Assume a closed economy where the level of I is 300, G=T=150 and the savings function is S= −30 + 0.15Yd Where S is savings, I is investment, G is government expenditure, T is taxes and Yd is disposable income.

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Chapter18: The Keynesian Model
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Assume a closed economy where the level of I is 300, G=T=150 and the savings function is S= −30 + 0.15Yd Where S is savings, I is investment, G is government expenditure, T is taxes and Yd is disposable income.

i)  Calculate the equilibrium level of income. 


ii) What will be the increase in national income if investment reduces by 25 holding other variables constant?

iii) Suppose government reduced taxes by 100 in this economy, what would be the change in national income?

Iv) illustrate (iii) above using a well labelled diagram of the Keynesian cross.

 

The following data relate to an emerging African country.
Item                                                                    Value('000) KSHS
GNP                                                                     8,000,000 
Depreciation                                                        100,000
Indirect Business Taxes                                         80,000
Gross Investment                                                 400,000
Total population                                                   30,000
Consumption                                                       10,000
Personal Income Taxes                                          800
Excise duty                                                            80
Personal Income                                                    89,000
Net factor incomes from abroad                          200,000

Using the above data, calculate:
i) Net National Product 
ii) GNP per capita 
iii) Net investment 
iv) Disposable personal income
v) Gross domestic product 

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