Introduction -- Methodological perspective -- Market power: antitrust policy and economic regulation -- Social regulation: imperfect information and externalities -- Public production -- Policies to correct market failures: synthesis and assessment -- Market failure and social goals policies:...

Post Keynesian theory as opposed to Walrasian theory does not provide the foundations for a unique general equilibrium but claims the existence of multiple equilibrium positions. In this article, such a multiple of equilibrium positions is explained by different market constellations which are...