Based on your understanding of your roommate's preferences, you predict that he will select the spaghetti for his lunch at the cafeteria, but instead he chooses the gyros. How do you describe this event in terms of economic theory?
A) Your roommate is irrational.
B) Your roommate does not know what is in his own best interests.
C) You roommate does not know his own preferences as well as you do.
D) You constructed a model that made a prediction, and the prediction was refuted.
D
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A fall in the price of pesticide use in the production of cotton will
A) decrease the supply of cotton, causing the supply curve of cotton to shift to the left. B) increase the supply of cotton, causing the supply curve of cotton to shift to the left. C) cause a downward movement along the supply curve of cotton. D) have no effect on the supply of cotton. E) None of the above
Tara deposits money into an account with a nominal interest rate of 6 percent. She expects inflation to be 2 percent. Her tax rate is 20 percent. Tara's after-tax real rate of interest
a. will be 2.8 percent if inflation turns out to be 2 percent; it will be higher if inflation turns out to be higher than 2 percent. b. will be 2.8 percent if inflation turns out to be 2 percent; it will be lower if inflation turns out to be higher than 2 percent. c. will be 3.2 percent if inflation turns out to be 2 percent; it will be higher if inflation turns out to be higher than 2 percent. d. will be 3.2 percent if inflation turns out to be 2 percent; it will be lower if inflation turns out to be higher than 2 percent.