Peer Effects of Corporate Disclosures: Evidence From the Registration-Based IPO System in China

China launched the registration-based IPO system in 2019 whereby all firms listed on the newly established STAR board ("peer firms") are required to disclose specific innovation and industry-related information in their prospectus. Using this event as a quasi-experiment, our study investigates the causal effects of peer firms' disclosures on individual firms' disclosure strategy. We find that the precision of individual firms' management earnings forecast (MEF), both its form and width, significantly decreases when peer firms disclose more information during the IPO period. In cross-sectional analyses, we find this effect to be more pronounced for individual firms that are likely to experience greater competitive pressure from industry peer firms and firms with higher risks and performance uncertainty that make them more cautious to external competitive pressure. This result suggests that peer firms' disclosures induce greater competitive pressure and uncertainty about future firm performance, triggering managers of individual firms to adopt a more cautious disclosure strategy. Overall, our study extends the literature on the peer effects in corporate disclosure decisions and documents potential unintended consequences of mandatory disclosure policies.