inability of market economic in creating of economic equilibrium and necessity of involvement of government

in this paper in the beginning the theoretical basis of school and neo- classic keynsian new classic and new keynsian in economic frame based on market is surveyed. then evaluating and critice performed till their weak ness is underlined in this paper the viewpoint of the scientists who are in agreement with inrolvement of state in managed aggregate of also is treated evalued. during the surveying of inability of market mechanism new propose in the field of involvement of government in economic for the leading of aggregate demand is presented