This paper examines the different interactions that can exist between an independent central bank
and the economic policy in a country. The focal point of this survey is based on the « temporal
incoherence »problem raised in the years 1970 by Prescott and Kydland. These two authors arrived
to the conclusion that, the separation between public authorities and monetary authorities would
guarantee an economic stability. The rush observed since some years of the central banks toward the
independence vis-`a-vis of public authorities contributed to carry a decisive stroke to the economic
policy’s efficiency thus