Richard Thaler, the winner of the Nobel Prize in Economics, discusses volatility in stocks and says stocks can't be based on the certitude that there will be a massive tax cut. Prior to that, Kevin Hassett, the chair of the Council of Economic Advisers, says tax reform deserves bipartisan support. Luigi Zingales, a finance professor at the University of Chicago's Booth School of Business, says it's impossible to think about economics without behavioral economics. Finally, Olivier Blanchard, a senior fellow at the Peterson Institute, says tax reform won't boost growth.