With an annual tax expenditure of over 6 billion euros, the Research Tax Credit (CIR) is the main instrument for supporting innovation in France. The impact of this scheme on companies’ research and development (R&D) expenditure has been measured (see, in particular, previous work by the IPP), suggesting a causal effect of around one additional euro of private R&D expenditure for every euro of tax expenditure. However, a scheme of this scale is highly likely to have a profound impact on firms’ employment and investment behaviour, as well as on their economic performance.

