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The purpose of this paper is to explore the impact of the mechanisms of corporate governance on the volatility of companies’ financial profitability.

For the period 2002-2014, the authors evaluate the relations linking various indices involved in corporate governance with the systematic risk supported by these companies for a sample of 355 firms domiciled in Europe. To empirically test these relationships, the authors calculated a synthetic index of corporate governance quality (QGI) based on the 53 items of assessment of the companies’ governance proposed by the database ASSET4. Following the method used by Boncori et al. (2016), the authors first reduced the number of dimensions of corporate governance by performing a principal component analysis of the sample, which resulted in the following five components: management’s shareholder commitment, shareholder …