杨 青1，Steven Toms2，Besim Burcin Yurtoglu3
(1.复旦大学金融研究院，上海，200433, 中国；
2. York Management School, University of York, Sally Baldwin Buildings-Block A, Heslington, York, YO10 5DD,UK;
3.Department of Economics, University of Vienna, BZW, Brunner Street 72, A-1210 Vienna, Austria)
