Using the model of discretionary disclosure suggested in Verrecchia (1983), I show that an increase in the quality of private information received by a manager results in more disclosure on his part. I also discuss how this result influences a manager's choice over levels of quality.

In the preceding paper Darrough and Stoughton suggest that firm interdependence, modelled as an entry game among firms in a product market, can yield endogenous proprietary costs. This allows the costs associated with the dissemination of information about the firm to depend upon the information's content in some direct way. My comments focus on: first, the structure of the game, which emphasizes the potential for full disclosure; second, the extent to which the entry game exaggerates the usefulness of ‘bad news’; and third, their suggestion that more competition among firms implies more, and not less, disclosure, an observation seemingly contrary to Verrecchia (1983).

This paper presents a partially revealing rational expectations model of competitive trading to identify two effects of information releases; an informedness effect and a consensus effect. The informedness effect measures the extent to which agents become more knowledgeable, and the consensus effect measures the extent of agreement among agents at the time of an information release. We demonstrate that informedness and consensus generally occur jointly when information is disseminated, and that unexpected price changes and trading volume are each influenced by both informedness and consensus. Thus, interpretations of unexpected price changes and volume associated with information releases are conceptually similar. Since informedness and consensus each affect both the variance of price changes and volume, our paper provides an economic rationale for examining both price and volume effects at the time of information releases.

[This paper presents a partially revealing rational expectations model of competitive trading to identify two effects of information releases; an informedness effect and a consensus effect. The informedness effect measures the extent to which agents become more knowledgeable, and the consensus effect measures the extent of agreement among agents at the time of an information release. We demonstrate that informedness and consensus generally occur jointly when information is disseminated, and that unexpected price changes and trading volume are each influenced by both informedness and consensus. Thus, interpretations of unexpected price changes and volume associated with information releases are conceptually similar. Since informedness and consensus each affect both the variance of price changes and volume, our paper provides an economic rationale for examining both price and volume effects at the time of information releases.]