Abstract：This paper constructs a theoretical framework to estimate the circular cumulative effects (CCE)of R&D inputs on the R&D-based New Economic Growth (NEG)Theory and Circular Cumulative Causation (CCC)Theory,and empirically calculates the CCE of China's regional R&D inputs from 2000 to 2016 by using provincial data.The results show that estimating CCE of R&D inputs is affected by the form of Knowledge Production Function (KPF)and the measure indictors of knowledge outputs,China's real economy more fit Jones's KPF than Schumpeterian KPF,and the CCE of R&D inputs estimated by using patents granted data more stable than new products sales data;the CCE of R&D inputs was on the whole increasing during this time,and its inter-regional difference mainly formed before 2010,now is toward stable.Finally,this paper puts forward corresponding suggestions for R&D resources allocation and regional innovation policy.
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