The article aims to sketch the general framework of a model for evaluation of policy implementation based on concepts drew from the neoinstitutional theory. It seeks to stablish a line between implementation and institutional change. From that on, analysis are developed upon the concepts of path dependence and transactions costs. Path dependence is employed in order to provide the tracks that sustained the process of institutional change and transaction costs sets the basis for identifying and evaluating the implementation effects, both stressing the transformtive potential carried by new institutional arrangements over governmental practices. The proposed model addresses the rising of innovative policies that emerged, mainly, since 1988 and highlights its use for participatory policy's analysis and evaluation.
Public Plolicy; Implementation; Neoinstitucional Analysis