--%>

Explain Tax rate increase.

A change in tax rate changes the IS equation, LM equation remaining the same. Let same, let us suppose that the government raises the tax rate from 20 percent to 25 percent. The rise in tax rate from t = 0.20 to t = 0.25 would change the IS equation by changing the consumption function with increase in tax rate, the consumption function changes form C = 100 + 100 + 0.60 Y, given in Eq. to 

C= 100 + 0.75 [Y - (40 + 0.25Y + 40)]

= 100 + 0.5625Y


With change in the consumption function, the new IS schedule (say, IS2) can be obtained as follows. 

IS2 schedule: 

Y = C + I + G + ?G

= 100 + 0.5625Y + 250 - 4i +200

= 1257.14 - 9.14i


Given the new IS function (IS2) in Eq. the new equilibrium interest rate can be worked out as follows.

Is2 = LM

1257.14 - 9.14i = 800 + 80i

89.14i = 457.14

I = 5.13 (percent)

Once interest rate is known equilibrium income with tax effect can be computed by substituting the interest rate (5.13%) into the IS2 or LM equation. By using IS2 function, we get

Y = 1257.14 - 9.14i = 1257.14 - 9.14 (5.13)

The negative effect of increase in tax rate on the equilibrium income equals income before tax - rise less income after tax-rise that is

Tax effect = $1311.10 bn - $1210.25 bn

$100.85 billion

This calculation shows that increasing tax rate form t = 0.20 to I = 0.25 decreases equilibrium income by $100.85 billion

   Related Questions in Macroeconomics

  • Q : When Macroeconomic theory least related

    Macroeconomic theory would be least related in analyzing the results of: (w) optional ways of funding deficits in international trade. (x) U.S. federal budget deficits. (y) consumer items purchased through middle-income families. (z) deficit spending through the United Nations.

  • Q : Fiscal deficits What are the causes of

    What are the causes of the fiscal deficits experienced by many developed nations in the past three years and what are the main effects of the resulting government borrowing? For example – Greece/Ireland/Portugal/Spain situation and the large def

  • Q : From the heterodox approach From the

    From the heterodox approach, what options does the enterprise have to produce more output? What impact do these options have on its cost structure?

  • Q : Full-employment Define the "

    Define the "full-employment" or "natural" rate of unemployment and give its approximate percentage rate as economists currently define it.

  • Q : Assignment for help Help me with this

    Help me with this assignment! Just 25 questions! Thank you so much!

  • Q : Problem on rational consumption

    Whenever you dine at an “all-you-can-eat” buffet, the rational consumption prototype is to carry on eating till: (1) The restaurant goes bankrupt. (2) You have eaten as much food as it would encompass cost had you made your own meal at hom

  • Q : Goals of Microeconomic Hello guys I

    Hello guys I need your advice. Please advise your view for following economics problems. Microeconomic goals consist of: (w) full employment. (x) efficient allotments of resources. (y) price level stability. (z) ec

  • Q : Transfer of wealth problem The transfer

    The transfer of wealth from developed countries to oil exporting countries (abbreviated as OPEC) which followed sky-rocketing oil prices in the year 1970s points out that the price elasticity of demand for oil was: (i) Unitary. (ii) Relatively high. (

  • Q : Opportunity costs of consumption

    Individuals maximize the satisfaction whenever the marginal utilities of all goods are: (i) Precisely proportional to the consumer’s income. (ii) Maximized. (iii) Precisely proportional to the opportunity costs of consuming them. (iv) Equivalent

  • Q : If the MPC is .70 and investment

    If the MPC is .70 and investment increases by $3 billion, the equilibrium GDP will: