Unequal exchange is used primarily in Marxist economics, but also in ecological economics (more specifically also as ecologically unequal exchange), to describe the systemic hidden transfer of labor and ecological value from poor countries in the imperial periphery (mainly in the Global South) to rich countries and monopolistic corporations in the imperial core (mainly in the Global North) due to structural inequalities in the global economy.
Due to biased terms of trade and the undervaluation of labor and goods from the global South compared to the North, poor countries are forced to export a much larger quantity of labor and resources than they import to maintain a monetary balance of trade. This enables the global North to achieve a net appropriation through trade, fostering development in the former while impoverishing the global South.
The theory of unequal exchange is a rejection of the fundamental assumptions of Ricardian and neoclassical theories of comparative advantage, which claim that free trade based on comparative costs is beneficial to all parties and in turn represents the theoretical justification of neoliberal trade policies. More generally, the concept is a criticism of the idea that the operation of markets would have egalitarian effects, rather than accentuating the market position of the strong and disadvantaging the weak.
Historical background The concept of unequal exchange was first developed by dependency and world-systems theorists, who questioned the dominant assumption according to which nations’ economic performance is linked to internal conditions, like good governance, strong institutions and free markets and that lower-income countries failed to develop because of their lack of the latter.
Analyzing economic relations within the global economy, these critical perspectives contend that historically, the wealth of rich countries has depended on the appropriation of resources of countries from the Global South. According to Hickel et al., this trend has persisted beyond the historical colonial period and continues to manifest in the modern global economy. Quantifying the value of resources appropriated from the Global South through unequal exchange since 1960, they assert that the Global North's economic growth and high levels of consumption are facilitated by its extraction of value from other parts of the world through trade, especially since the 1980s.
Theoretical framework During the 1960s and 1970s, Marxist authors explored the notion of superprofit applied to global capitalism and the inequalities between core and peripheral economies.
Marxist authors like Arghiri Emmanuel, Charles Bettelheim, Christian Palloix, and Samir Amin showed how the distortions between the value and the prices of commodities circulating in the global economies had started a process of theft of socially necessary labor time (value transfer) from periphery to core countries, which was denominated global unequal exchange. The Argentinian economist Raúl Prebisch was among the first to refer to a process of unequal exchange between the peripheral and core countries, showing how the prices of raw materials exported by developing nations were lower than the goods manufactured in developed economies.
Bettelheim and Palloix further argued that, because of the monopolistic control that rich countries have on the global economy, they are able to sell commodities in the global market at prices above their market value, while for peripheral economies the prices are often lower than the production prices. This creates a transfer of value from the developing economies in the periphery to the core economies, putting a structural mechanism of unequal exchange in place.Emmanuel, Bettelheim, Amin, and Palloix, eds., Imperialismo y Comercio Internacional (1971).
Amin and Emmanuel’s understanding of unequal exchange somewhat differs from the other thinkers, as they focus on the differences between national wages as a key factor producing the conditions for unequal exchange. Amin underlined that unequal value transfers in global trade were not determined primarily by asymmetries in productivity, but by the profound wage differences between core and periphery. Emmanuel defines unequal exchange as a consequence of the structure of international trade. As prices of production are given by the sum of cost of constant capital (value of materials and goods necessary to produce a commodity) and variable capital (wages paid for the production of a commodity), lower wages imply lower prices of production for the periphery, while the socially necessary labor is independent of wage rate. Low wages in the periphery and high wages in the center, therefore, result in a set of international prices whereby the periphery sells its product at less than its social value while the center benefits from higher prices than the value of its products. According to Emmanuel, unequal exchange is determined by the differences in rates of surplus values resulting from wage differentials: this mechanism determines the exploitation of the periphery by the center.
Classification/quantification of unequal exchange Unequal exchange theory was notably advanced by Raúl Prebisch in the mid-20th century, who argued that global trade benefits industrialized nations at the expense of developing ones. Through his work with the United Nations Economic Commission for Latin America (ECLAC), Prebisch identified a pattern in which the prices of raw materials exported by Latin America, such as coffee and copper, declined relative to the manufactured goods imported from wealthy nations, a phenomenon known as the "declining terms of trade."Prebisch, Raúl. The Economic Development of Latin America and Its Principal Problems. United Nations, 1950. This led to the development of the Prebisch-Singer Hypothesis, which posited that peripheral nations, those exporting raw goods, were structurally disadvantaged in the global economy. Prebisch’s ideas laid the foundation for dependency theory and inspired policies like import substitution industrialization (ISI) to reduce reliance on imports and promote local industrial growth in developing countries.Baer, Werner. “Import Substitution and Industrialization in Latin America: Experiences and Interpretations.” Latin American Research Review, vol. 7, no. 1, 1972, pp. 95–122.
