The Valuation Approach to Stock Market Impact: Some Tests With SSAP 16 (Current Cost Accounting) Disclosures

The purpose of this paper is to evaluate the role of security price models in measuring the impact of accounting information on financial markets. This contrasts with the more common approach of employing security returns. The tests here examine some econometric properties of the price model approach in the context of current cost disclosures required by SSAP 16. Special consideration is given to an important statistical issue likely to be met in the valuation approach, namely the heteroskedasticity of the error term. The evidence suggests that a simple security price model can provide an effective tool in accounting event studies.