What is it called when one power controlled the trade exports of another?

When one power controls the trade exports of another, it is known as economic imperialism. This typically occurs when a stronger and more economically advanced country exerts its influence over a weaker nation's economy by controlling its trade agreements, tariffs, and access to foreign markets.

Economic imperialism can take various forms, such as imposing unequal trade agreements, establishing exclusive trading monopolies, or manipulating currency exchange rates to benefit the controlling power. This can have significant impacts on the economy of the dominated nation, leading to economic dependency, limited access to markets, and exploitation of resources.

Historically, economic imperialism has been a common strategy used by colonial powers to maintain control over their colonies and extract resources for their own benefit. It can also be seen in modern times through practices such as debt-trap diplomacy, where powerful countries provide loans to developing nations with the intention of gaining control over their resources and economic policies.

Overall, economic imperialism represents a form of economic dominance and exploitation that can have far-reaching consequences for the affected country's economy and sovereignty.