Pre-announcement information is private information gathered in anticipation of a public disclosure. Event-period information is private information useful in conjunction with the announcement itself. Typically rational models of trade are based exclusively on one type of information. Such models are less descriptive of real market settings and misspecified empirically. Therefore, we introduce a model of rational trade with both features and discuss its implications.

This paper presents a model that relates properties of the analysts' information environment of the properties of their forecasts. First, we express forecast dispersion and error in the mean forecast in terms of analyst uncertainty and consensus (that is, the degree to which analysts share a common belief). Second, were reserve the relations to show how uncertainability and consensus cab be measured by combining forecast dispersion, error in the mean forecast, and the number of forecasts. Third, we show that the quality of common and private information available to analysts can be measured using these same observable variables. The relations we present are intuitive and easily applied in empirical studies.