You decide to donate $5 to Jerry's Kids at the grocery store checkout, and get to sign your name to a shamrock and hang it in their window. This is an example of the economic concept of:
A. selfishness.
B. marginal utility.
C. reciprocity.
D. altruism.
Answer: D
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Based on this figure, if an exchange rate of $0.09 dollars per Norwegian krone is maintained, the Norwegian government will gain (in dollar) ________ worth of international reserves per period. 
A. 495 B. 5,500 C. 220 D. 605
Which of the following is likely to be more of a problem after the introduction of deposit insurance?
A) moral hazard B) adverse selection C) contagion D) bank runs
The confidence interval for a single coefficient in a multiple regression
A) makes little sense because the population parameter is unknown. B) should not be computed because there are other coefficients present in the model. C) contains information from a large number of hypothesis tests. D) should only be calculated if the regression R2 is identical to the adjusted R2.
The manager of Greene Enterprises, Inc., recently estimated its average variable cost (AVC) function to beAVC = 88 - 0.026Q + 0.000003Q2Greene Enterprises faces total fixed costs (TFC) of $300,000. When Greene's output is 2,000 units, what is short-run marginal cost (SMC)?
A. $20 B. $90 C. $42 D. $100 E. $72