The sample average of the OLS residuals is
A) some positive number since OLS uses squares.
B) zero.
C) unobservable since the population regression function is unknown.
D) dependent on whether the explanatory variable is mostly positive or negative.
Answer: B
Economics
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Which of the following would cause an increase in the supply of cheese?
A) an increase the price of a product that producers sell instead of cheese B) an increase in the price of cheese C) a decrease in the price of wine (assuming that cheese and wine are complements) D) an increase in the number of firms that produce cheese
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What accounts for differences in living standards between rich and poor countries today?
What will be an ideal response?
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