The formula behind San Francisco’s startup success Ifeadi C. 00:06 TechCrunch, Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsMLB exploring using tech to help call balls and strikesWhich types of startups are most often profitable?Y Combinator president Sam Altman is stepping down amid a series of changes at the accelerator‘Fresh Prince’ actor dismisses his Fortnite dance lawsuitTufts expelled a student for grade hacking. She claims innocenceVenture investors and startup execs say they don’t need Elizabeth Warren to defend them from big tech