A temporary embargo on oil from the Middle East going in to the United States would
A) shift both the short-run and long-run aggregate supply curves to the left.
B) shift only the short-run aggregate supply curve to the left.
C) shift the long-run aggregate supply curve to the right.
D) shift only the long-run aggregate supply curve to the left.
B
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Which of the following must be true of a commodity for it to be used as money?
a) Its value must be easy to determine. b) It must not be divisible. c) It must not be durable. d) It must not be readily accepted by many people.
Tracy and Amy are playing a game in which Tracy has the first move at X in the decision tree shown below. Once Tracy has chosen either the top or bottom branch at X, Amy, who can see what Tracy has chosen, must choose the top or bottom branch at Y or Z. Both players know the payoffs at the end of each branch. 
In the equilibrium of this game:
A. Tracy gets 25 and Amy gets 225. B. Tracy gets 300 and Amy gets 200. C. Tracy gets 75 and Amy gets 150. D. Tracy and Amy both get 125.