--%>

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 : Control of Inflation Economists agree

    Economists agree that inflation beyond a moderate rate is undesirable as it can often prove disastrous and therefore, it must be kept under control. Economists agree also that an appropriate mix of fiscal and monetary policies can be helpful in controlling inflation.

  • Q : Problem on superior or luxury goods The

    The Income effects will be most strongly positive for: (1) Normal goods. (2) Necessities. (3) Superior or luxury goods. (4) Substitutes and much negative for the complements. Find out the right answer from the above options.

  • Q : Perfectly substitutable outcome Firms

    Firms which serve customers who vision the firm’s output as perfectly substitutable for the outcomes of huge numbers of other firms confront: (i) Horizontal (that is, perfectly price elastic) demand curves. (ii) Predatory pricing from greater mo

  • Q : Equilibrium The equilibrium interest

    The equilibrium interest rate is determined

  • 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 : Problem on equivalent Consumer Surplus

    Tom reimburses $5.00 for a ticket to see a present hit movie. If Tom was willing to reimburse up to $7.00 for that ticket, his consumer surplus equals: (1) $5.00 (2) $2.00 (3) $7.00 (4) Tom does not receive any consumer surplus as he purchased the ticket.

  • Q : How banking evolved into the

    Give a short history of how banking evolved into the sophisticated operation. Start first with the Goldsmith and sum up with the Banking system which we experience nowadays.

  • Q : Explain Shut Down Price Explain the

    Explain the term Shut Down Price? Illustrate it.

  • Q : Define the term Supply curve Define the

    Define the term Supply curve.

  • Q : Creation of assets or reduction of

    Illustrate which budget expenses does not result in the creation of assets or reduction of liability. Give illustrations too.