Arping, Stefan; Sautner, Zacharias - 2010 - This version: November 2010
We study whether the Sarbanes-Oxley Act (SOX) of 2002 made firms less opaque. For identification, we use a difference …-in-differences estimation approach and compare EU firms that are cross-listed in the US-and therefore subject to SOX-with comparable EU firms … that, relative to the control group, cross-listed firms became significantly less opaque after the implementation of SOX …