We study voluntary cost disclosure by duopoly firms when they can invest in a cost-reduction technology, i.e., when their private cost is endogenously determined. We find that, contrary to most of the literature, firms disclose their endogenous cost information regardless of the type of competition. The underlying mechanisms and welfare implications, however, are different. Under Bertrand competition, cost disclosure helps a firm avoid aggressive investment in cost reduction to coordinate actions to the mutual advantage of the duopoly firms. Under Cournot competition, disclosing cost information enables a firm to show a hardened stance toward the competing firm. Although firms gain from their disclosure decisions under Bertrand competition, their disclosure decisions under Cournot competition place them in a prisoner’s dilemma, as both firms would be better off if they chose not to disclose their information. Consequently, consumers may lose under Bertrand competition but gain under Cournot competition.

Following securities law violations, regulators can require firms to hire a corporate monitor to implement reforms that limit future misconduct and protect investors. We examine the determinants of including a corporate monitor as equitable relief in an enforcement action, as well as their effectiveness in promoting positive change at a firm. Using a structural equation model that jointly determines monetary and nonmonetary sanctions, we find that monitor assignments are related to the nature of the offense, violation severity, and investor harm. We also find that monitors with targeted accounting oversight responsibilities are associated with improved corporate culture, a higher likelihood of financial restatements during their tenure, and enhanced financial reporting credibility at the firms they oversee relative to enforcement firms without such monitors. Although corporate monitors can foster positive change, their impact depends on the scope of their responsibilities. Data Availability: Data are available from the public sources cited in the text.