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The Loanable Funds theory. We use the term “loanable funds market” to describe the arrangements and institutions by which saving of households is made available to borrowers. Factor income. Leakages must be recycled if total spending is to match full-employment GDP.

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the loanable funds theory
The Loanable Funds theory

We use the term “loanable funds market” to describe the arrangements and institutions by which saving of households is made available to borrowers.

slide2

Factor income

  • Leakages must be recycled if total spending is to match full-employment GDP.
  • According to the Classical theory, the loanable funds market acts as a conduit to transfer spending power (S) from households to borrowing units (firms and government units).
  • Saving (S) is the “source” of loanable funds.

Consumption

Net taxes

Saving

slide3

Why do households save?

?

  • To have a more secure future, to start a business, to finance a child’s education, to satisfy miserliness, . . .
  • To earn interest.

We view interest as the “reward for saving” or the “reward for postponing gratification.”

slide4

The opportunity cost of spending now (measured in lost future spending) is positively related to the interest rate.

Value of $1,000 in 3 years at alternative interest rates

slide5

Supply of Funds

Saving = Supply of Funds

Interest rate

5%

3%

0

1.5

1.75

Trillions of Dollars

slide6

Why do firms borrow?

  • To finance the acquisition of long-lived capital goods.
  • The rate of interest is the cost of borrowing or the price of loanable funds.
  • The investment demand curve indicates the level of investment spending at various interest rates.
  • As the interest rate decreases, more investment projects become attractive in the assessment of business decision-makers—hence, the investment demand function is downward-sloping with respect to the interest rate.
slide7

Demand for Funds by Business

When the interest rate falls, investment spending and the business borrowing needed to finance it rises.

Interest rate

A

5%

B

3%

Investment Demand

0

1.5

1.0

Trillions of Dollars

slide8

Public sector borrowing

  • Let G denote public sector (or government) spending for goods and services in a year
  • T is net tax receipts in a year.
  • If G is greater than T, the the public sector has a budget deficit equal to G – T.
  • If T is greater than G, then the public sector has a surplus equal to T – G.
  • If the public sector has a budget deficit, it must borrow.
slide10

Public Sector Borrowing in Classica

G = $2 trillionT = $1.25 trillionTherefore, Budget Deficit = G – T = $2 trillion - $1.25 trillion = $0.75 trillion

Government Demand for Funds

5%

B

Interest Rate

3%

A

0

0.75

Trillions of Dollars

slide12

Total Demand for Funds

Interest Rate

5%

3%

0

1.75

2.25

Trillions of Dollars

slide13

Loanable Funds Market Equilibrium

Total Supply of Funds (Saving)

Interest Rate

5%

E

Total Demand for Funds (Investment + Deficit)

0

1.75

Trillions of Dollars

why does the loanable funds theory guarantee the validity of say s law
Why does the loanable funds theory guarantee the validity of Say’s law?

S = IP + G - T

Quantity of Funds Supplied

Quantity of Funds Demanded

Now, rearrange the equation above by bringing T to the left side:

S + T = IP + G

Injections

Leakages

slide15

So long as the loanable funds market “clears,” leakages (Saving) will be offset to injections (investment and government spending).

slide16

Income ($7 Trillion)

Income ($7 Trillion)

Households

Consumption ($4 Trillion)

Saving ($1.75 Trillion)

Loanable Funds Markets

Net Taxes ($1.25 Trillion)

Government Spending ($2 Trillion)

Deficit ($0.75 Trillion

Government

Resource Markets

GoodsMarkets

Investment ($1 Trillion)

Firm Revenues ($7 Trillion)

Firms

Factor Payments ($7 Trillion)

slide17

Fiscal Policy

Changes in government spending, transfer payments, and taxes designed to change total spending in the economy and thereby influence total output and employment.

slide18

The Classical view of Fiscal policy

Friends, we believe that fiscal policy is unnecessary and ineffective. The economy is doing just fine without meddling by Washington.

slide19

Crowding Out

  • Crowding out is the idea that an increase in one component of spending will cause a decrease in other spending components.
  • An increase in G may cause a decrease in C, IP, or both—that is, government spending may “crowd out” private spending.
slide20

Crowding Out With an Initial Budget Deficit

Total Supply of Funds (Saving)

B

  • Increase in G = AH
  • Decrease in C = AC
  • Decrease in IP = CH

7%

A

C

Interest Rate

H

5%

D2 = IP + G2 - T

D1 = IP + G1 - T

0

1.75

2.05

2.25

Trillions of Dollars

slide21

Effects of a Reduction in the Government Surplus

S2 = Savings + T – G2

S1 = Savings + T – G1

Interest Rate

B

7%

H

C

A

5%

D = Investment

0

1.25

1.55

1.75

Trillions of Dollars

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