Qingfu Liu
Institute for Financial Studies
Fudan University
Shanghai, China
Yunbi An1
Odette School of Business
University of Windsor
Windsor, Ontario, Canada N9B 3P4
October 22, 2009

This research was supported by the National Nature Science Funds of China (70873055).
1 Corresponding author: Odette School of Business, University of Windsor, Windsor, Ontario, Canada N9B 3P4
E-mail: yunbi@uwindsor.ca.