# (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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