The credibility of university research is on the line as corporations step up their funding. One issue is academic freedom. Corporations that fund university research often demand the right to control what scientists can say publicly about their work. "They're like bullies in a sandbox who take away their toys when you don't agree with them," says David Kahn, a researcher at the University of California-San Francisco who was sued for $10 million by the company that sponsored his study, after he published a report that the AIDS drug he was testing was ineffective.