Nowhere is fintech disruption more apparent than in the small business lending space. It's a classic David and Goliath story, with online startups taking market share from community banks and Wall Street giants alike. But the truth is that sometimes David wins, sometimes Goliath wins, and sometimes the right answer involves a combination of the two.

Karen G. Mills is a leading authority on the changing state of small business lending, literally writing the definitive paper, "The State of Small Business Lending: Innovation and Technology and the Implications for Regulation." A Harvard Business School professor and former member of President Obama's cabinet as the Administrator of the Small Business Administration, Karen has keen insight into how the winners and losers in this competitive space will be defined, and recently published a strategic map for banks: "How Banks Can Compete Against an Army of Fintech Startups: Four Approaches."