Abstract: Knowledge is not only an endogenous variable, but also an exogenous variable, which is the base to understand the characteristic of the increasing or decreasing return of hi-tochnology in knowlodgc-bascd cconomy.
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文摘:知识既是内生变量,又是外生变量,这是理解高科技知识报酬递增与递减特点的基础。
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