surrounding them. This would undermine the reliance on your display advertising business to fuel future growth.
-- Given this, it would impair Yahoo's ability to retain the talented engineers working on advertising systems that are important to our interest in a combination of our companies.
-- In addition, it would raise a host of regulatory and legal problems that no acquirer, including Microsoft, would want to inherit. Among other things, this would consolidate market share with the already-dominant paid search provider in a manner that would reduce competition and choice in the marketplace."