The study on the time lag of knowledge spillovers process is one of the key steps to solve the measurement of knowledge spillovers, which is a difficult problem in the field of technological innovation and regional economic growth. From the perspective of knowledge spillovers, it studies time lag during the R&D process based on the influence factors of R&D time lag, main sources and existing research. Then, taking Beijing area as the research object, it applies the knowledge production function to measure R...
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