Wall Street Journal (Source) found are founded by immigrants. are founded by immigrants. $1 billion and up positive externalities NY Times more than half of the billion dollar new ventures more than half of the billion dollar new ventures writes Yoree Koh more than half of the billion dollar new ventures one study found that 51% of all billion-dollar start-ups 2016 study Wall Street Journal more than half of the billion dollar new ventures positive externalities Wall Street Journal study Wall Street Journal Wall Street Journal study Mark Zuckerberg and Bill Gates 《华尔街日报》 Wall Street Journal article about the study Wall Street Journal