Assuming a constant cost industry, consumer surplus would be greater under monopoly than if the industry were perfectly competitive

When constructing economic models, economists are more concerned with

A) what people say than what they do. B) what people think than what they say. C) what people do than what they say. D) what people say than what they do or think.

People tend to eat more at all you can eat buffets than they would at any other restaurants. This is so because the cost of consuming an additional item at an all you can eat buffet is

a. negative b. zero c. positive d. None of the above