As long as it does not shut down, a perfectly competitive firm earns the maximum profit as long as it operates so that
A) its price exceeds its average total cost.
B) market demand is inelastic.
C) its price exceeds its marginal revenue.
D) its marginal revenue equals its marginal cost.
D
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Which of the following best defines economics?
A) Economics teaches how to limit our wants. B) Economics studies how to choose the best alternative when coping with scarcity. C) Economics helps you earn as much money as possible. D) Economics analyzes all aspects of human behavior in general. E) Economics is concerned with prices and quantities of goods and services, both at the individual level and at the industry level.
Suppose a chemical plant regularly dumps chemicals into a river that must be cleaned up before farmers located downstream can use the water on their crops
Dumping the chemicals into the river saves the chemical plant $750,000 in yearly disposal costs and cleaning the water costs farmers $825,000 each year. Explain what the benevolent social planner would like to see happen in this case.