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In this paper, we develop the idea of the Sraffian Supermultiplier, presenting it as an alternative to traditional neoclassical thought about economic growth and economic policy. Thus, a brief introduction is made about the importance of economic growth for classical economists, followed by the development of Harrod's model and the different solutions that have raised for sorting the problem of instability. Finally, we present the supermultiplier model of Serrano together with international empirical evidence that supports it and some proposals of economic policy are made. [ABSTRACT FROM AUTHOR]

In this article, we show the historical development of different conceptions of political economy, criticizing the hegemonic pretention of neoclassical economics, and highlighting what we call the "new political economy": the study of the social, political and moral constitution of the economy in history. We describe this interpretation's current disciplinary insertion in political science, and offer two analytical keys to orient future investigations. Finally, we survey recent works in Latin America that echo this interpretation, especially the revisions of the 'political economy of policy reform' literature and the widening of studies on varieties of capitalism. [ABSTRACT FROM AUTHOR]