Reformulation du modèle macroéconomique de la nouvelle synthèse : crédits, politique monétaire et écarts de taux

This paper intends to watch and teach the macroeconomic processes with a joint view on monetary policy. It endorses the main ideas expressed by the three equations model of the New Neo-Keynesian Synthesis and to which it adds one loanable funds equation.This widening to credit questions has concrete implications for the role played by the interest gap value and yields curve as a special indicator for effective monetary policy implementation.Besides we emphasize also the non orthodox forms of the central banks' policy. This new four equations model is convenient to make clear the macroeconomic relations for the short run and "normal" periods .It also be a good starting point for studying economic and financial crisis