At the heart of the analysis of Accrual Accounting and Equity Valuation by James A. Ohlson and Xiao-Jun Zhang is the suggestion that there exists an algebraic transformation of financial transactions which, if followed systematically, allows firm value to be expressed exclusively in terms of the firm's residual earnings and net operating assets. If one interprets the algebraic transformation as an accounting process, which is not unreasonable, then this suggests that there exist processes that result in firm value being expressed without reference to underlying cash flows and/or other noncash information that affects valuation (e.g., credit sales and purchases). In other words, there exist processes that allow firm value to be expressed parsimoniously.l Demonstrating the existence of an process (i.e., an algebraic relation) that results in firm value being expressed exclusively in terms of earnings and assets is a very simple idea, and not inelegant. It is an idea, however, with no economic context. Based on the questions that arose during the conference discussion of the paper, this seemed to be the focal point of the debate concerning the paper's contribution. For example, the premise underlying the paper is that firm value, as expressed in terms of cash flows and other noncash information, is common knowledge. If firm value is common knowledge, however, why does anyone care whether it can be summarized as an expression that involves
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