Special items, Extraordinary items, Market efficiency, Disclosures

In Gonedes [5], the results of an empirical analysis of accounting-based and market-based estimates of systematic risk were presented. These results suggested that there is, in general, a “statistically significant” relationship between accounting-based and market-based estimates of systematic risk at the level of individual securities, if the accounting-based estimates are conditional upon first-differences or scaled first-differences of the accounting numbers. The differencing transformation seemed to induce relatively better specified models for the accounting numbers.