Theoretical framework of public policies for welfare maximization

The welfare state concept, which is related to welfare economics, has taken place in economics literature once again in recent years. The theories and theoretical supports are various. In this study, at first the concept of welfare economics was applied and then addition of Smith were added in the historical period. On the other hand , the welfare economics which is based on Pareto, Pigou and Hicks-Kaldor’s theories and also The social welfare function theory were examined. At the end of the last part of study, the reasons of the government’s interference on economics is appraised aorund the framework of the pareto optimal deviations