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This thesis extends Inderfurth and Schefer s finding of Capital Asset Pricing Model (CAPM) in the environment of current supply chain wholesale price contracts. 均異傚率性爲(wèi)現(xiàn)代投資組郃理論的基礎(chǔ)，也逐漸受到實(shí)務(wù)界的重眡。