Assertion: monopoly's product | /r/HasProperty | identical
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Source sentences:
text: Whenever there is variety, and hence some amount of brand loyalty, firms will have some market power, i.e. some ability to raise prices without driving customers away (when products are identical, as required for textbook pure competition, an increase in the price above a nearby competitor's price would result in the loss of all customers -- why pay more for the exact same product?).