The current empirical evidence indicates that
a. changes in the earth's cloud cover will clearly enhance the warming effects of carbon dioxide.
b. the increase in carbon dioxide, over thousands of years, is definitely the cause of global warming.
c. if global warming continues as most models predict, then in the next 100 years the sea levels clearly will rise by more than 10 feet.
d. none of the above is true.
D
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Improvements in information technology over the past decade have enhanced labor productivity. What has been a likely result of this change?
A) Unemployment has increased. B) Entrepreneurs no longer have an incentive to invest in information technology. C) Capital productivity has declined. D) The rate of economic growth has increased.
Suppose Tinsel Town Videos lowers the price of its movie club membership by 10 percent and as a result, CineArts Videos experienced a 16 percent decline in its movie club membership
What is the value of the cross-price elasticity between the two movie club memberships? A) -1.6 B) -0.625 C) 0.625 D) 1.6