This study investigates whether common auditors have an impact on firms’ green innovation. Using a sample of Chinese listed firms, we find the common auditor ties to firms with green patents are positively related to focal firms’ green innovation. When examining underlying mechanisms behind such effects, we observe that our main findings are more profound for focal firms with more opaque information, communicating with auditors intensively and audited by senior auditors, which indicates information sharing serves as the plausible mechanism. Cross-sectionally, our findings are more remarkable for non-SOEs, firms with lower financial constraints, firms located in regions with environmental courts, local auditors, auditors with green auditing abilities and firms in the same industry. Further analysis suggests that the common auditor ties to firms with green patents can further improve focal firms’ environmental performance and green patent citations, which in turn boosts market share of involved audit firms. Overall, we document that common auditors have a positive spillover regarding green innovation to connected clients through transferring valuable green expertise in a legitimate way.

How does information sharing affect consumers' usage of FinTech credit? Using a unique dataset of ``Buy Now, Pay Later (BNPL)" users from a large digital platform and exploiting a credit reporting policy change, we document that consumers significantly reduce their usage of BNPL credit when the BNPL lender becomes subject to credit reporting regulation. This reduction is more pronounced among borrowers with previous default records, who also become more disciplined in repayment behaviors, than those without such records. The decrease in BNPL usage also leads to a reduction in online consumption, supporting the financial constraint hypothesis. Our results suggest that information sharing can help alleviate overborrowing and overspending, with stronger effects observed among younger borrowers, those who previously consumed more, or those with credit cards. We also highlight the synergies between BNPL lending and Big Tech platforms' ecosystems, which imperfectly substitute for formal enforcement institutions.

By using a unique proprietary dataset and implementing the Wuhan (China) lockdown from January to April 2020 as a natural experiment, we find that individual mutual fund investors in Wuhan significantly reduced their trading frequency, total investment of their portfolios, and risk level of their invested funds during the lockdown period as compared to investors in other cities. These changes are stronger for older investors and are reversed soon after the lifting of the lockdown. Our results suggest that the elimination of face-to-face interaction among individual investors reduced their information sharing, which led to more conservatism in their financial trading. These results are not supported by the alternative explanations of limited investor attention and temporary changes in personal circumstances, including depression and/or income reduction, during the lockdown period. Finally, consistent with the theory of naïve investor trading, we also find that investors received higher trading returns during the lockdown.