Running a small business isn’t easy. Succeeding is even harder. And it’s more difficult when regulations hold you back.With more than 45% of economy driven by it, small businesses are engines of economic prosperity. But that engine seems to have stalled.In 2013, 400,000 companies were started, compared to 450,000 that were started in 1980. Population grew 40%, while start-ups fell 11%.A report for the U.S. Chamber of Commerce Foundation, “The Regulatory Impact on Small Business: Complex. Cumbersome. Costly,” looks at how regulations are throwing sand in the gears of that engine.