Soufiene Assidi - GEF۲A, El Manar University, Tunisia
Khaoula Aliani - GEF۲A, Business Department, College of Business Administration, PNU, Saudi Arabia
Mohamed Ali Omri - GEF۲A, Faculty of Economics and Management, University of El Manar, Tunisia

The paper investigated the relationship between corporate tax optimization and the firm s value in the Tunisian context over an 11 year period. The empirical results revealed that tax optimization, accruals and investment increased the firm s value. After dividing the sample between listedand non-listed firms, we concluded that, compared to non-listed firms, the listed firms were better able to optimize tax through adopting a taxpolicy. Our findings help decision makers, researchers and practices to better understand the role of tax optimization in the management of firms and, also, in their performance.

Firm value; Tax optimization; Listed and non-listed firms; Tunisia