This paper provides a model in which audited reports are valuable to entrepreneurs who have private information and seek to share risks with investors. A distinctive feature of the model is that the choice of auditor and the resulting audited report provide partial information about the entrepreneur's private information, and he resolves all remaining investor uncertainty by signalling with retained ownership. The value of an audit is increasing in audit quality and the firm-specific risk faced by the entrepreneur and is a nondecreasing function of the entrepreneur's expectations about the future value of the firm.

This paper reports empirical tests of an hypothesized positive relation between audit quality and firm-specific risk that is predicted by Datar, Feltham, and Hughes' (1991) theoretical analysis of auditor choice when firms go public. Three types of proxies for ex ante firm-specific risk are used to test this relation: regression coefficients that theory relates to the firm-specific risk, ex ante proxies available from prospecti, and ex post variances in returns. Results from the first are moderately consistent with our hypothesis, while those from the latter two are either mixed or contrary.