Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We present a model in which some of the firm's information (" news") can be disclosed verifiably and some information (" type") cannot, to show that some firms may voluntarily withhold good news and disclose bad news. We describe an equilibrium in which high-type firms withhold good news and disclose bad news, whereas low-type firms disclose good news and withhold bad news. Under some parameter values, this equilibrium exists when other more traditional equilibria are ruled out be standard equilibrium refinements. The model explains some otherwise anomalous empirical evidence concerning stock price reactions to disclosure, provides some new empirical predictions, and suggests that mandatory disclosure requirements may have the undesirable consequence of making it more difficult for firms to reveal information that cannot be disclosed credibly. Article published by Oxford University Press on behalf of the Society for Financial Studies in its journal, The Review of Financial Studies.