Joey cuts lawns during the summer. Let q equal the number of acres mowed per day, and let L equal the number of hours worked per day. Joey never works more than eight hours per day, and during that ti
A. Joey’s marginal productivity equals his average productivity
B. Joey’s marginal productivity diminishes by 0.2 for each additional hour worked
C. Joey’s average productivity is constant
D. Joey’s marginal productivity is constant
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Robinson Crusoe is stranded on an island. He finds that coconuts are freely available （zero harvest cost）, but fish are difficult to harvest and require a lot of energy. As a result, harvesting fish h
A. He will consume more coconuts than fish
B. He will consume more fish than coconuts
C. He will consume equal amounts of both goods
D. Not enough information is given
With respect to production, the short run is best defined as a time period（）
A. lasting about six months
B. lasting about two years
C. in which all inputs are fixed
D. in which at least one input is fixed
One reason more sport utility vehicles （SUVs） are driven in the United States than in Europe is（）
A. different marginal rates of substitution
B. different marginal rates of transformation
C. the United States hasn’t had a recession since 2000-2001
D. Either A or B
Data shows that United States college students purchase more e-books than German college students. Assuming that all students have identical preferences for e-books and textbooks, what is the likely e
A. Taxes on textbooks are higher in the United States than taxes on textbooks in Germany
B. Taxes on textbooks are lower in the United States than taxes on textbooks in Germany
C. The price of textbooks is cheaper in the United States than textbooks in Germany
D. Both A and C
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