Towards an understanding of profitability analysis within the residual income valuation framework

This paper argues that there is a mis-match between formal theoretical accounting valuation models, and practical approaches to profitability analysis and valuation. In particular, none of the linear information models published to date exhibit an obvious role for profitability analysis. For example, in the standard Ohlson model, earnings and book value apparently summarise all the value relevant information available from the firm's financial statements and there is no apparent need for any further investigation of the accounting numbers beyond these specific line items. The purpose of this paper is to attempt to investigate potential analytical links between formal valuation models and practical profitability analysis. Specifically, we attempt to show how key features of practical profitability analysis might be incorporated into formal valuation models. In this respect there are two particular aspects of valuation practice to which the formal models published to date have paid no attention. First, in practice we often see explicit reference made to the demand side (sales), and supply side (costs) of the business. Second, we often see attempts to benchmark the financial ratios of one firm against the corresponding ratios of firms in the same industry. The purpose of this paper is to attempt to explain why such practices make sense in the context of an attempt to model the principal determinants of firm value within a residual income valuation framework.