关键词: 投入产出, 结构分析, 供给驱动, 对偶

Abstract: As an empirical research method, input-output technique is widely used in the analysis of practical economic problems, but the understanding of the assumptions and properties of the model is the premise of correct use of the method The prominent characteristics of input-output model are productioncentered, structured and systematic Demanddriven quantity model and costdriven price model constitute the core framework of input-output technique, both of which are productioncentered The interaction between industries reflected in the quantitative model and the price model includes not only direct but also indirect connections, therefore it is a structural methodology From the systematic point of view, this framework takes production as the core to form the endogenous boundary of the model and can further adjust the endogenous boundary and concept In addition, the supply driven model is established by introducing distribution coefficient, and Leontief inputoutput model is extended to generalized inputoutput model by being combined with optimization model, which constitute the systematic frameworkFocusing on the basic properties of inputoutput model, this paper fully discusses some basic issues of the framework, including the nature of structural description, the determination and adjustment of the endogenous boundary of the system, the symmetry of the demanddriven and supplydriven modelling system, and the duality of the generalized input-output system From the discussion, the thoughts of the authors on the properties of input-output framework are proposed

Key words: inputoutput, structural analysis, supply driven, duality