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.