For Silicon Valley, and for the U.S., this is the wrong kind of change. To some degree, these responses reflected the moribund U.S. economy and the rough job prospects facing students. With U.S. unemployment at 10%, who cares if we lose the next generation of geeks? There won’t be jobs for them for years, anyway, until the U.S. job market recovers. And sure, I know the xenophobes are going to cheer my findings. They believe that foreign workers take American jobs away.

But a growing body of evidence indicates that skilled foreign immigrants create jobs for Americans and boost our national competitiveness. More than 52% of Silicon Valley’s startups during the recent tech boom were started by foreign-born entrepreneurs. Foreign-national researchers have contributed to more than 25% of our global patents, developed some of our break-through technologies, and they helped make Silicon Valley the world’s leading tech center. Foreign-born workers comprise almost a quarter of all the U.S. science and engineering workforce and 47% of science and engineering workers who have PhDs. It is very possible that some of the smart Indians who sat in the room with me holding their hand up on Columbus Day will start the next Google or Apple. Many of them will build companies which employ thousands. But the jobs will be in Hyderbad or Pune, not Silicon Valley.