1. Department of FinanceNational Taiwan UniversityTaipei Taiwan
2. Center for Research in Econometric Theory and ApplicationsNational Taiwan UniversityTaipei Taiwan
3. Department of Financial Engineering and Actuarial MathematicsSoochow UniversityTaipei Taiwan
4. Institute of StatisticsNational Tsing Hua UniversityHsinchu Taiwan
5. School of BusinessUniversity of KansasLawrence Kansas