A new Development Economics is being built, combining the return to the heritage of the “old” Structuralism with contributions brought by the renewal of the Institutionalism. This paper begins with a balance of the first development economists’ contributions and insufficiencies and of the neoclassical approach of the 1980’s (first section), subsequently introducing some essential aspects of institutionalist contributions, including how the neo-institutionalist Douglass North puts the problem of institutional change and, as a result, contributes to the return of a perspective of change in the study of economic development (second section). In the third section we return to the problem of structural change, following the discussion about the developmental state that a new generation of development economists has been holding since the late 1980’s, so that we can observe how the set of inter-relations between state, market and politics is being established, towards an interpretation of economic development that we could call institutionalist structuralism.