--%>
Assignment Help - homework help

Explain Product Market Equilibrium.

To begin with, let us recall our three-sector product-market equilibrium model given as 

C + I + G = C + S + T

To this three-sector model, we now add the foreign trade-the exports (X) and imports (M). with the addition of X and M, the four-sector product-market equilibrium condition is written as 

C + I + G + (X - M) = C + S + T 

The variables X and M need some explanation and quantification exports (X) of a country depend on a variety of factors governing the foreign demand for its goods and services. The inclusion of foreign demand parameters in the domestic model of a country is neither an easy task nor a necessity for a simplified model. Therefore, X is assumed to be a constant factor, that is,

X = X

As regards imports, imports (m) of a country are a function of a number of factors, however, for the sake of analytical simplicity; imports are treated as the function the country's national income(Y). That is import function takes the following form

M = + mY

Where, M is autonomous import and m is marginal propensity to import, the proportion of marginal national income spent on imports.

With X and M defined, the four- sector product-market equilibrium condition given in can be rewritten as 

C+ I + G + X - M - mY = Y = C + S + T 

The product-market equilibrium condition can also be expressed as 

Y = C + I + G + X - M - mY

Where C = a + by d( where Yd = Y - T = disposable income)

S = - a + (I - B) y (where I - B = mps)

I = I - Hi (where h > 0) 

G = G, (where G is constant)

T =T + t y, (where T is constant tax and t is tax rate <1)

By substituting the equilibrium level of income can be expressed as

Y = a + b [Y - (T + t Y)] + I - hi + G +X - M - my

=a + by - b t - bty + I - hi + G + X - M - my 

Y = 1 / 1-b+ bt + m (a - b T + I - hi + G + X - M

Y = 1 / 1 - b (1 - t) +m (a - b T + I - hi + G + X - m 

Note that the term 1/ (1 - b + bt + m) is tax-trade multiplier which may be redesignated as mu. Also let us designate the sum of the five constants, viz a, i. G, X, and M as A. by substitution these value 

Y = mu (a - b T - hi)

(Where mu is tax-trade multiplier and A = a + I + G + X - M)

Equation  gives the aggregate demand (AD) function in a four-sector model. 

   Related Questions in Macroeconomics

  • 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 : Economic growth model Explain the main

    Explain the main features of Harrod - Domar Growth model. How does the Harrod Domar model explain the occurrence of trade cycles?

    		•
  • Q : What is Equilibrium quantity

    Equilibrium quantity: It is the quantity supplied and the quantity demanded at equilibrium price.

    		•
  • Q : Transactions demand for money The basic

    The basic determinant of the transactions demand for money is the

    		•
  • Q : List Which of the following lists

    Which of the following lists includes only capital resources (and ther Which of the following lists includes only capital resources (and therefore no labor or land resources)?

    		•
  • Q : Liability of tax problem If the

    If the liability to give a tax is on one person and the burden of tax fall on some other person, state the kind of tax? Answer: These are indirect taxes like sales

    		•
  • Q : The Fed can control the Fed funds rate

    Question: Hubbard argues that the Fed can control the Fed funds rate, but the interest rate that is important for the economy is a longer-term real rate of interest.   How much control does the Fed have o

    		•
  • Q : Meaning of SWOT Analysis SWOT Analysis

    SWOT Analysis: SWOT analysis is a powerful tool to know the strengths, weaknesses, opportunities and threats for any company. The company itself does SWOT analysis so as to know where they are standing vis-a-vis their competitors and what are the area

    		•
  • Q : Microeconomics is studying economic

    is studying economic worth your time and effort

    		•
  • Q : Subjective worth of Consumer Surplus

    The consumer gains from being capable to purchase at a single price rather than paying all that the particular quantity of the good is subjectively worth are: (i) Adverse selections. (ii) Market exploitation. (iii) Consumer surpluses. (iv) Moral hazards.