竞争对手分析
产品差异化
竞赛(生物学)
产品(数学)
相似性(几何)
产业组织
集合(抽象数据类型)
业务
营销
经济
微观经济学
计算机科学
数学
程序设计语言
人工智能
图像(数学)
生物
生态学
古诺竞争
几何学
作者
Gerard Hoberg,Gordon M. Phillips
摘要
We study how firms differ from their competitors using new time-varying measures of product similarity based on text-based analysis of firm 10-K product descriptions. This year-by-year set of product similarity measures allows us to generate a new set of industries in which firms can have their own distinct set of competitors. Our new sets of competitors explain specific discussion of high competition, rivals identified by managers as peer firms, and changes to industry competitors following exogenous industry shocks. We also find evidence that firm R&D and advertising are associated with subsequent differentiation from competitors, consistent with theories of endogenous product differentiation.
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