To obtain an estimator that reproduces the fixed effects estimates on the time-varying explanatory variables, _____.
A. ?one must check whether the time-demeaning allows one to interpret the estimates
B. ?one must check whether time-constant variables can be included in the fixed effects
C. ?one must be able to interpret the time variations
D. ?one must be careful in constructing the time averages
Answer: D
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If the market demand curve in a perfectly competitive industry shifts left, the demand curve for each existing firm will: a. shift up
b. shift down. c. shift right. d. shift left.
Gross domestic product is equal to the market value of all goods and services
a. exchanged during a period. b. produced domestically during a period. c. produced by the citizens of a nation during a period. d. produced domestically during a period minus the depreciation of productive assets.