Institution: | 1 Department of Statistics and Actuarial Science, The University of Hong Kong, Pokfulam Road, Hong Kong hrntlwk{at}hku.hk 2 Department of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong maling{at}ust.hk 3 Department of Applied Mathematics, The Hong Kong Polytechnic University, Kowloon, Hong Kong mathwong{at}polyu.edu.hk |