[1] Hong Kong Polytech Univ, Sch Accounting & Finance, Hong Kong, Hong Kong, Peoples R China
[2] Univ Calif Santa Barbara, Dept Econ, Santa Barbara, CA 93106 USA
[3] Univ Calif Santa Barbara, Dept Econ, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
[4] Duke Kunshan Univ, Environm Res Ctr, Kunshan, Jiangsu, Peoples R China
[5] Duke Univ, Nicholas Sch Environm, Durham, NC 27706 USA
[6] IZA, Bonn, Germany
[7] NBER, Cambridge, MA 02138 USA