Text-Based Network Industries and Endogenous Product Differentiation
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We study how firms differ from their competitors using new time-varying measures of product differentiation based on text-based analysis of product descriptions from 50,673 firm 10-K statements filed yearly with the Securities and Exchange Commission. This year-by-year set of product differentiation
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美国国家经济研究局创建时间：
2010-05-01
