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Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609Introductory Econometrics 4th Edition by Jeffrey Wooldridge
Edition 4ISBN: 978-0324660609 Exercise 14
Use the data in FERTIL1.RAW for this exercise.
(i) In the equation estimated in Example 13.1, test whether living environment at age 16 has an effect on fertility. (The base group is large city.) Report the value of the F statistic and the p-value.
(ii) Test whether region of the country at age 16 (South is the base group) has an effect on fertility.
(iii) Let u be the error term in the population equation. Suppose you think that the variance of u changes over time (but not with educ, age, and so on). A model that captures this is
Using this model, test for heteroskedasticity in u. (Hint: Your F test should have 6 and 1,122 degrees of freedom.)
(iv) Add the interaction terms y74-educ, y76-educ, y84-educ to the model estimated in Table. Explain what these terms represent. Are they jointly significant
Table
(i) In the equation estimated in Example 13.1, test whether living environment at age 16 has an effect on fertility. (The base group is large city.) Report the value of the F statistic and the p-value.
(ii) Test whether region of the country at age 16 (South is the base group) has an effect on fertility.
(iii) Let u be the error term in the population equation. Suppose you think that the variance of u changes over time (but not with educ, age, and so on). A model that captures this is
Using this model, test for heteroskedasticity in u. (Hint: Your F test should have 6 and 1,122 degrees of freedom.)
(iv) Add the interaction terms y74-educ, y76-educ, y84-educ to the model estimated in Table. Explain what these terms represent. Are they jointly significant
Table
Explanation
Verified
Verified
(i)
Estimate the OLS multiple regression...
Introductory Econometrics 4th Edition by Jeffrey Wooldridge
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