Question: Table 9-8 (found on the textbook's Web site) gives data on salary and related data on 447 executives of Fortune 500 companies. Salary = 1999

Table 9-8 (found on the textbook's Web site) gives data on salary and related data on 447 executives of Fortune 500 companies. Salary = 1999 salary and bonuses; tot-comp = 1999 CEO total compensation; tenure = number of years as CEO (0 if less than 6 months); age = age of CEO; sales = total 1998 sales revenue of the firm; profits = 1998 profits for the firm; and assets = total assets of the firm in 1998.
a. Estimate the following regression from these data and obtain the Breusch-Pagan statistic to check for heteroscedasticity:
Salaryi = B1 + B2tenurei + B3agei + B4salesi + B5profitsi + B6pssetsi + ui
Does there seem to be a problem with heteroscedasticity?
b. Now create a second model using In(Salary) as the dependent variable. Is there any improvement in the heteroscedasticity?
c. Create scatter grams of Salary versus each of the independent variables. Can you discern which variable(s) is (are) contributing to the issue? What suggestions would you make now to address this? What is your final model?
d. Now obtain (White's) robust standard errors. Are there any noticeable differences?

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aRegression results from EViews are as follows Dependent Variable SALARY Sample 1 447 Included observations 447 Variable C Coefficient 9987095 Std Err... View full answer

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