Growth through Heterogeneous Innovations

被引：231
|
作者：
Akcigit, Ufuk [1 ,2 ]
Kerr, William R. [3 ,4 ]
机构：
[1] Univ Chicago, Natl Bur Econ Res, Chicago, IL 60637 USA
[2] Ctr Econ Policy Res, Washington, DC 20009 USA
[3] Harvard Univ, Cambridge, MA 02138 USA
[4] Natl Bur Econ Res, Cambridge, MA 02138 USA
来源：
JOURNAL OF POLITICAL ECONOMY | 2018年 / 126卷 / 04期
基金：
美国国家科学基金会;
关键词：
RESEARCH-AND-DEVELOPMENT; KNOWLEDGE SPILLOVERS; PATENT CITATIONS; SIZE DISTRIBUTION; LIFE-CYCLE; COUNT DATA; FIRM SIZE; COMPETITION; EVOLUTION; INDUSTRY;
D O I：
10.1086/697901
中图分类号：
F [经济];
学科分类号：
02 ;
摘要：
We build a tractable growth model in which multiproduct incumbents invest in internal innovations to improve their existing products, while new entrants and incumbents invest in external innovations to acquire new product lines. External and internal innovations generate heterogeneous innovation qualities, and firm size affects innovation incentives. We analyze how different types of innovation contribute to economic growth and the role of the firm size distribution. Our model aligns with many observed empirical regularities, and we quantify our framework with Census Bureau and patent data for US firms. Internal innovation scales moderately faster with firm size than external innovation.
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页码：1374 / 1443
页数：70
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