The value of a model is determined by
A) the usefulness of its predictions in the real world.
B) the extent of the profit earned by applying it.
C) the realism of its assumptions.
D) the model's attention to real world details.
Answer: A
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A tariff imposed by Canada on Japanese cars ________ the price of cars in Canada and ________ the quantity of Japanese cars imported into Canada.
A) raises; increases B) raises; does not change C) lowers; decreases D) raises; decreases E) lowers; increases
In the short run, why would a firm in a perfectly competitive market shut down production if the prevailing market price falls below the lowest possible average variable cost?
a. At that point (economic) profit is zero. b. Below that point average revenue becomes less than marginal revenue. c. Below that point marginal revenue becomes insufficient to pay for avoidable average variable cost. d. Below that point other firms with similar cost will find it profitable to enter the market and take away demand from the existing firms.