da Graca, Tarcisio; Masson, Robert - In: Review of Accounting and Finance 11 (2012) 2, pp. 166-183
Purpose – The purpose of this paper is to demonstrate with real data the enhanced statistical power of a GLS‐based event study methodology that requires the same input data as the traditional tests. Design/methodology/approach – The paper uses full sample, subsample and simulated modified...