 Reinerts claims poor country's concentrating their production on industries with diminishing returns to scale will lead them to become more inefficient the more they invest while the opposite thing will happen to the rich countries with their primarily increasing returns to scale industries.This, he argues, is why following Ricardian Economics, mainly his theory of comparative advantage, will, instead of leading to the factor price equalisation neo-liberals profess, in fact usher poor countries into "specialising in being poor and inefficient".Paul Krugman, however, takes use of increasing returns to scale in his New Trade Theory to explain the success of the industrialised countries, but leaves out diminishing returns to scale explaining the misery of the Third World.