We call an economy that is self-contained and does not engage in any trade with outsiders:

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An autarky is an economy that relies only on its own resources and does not engage in trade with other countries. This can be due to factors such as political isolation, economic sanctions, or a lack of resources that would make trade beneficial. Oligopoly refers to a market structure in which a few large firms dominate the industry, while oligarchy refers to a form of government in which a small group of people hold power. Monarchy is a form of government in which a monarch (usually a king or queen) holds supreme power. None of these terms refer to a closed economy that does not engage in international trade.

We Call an Economy That Is Self-Contained and Does Not