The Percolation of Knowledge across Space

IF 3.8 1区 经济学 Q1 ECONOMICS
Pierre Cotterlaz , Arthur Guillouzouic
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引用次数: 0

Abstract

This paper shows that the negative effect of geographical distance on knowledge flows stems from how firms gain sources of knowledge through their existing network. We start by documenting two stylized facts. First, in aggregate, the distance elasticity of patent citations flows is sizable and has remained constant since the 1980s, despite the rise of the internet. Second, at the micro level, firms’ network of knowledge sources expands through existing knowledge sources. We introduce a framework featuring the latter phenomenon, and generating a negative distance elasticity in aggregate. The model predicts Pareto-distributed innovator sizes, and citation distances increasing with innovator size. These predictions hold well empirically. We investigate changes of the underlying parameters and geographical composition effects over the period. While the distance effect should have decreased with constant country composition, the rise of East Asian economies, associated to large distance elasticities, compensated lower frictions in other countries.
知识在空间中的渗透
研究表明,地理距离对知识流动的负面影响源于企业通过现有网络获取知识来源的方式。我们从记录两个程式化的事实开始。首先,总体而言,专利引用流动的距离弹性相当大,自20世纪80年代以来一直保持不变,尽管互联网兴起。第二,在微观层面上,企业的知识源网络通过现有的知识源进行扩展。我们引入了一个具有后一种现象的框架,并在总体上产生负距离弹性。该模型预测了创新者的帕累托分布规模,并且引文距离随创新者规模的增加而增加。这些预测在经验上站得住脚。我们研究了这一时期的基本参数变化和地理组成效应。虽然距离效应应该随着国家构成的不变而减少,但东亚经济体的崛起与较大的距离弹性有关,弥补了其他国家较低的摩擦。
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来源期刊
CiteScore
5.80
自引率
6.10%
发文量
98
期刊介绍: The Journal of International Economics is intended to serve as the primary outlet for theoretical and empirical research in all areas of international economics. These include, but are not limited to the following: trade patterns, commercial policy; international institutions; exchange rates; open economy macroeconomics; international finance; international factor mobility. The Journal especially encourages the submission of articles which are empirical in nature, or deal with issues of open economy macroeconomics and international finance. Theoretical work submitted to the Journal should be original in its motivation or modelling structure. Empirical analysis should be based on a theoretical framework, and should be capable of replication.
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