There exists four primary specifications of interest risk price under the framework of affine DTSM: Completely affine model(CAM),essentially affine model(EAM),extended affine model(EXAM),semi-affine Model(SAM).It has been proved both in theory and empirical studies that EAM is superior to CAM,and that EXAM and SAM are both superior to EAM.But no theoretical evidence and few empirical studies could help to determine a better model between semi-affine model and extended affine model.So this paper ...