Multi-period Risk Measures and Multi-stage Portfolio Selection problems a dissertation submitted to Xi'an Jiaotong University in partial fulfillment of the requirement for the degree of Doctor of Natural so B Jia liu Supervisor: Prof. Zhiping Chen (Mathematics) February 2017Multi-period Risk Measures and Multi-stage Portfolio Selection Problems A dissertation submitted to Xi’an Jiaotong University in partial fulfillment of the requirement for the degree of Doctor of Natural Science By Jia Liu Supervisor: Prof. Zhiping Chen (Mathematics) February 2017