In economics, a production-possibility frontier (PPF) or "transformation curve" is a graph that shows the different rates of production of two goods that an individual or group can efficiently produce with limited productive resources. - Read more

les Amis de l'Euro Site numismatique dédié à la monnaie euro, les dernières actualités, les pièces courantes et commémoratives, les billets, un catalogue, les accessoires, des petites annonces, des forums, numismate, pieces euro, piece euro - Read more