The Wang Yanan Institute for Studies in Economics, Xiamen University, Xiamen 361000, China.|The Wang Yanan Institute for Studies in Economics, Xiamen University, Xiamen 361000, China.|The Wang Yanan Institute for Studies in Economics, Xiamen University, Xiamen 361000, China.|The Wang Yanan Institute for Studies in Economics, Xiamen University, Xiamen 361000, China.