Harvard economist Robert Z. Lawrence says that the model used by the Tufts researchers "is simply not suited for credibly predicting the effects of the TPP" and argues that the model used by Petri and Plummer is superior. Lawrence argues that the model used by the Tufts researchers "does not have the granularity that allows it to estimate variables such as exports, imports, foreign direct investment, and changes in industrial structure. As a result, its predictions ignore the benefits to the TPP economies that occur through increased specialization, the realization of scale economies, and improved consumer choice." Lawrence also notes that the model used by the Tufts researchers finds that the TPP will cause GDP to fall by 5.24% in non-TPP developing countries, such as China, India, and Indonesia, which Lawrence is highly skeptical of: "It is not believable that a trade agreement of this magnitude could cause the rest of the world to plummet into recession." Harvard economist Dani Rodrik, a well-known skeptic of globalization, says that the Tufts researchers do "a poor job of explaining how their model works, and the particulars of their simulation are somewhat murky... the Capaldo framework lacks sectoral and country detail; its behavioral assumptions remain opaque; and its extreme Keynesian assumptions sit uneasily with its medium-term perspective."