Product market competition and disclosure content differentiation: A topic modeling analysis

We examine how product market competition affects firms' disclosure content. Theory suggests that competition leads firms to strategically disclose to avoid proprietary costs; however, the empirical evidence has been mixed. We investigate whether firms manage disclosure content to protect proprietary information, a disclosure strategy under-researched in the literature. We use a topic-modeling technique to extract and compare thematic topics that industry peers disclose in management discussion and analysis (MD&A) in 10-K filings. Exploiting large reductions in US import tariff rates as an exogenous shock to product market competition, we find that firms differentiate disclosure topics in response. This effect is more pronounced when disclosures incur higher proprietary costs, as theoretically predicted, and stronger for firms with greater product similarity to industry peers and those with longer MD&A disclosure texts.