As part of the response to the call from France Strategy, we focus on the cost of discrimination for businesses, which is both original and interesting. We want to add to the originality by dealing with two poorly-covered topics that have but could be potentially very significant: age discrimination affecting both young people and seniors limiting their prospects for access to employment and the progress of their careers, and gender discrimination, which potentially affects all businesses. Our study will rely on the exploitation of an unbalanced sample of companies with more than 20 employees resulting from a DADS-FARE-ESANE pairing over the period 2002-2015. It covers only discrimination in access to employment and does not cover wage discrimination or discrimination in career development. We will then be able to study the cross effects of these discriminations on the economic and financial performances of companies.