Accounting for goodwill and identifiable intangibles is one of the most controversial issues in financial reporting. It has been on the agenda of the Australian Accounting Standards Board, the US, UK, and the International Accounting Standards Boards, and the Full High Court of Australia. The Australian Securities and Investments Commission has also placed accounting for intangibles in its Media Releases directed at specific companies. Evidence suggests that the materiality of goodwill and identifiable intangible assets in corporate statements of financial position for a large number of companies is the reason for the considerable attention given to goodwill and identifiable intangibles. The present study has two objectives. First, it analyses the Australian market perception of goodwill and identifiable intangibles as assets in the determination of the market valuation of companies. Second, it investigates whether the market perceives goodwill and identifiable intangibles as wasting resources when valuing Australian firms. In order to achieve these objectives, the analysis initially develops and estimates a model (the asset-based model) that uses financial position statement items to explain the market value of companies' equity. This model examines the association between reported goodwill and identifiable intangible asset values and companies' market values. Given Ohlson's (1993) argument that companies' market value might be better explained by a model that includes a stock concept of value and a flow concept of earnings, a second model (the asset and income-based model) that incorporates an income variable into the initial model, is then developed and estimated. This model examines the association between the goodwill and identifiable intangible amortisation expense and companies' market values. Evidence suggests that there is a statistically significant negative association between equity market values and write-offs of goodwill, confirming the market perception of write-offs of goodwill as a wasting resource when valuing companies. Evidence also suggests that there is a statistically significant negative association between equity market values and write-offs of identifiable intangibles, at least for the total sample of the present study, providing limited evidence of the market perception of identifiable intangibles as wasting resources when valuing companies. However, the negative and inconsistently significant association between equity market values and write-offs of identifiable intangibles on an annual basis suggests that the relationship may be more complex than traditionally analysed / Doctor of Philosophy (PhD)