Innovation and Endogenous Knowledge Network Dynamics

蔡洁

<p><span style="font-family: Arial;">&nbsp;We study innovation and endogenous knowledge-network evolution in a general equilibrium framework with heterogeneous firms and long-run growth. The empirical examination uses patent-citation data to track the formation of new links in the knowledge network across technological categories. We find that these new links are formed infrequently and tend to connect high-quality innovations and large firms on both ends. Formation of such new links boosts innovation and real performance of firms on both ends with positive spillovers to other firms. We build a tractable model to rationalize these findings and study the aggregate implications of knowledge-network dynamics. In the model, the knowledge network evolves endogenously as each firm searches for others as knowledge-input suppliers and attracts others as users of its own knowledge. We characterize the stationary equilibrium path in closed-form and show that denser networks are associated with faster growth. The calibrated model suggests that cross category knowledge network dynamics account for more than a half of growth in the US and explain almost two thirds of the growth slowdown.</span></p> <p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>

2025-04-18 (Friday) 16:40-18:10

经济楼D136

English

厦门大学经济学院、王亚南经济研究院、邹至庄经济研究院

厦门大学经济学院国际经济与贸易系

系列讲座

陈老师xiaohongchen@xmu.edu.cn

杨曦

<p><span style="font-family: Arial;">蔡洁，上海财经大学经济学院常任副教授，毕业于加拿大<span lang="EN-US">University of Britisch Columbia</span>，研究方向为经济增长和国际贸易。曾经在<span lang="EN-US">Review of Economic Studies, Journal of International Economics, American Economic Journal: Macroeconomics, Economic Modelling</span>等杂志发表文章。</span></p>

国际经贸青年学者论坛第87讲