1. School of Public Economics and Administration; Shanghai University of Finance and Economics; Shanghai 200433 China
2. Manchester Institute of Innovation Research; Manchester Business School; University of Manchester; Manchester M13 9PL United Kingdom
3. School of Public Policy; Georgia Institute of Technology; 685 Cherry Street NW Atlanta GA 30332-0345
4. Enterprise Innovation Institute and School of Public Policy; Georgia Institute of Technology; 75 Fifth Street NW Atlanta GA 30308