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According to dependency theory, Third World countries in the periphery of the global capitalist system are poor and underdeveloped because they are exploited by the advanced capitalist countries in the core. Their major problem is dependency on the core countries. That is the central claim made by dependency theory, a mode of analysis developed primarily by Latin American scholars in the 1960s and 1970s.

Dependency theory emerged as a reaction against the modernization paradigm, which dominated Western liberal approaches to development during the decades after World War II. Modernization theory argued that Third World countries should be expected to follow the same developmental path as taken earlier by developed countries in the West: a progressive journey from a traditional, preindustrial, agrarian society, toward a modern, industrial, mass-consumption society. Development meant overcoming barriers of preindustrial production, backward institutions, and parochial value systems that impeded the process of growth and modernization.

The theoretical endeavors among modernization theorists concerned identification of the full range of impediments to modernization as well as all factors that promote modernization. A famous economic modernization theory by Walt Whitman Rostow specifically stressed that the “takeoff,” the crucial push in moving from traditional toward modern, is characterized by a marked increase in modern sector investment to a minimum of 10% of the gross national product. Another critical element concerns the relationship of Third World countries to the world market. Close market relations with the developed countries are seen to have a positive developmental effect on Third World economies. Foreign trade is viewed as a road to market expansion and further growth of the modern sector. Foreign direct investment in the Third World by transnational corporations (TNCs) brings in the much needed modern technology and production skills.

Early Critiques of Liberal Economic Theory

This liberal understanding of development was subjected to increasing criticism during the 1960s and 1970s. That was partly in reaction to the lack of progress in many Third World countries at the time. While growth rates in the developed world reached unprecedented highs in the postwar decades, many Third World countries had difficulties in getting economic development under way. Their economies refused to “take off.” That naturally led to increasing dissatisfaction with modernization theory.

Already in the late 1940s, the Argentinean economist and central bank director Raul Prebisch had criticized liberal economic theory in relation to the Third World. In particular, he turned against David Ricardo's famous notion of comparative advantage according to which countries in the periphery would be better off specializing in production and export of raw materials and agricultural products, leaving advanced industrial production to the core countries. Prebisch argued that production from the periphery was subjected to deteriorating terms of trade compared with products from the advanced countries. Two factors were involved. The first is income elasticity, which states that raw materials and agricultural products are less in demand when incomes increase; consumers turn to nonfood items, and technological advance decreases the demand for raw materials. Second, because of strong labor unions in the advanced countries, productivity increases lead to real wage improvements in the core rather than to lower prices for manufactured products. In effect, comparative advantage does not work for the periphery. The core countries keep the benefits of exchange for themselves.

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