The appropriate time average of {yit} is? , whereTiis:

A. ?the dummy variable, which equals one when a complete set of data is observed.
B. the total number of time periods for cross-sectional observation i.?
C. ?the total number of complete time periods for cross-sectional observation i.
D. ?the explanatory variable for cross-sectional observation i.


Answer: C

Economics

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c. benefit Regan, but not Jayson. 

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