When researching investment opportunities, investors need to review revenue numbers, market size, founder experience and other criteria. But what about accelerators? Some startups list their membership in a startup accelerator as a badge of honor. But what is an accelerator? And should investors take them into account when vetting startups? In today’s Startup Insider, Vin Narayanan and Andy Gordon answer these questions and more (in a crisp 13 minutes!).   Thanks for watching!…