(a) Using the data in Problem 7.1 (page 273), estimate a multiple regression model of the birth rate

(a) Using the data in Problem 7.1 (page 273), estimate a
multiple regression model of the birth rate explained by GNP, the growth rate
and the income ratio. Comment upon:

(i) the sizes and signs of the coefficients;

 (ii) the significance of the coefficients;

(iii) the overall significance of the regression. (b) How
would you simplify the model?

 (c) Test for the joint significance of the coefficients on
growth and the income ratio.

(d) Repeat the above steps for all 26 observations. Comment.

(e) Do you feel your understanding of the birth rate is
improved after
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(a) Using the data in Problem 7.1 (page 273), estimate a
multiple regression model of the birth rate explained by GNP, the growth rate
and the income ratio. Comment upon:

(i) the sizes and signs of the coefficients;

 (ii) the significance of the coefficients;

(iii) the overall significance of the regression. (b) How
would you simplify the model?

 (c) Test for the joint significance of the coefficients on
growth and the income ratio.

(d) Repeat the above steps for all 26 observations. Comment.

(e) Do you feel your understanding of the birth rate is
improved after estimating the multiple regression equation?

(f) What other possible explanatory variables do you think
it might be worth investigating?

Problem 7.1

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