Assertion: monopoly's product | /r/HasProperty | close substitutes
Facets:
Source sentences:
text: Pure monopoly exists when a single firm is the sole producer of a product for which there are no close substitutes.
text: Unique product: no close substitutes for the firm’s product.
text: Monopoly is a term used by economists to refer to the situation in which there is a single seller of a product (i.e., a good or service) for which there are no close substitutes.