Croissance et Investissement: retour à l'économie de l'offre ?

In a enlarged néoclassical growth theory tradition, we presents the links between economic growth and investment. We argue that the business investment is both the main signal and cause of a new growth "potential". We study what are the main determinants of investment and show why and how its value is becoming too low in European countries (and specialy in France). Entrepreneurship spirit looks very important and has to be restaured by supply-side and societal reforms.