Samir Amin used a system based on wage differences to calculate the unequal exchange with the assumptions of constant productivity and using Global Northern prices. Gernot Köhler in turn used a method that also included price differentials into calculation, using differences between Purchasing Power Parity and Market Exchange rate to calculate the drain. More recently, a Marxian input–output approach combining Marx’s value theory with Leontief analysis and World Input–Output Database data has been used to quantify unequal exchange and its effects on growth across 43 countries between 2000 and 2014, showing that unequal exchange could have reduced North–South convergence by an estimated 34% during this period.
Dorninger et al. relied on the environmentally-extended multi-regional input-output modeling (EEMRIO) to quantify the unequal exchange from a perspective based on the theory of ecologically unequal exchange. Jason Hickel et al., using a similar method, calculated the amount that was drained from the Global South between the years 1990 to 2015 was equivalent to 242 trillion in 2010 US Dollars. In line with Samir Amin's original suggestion, Hickel et al. used Northern prices to quantify the physical resources that were drained from the Global South in financial terms.
Structural factors
Various historical and political factors create the structural conditions that sustain unequal exchange.
It started with dispossession and destruction of local mode of living in colonized countries (e.g. destruction of subsistence economies), that created surplus of unemployed labor. Suwandi et al. also describe the “depeasantization of a large portion of the global periphery through the spread of agribusiness” as “central to the creation of a reserve army of unemployed." They refer to the concept of global labor arbitrage, to indicate the replacement of high-wage workers in the US and other rich economies with workers in the Global South that perform the same tasks at lower wages.
Unequal exchange shows the continuation of a pattern of appropriation that characterized the colonial period, which has expanded in the post-colonial era and characterizes the structure of today’s world economy. Among the factors that enable the continuation of these patterns of appropriation, Hickel et al. identify price inequalities and power. In terms of prices, they underline that the dramatic differences in prices of manufactured goods exported by Southern and Northern countries does not match a significant qualitative difference between the labor performed respectively in the North and in the South. Contrarily to what is commonly perceived, global commodity chains in the South involve labor ranging from manual work to managerial and engineering, logistics and IT tasks, similarly to labor performed at the end of the chain in the Global North. They underline the paradox by which, due to wage disparities, highly skilled labor performed in the South might even be paid less than “unskilled” labor performed in the North.
A common critique is that wage inequalities between the South and the North can be explained by the higher productivity of northern workers in comparison to southern workers. However, productivity in conventional economics is determined by prices, not by actual productivity. Northern states and firms leverage their power within the global commodity chains to depress prices of final products, thus their productivity seems to improve as compared to their counterparts in the South, even though the production process is unchanged. Therefore, differences in wages between the Global South and the Global North can be explained by the exploitation of Southern workers, who are paid less for the same work as compared to their northern counterparts.
Looking into how price inequalities are maintained, making possible the process of exploitation just outlined, Hickel et al. point to the unequal distribution of power among countries. One central element to consider is that through patents, northern firms set prices artificially high. As 97% of all patents are held by corporations in high-income countries, this skews the equilibrium disproportionally in favor of the latter.
Another crucial factor is the geo-political imbalances in the world economy, maintained through the institutions of international economic governance: Northern countries hold the majority (despite representing the minority of the world population) within the main institutions, like the International Monetary Fund (IMF), the World Bank (WB) and the World Trade Organization (WTO, where bargaining power is determined by market size and the United States holds effective veto power).
Moreover, structural adjustments programs (SAPs) brought about massive cuts in public expenditure in the Global South, decreasing salaries, weakening labor rights and curtailing unions. Free trade agreements (FTAs) and SAPs forced global South governments to remove tariffs and subsidies and protect new industries, preventing import substitution that would have contributed to driving prices down.
Other important factors that perpetuate price inequalities are the problem of tax evasion and illicit financial flows that drive massive amounts of economic resources from Southern to Northern countries, and the structural dependence on foreign investors and access to Northern markets that forces Southern firms and countries to compete with each other, in a race to the bottom.