Which of the following statements is true?
A) Optimization in levels is based on behavioral analysis.
B) Optimization in differences is based on marginal analysis.
C) Optimization in differences is often faster than optimization in levels, as it considers all aspects of the feasible alternatives.
D) Optimization in levels is often slower to implement than optimization in differences, as it considers only the aspects in which alternatives differ.
B
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A free rider is a person who ________
A) can produce a good at a very low cost B) only consumes products provided by the government C) receives the benefit of a good without paying for it D) purchases products available for discounts
Which of the following would be the best example of a near public good?
a. a candy bar b. a painting by Monet c. a taxi cab d. a beautiful sunset e. a national park
According to studies using international data, an increase in the saving rate
a. does not increase the growth rate of output. b. increases the growth rate of output for a few years. c. increases the growth rate of output for about a decade. d. increases the growth rate of output for several decades.
Suppose the figure below shows Luke's demand curve for check-ups along with the supply curve for check-ups. 
What is the marginal cost of one extra check-up?
A. $100 B. $150 C. $200 D. $50