
Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609
Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609 Exercise 14
Use the data in FERTIL3.RAW for this exercise.
(i) Regress gfr t on t and t 2 and save the residuals. This gives a detrended gfr t , say
,
(ii) Regress
on all of the variables in equation (10.35), including t and t 2. Compare the R-squared with that from (10.35). What do you conclude
(iii) Reestimate equation (10.35) but add t3 to the equation. Is this additional term statistically significant
(i) Regress gfr t on t and t 2 and save the residuals. This gives a detrended gfr t , say

(ii) Regress

(iii) Reestimate equation (10.35) but add t3 to the equation. Is this additional term statistically significant
Explanation
(i)
On regressing the variable on
and ...
Introductory Econometrics 4th Edition by Jeffrey Wooldridge
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