Got a Business Idea? Billionaire Stephen A. Schwarzman Has 3 Questions to Ask Yourself Before Launching It. Posted byStephen A. Schwarzman September 30, 2019 Leave a comment on Got a Business Idea? Billionaire Stephen A. Schwarzman Has 3 Questions to Ask Yourself Before Launching It. If you’re going to start a business, it must pass three basic tests, says the CEO of global private equity firm The Blackstone Group.