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An artificial monopoly is a monopoly created by law, for example, the state makes an arrangement with a specific post service, making it the main or the only postal service in the country.

A natural monopoly is a monopoly that is no enforced but which emerges due to high infrastructure costs, so for example the infrastructure of water supply makes the company who built the pipes the monopoly.

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An artificial monopoly is a monopoly created by law, for example, the state makes an arrangement with a specific post service, making it the main or the only postal service in the country. 

A natural monopoly is a monopoly that is no enforced but which emerges due to high infrastructure costs, so for example the infrastructure of water supply makes the company who built the pipes the monopoly.