All economies in the world have some aspects of each of the three economists that you have mentioned here. However, if I had to choose one, I would say that France's modern economy is more closely related to the work of John Maynard Keynes than that of Marx or Smith. The current French system has much more government involvement in the market place than say the American system; which is more aligned with Adam Smith's free market principles. In France, the government maintains some control over certain vital services such as energy production. This more in line with Keynesian economic policy, which prescribes that SOME government intervention into the free market is advisable in certain situations.