Based on the fertility-rate calculations for major industrialized countries, their populations are expected to decline significantly in the coming years because the:
A. Total fertility rate is higher than the replacement rate
B. Total fertility rate is below the replacement rate
C. Fertility rate and the replacement rate are about equal
D. Fertility rate divided by the replacement rate is greater than one
B. Total fertility rate is below the replacement rate
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The Cost-Benefit Principle predicts that a person:
A. should take an action if its cost increases. B. is more likely to take an action if its cost increases. C. is more likely to take an action if its benefit increases. D. should take an action if its benefit increases.
Among countries that purchased U.S. stocks and bonds in 2015, China was the biggest customer, accounting for over 50 percent of all purchases
Indicate whether the statement is true or false
Using a production possibilities curve, a technological advance that increases the amount of output for both goods while using the same amount of inputs would be illustrated by which of the following?
What will be an ideal response?
Consider the following simple regression model y = 
0 + 1x1 + u. Suppose z is an instrument for x. Which of the following conditions denotes instrument relevance?
A. Cov(z,u) > 0
B. Cov(z,u) < 0
C. Cov(z,x) 
0
D. Cov(z,x z) = 0