National Bureau of Economic National Bureau of Economic Research
（3）
Caroline Minter Hoxby (EDT)/ National Bureau of Economic Research (COR)
（1）
John B. Taylor (EDT)/ John B. Taylor/ National Bureau of Economic Research Conference on Research in busines (COR)
（1）
Josh Lerner (Harvard Business School and National Bureau of Economic Research),Ann Leamon (Senior Research Associate at the Harvard Business School)
（1）
