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Alka Rathi
CONCEPT
The Cambridge Monetary Theory,
also known as the Cambridge Cash
Balance Approach, is an economic
theory that emphasizes the role of
money in the economy. The theory
was developed by a group of
economists at Cambridge
University in the early 20th century,
including John Maynard Keynes,
and it has been influential in
shaping modern macroeconomic
theory.
What is Cash Balance Equation ?
According to Cash Balance Equation, value of money is determined by the demand for and
supply of money. At any particular point of time, supply of money remains constant, hence
changes in demand for money have more influence on the value of money (or price-level). This
theory lays more emphasis on the demand for money than its supply. It is therefore also
referred to as Demand Theory of Money.
Supply of money = Notes + Coins + Demand Deposits
Demand of money = Cash Balances
According to this equation, if Supply of money remains constant, increase in demand for
money or cash balance will lead to fall in prices, because people will desire to hold large parts
of their income in the form of cash and so will have less demand for goods and services. And if
demand of money decreases there will be more demand for goods and services and hence
price level will rise.
ASSUMPTIONS
• Money is neutral in the long
run.
• Money is non-neutral in the
short run.
• There is a stable demand for
money.
• Money supply is endogenous
• The economy is in a state of
constant disequilibrium
Equations
Marshall's Equation:
M = KY+ K’A
(Here, M = quantity of money; Y = Monetary income; K = that part of income which people desire
to hold in cash; A = Wealth, K’ = that part of wealth which people desire to keep cash) Here Y=PO
(Monetary Income=production*price level)
Robertson’s Equation:
P=M/KT
(Here, P = price-level; M = quantity of money; T = quantity of goods and services purchased during
one year, K = that portion of T which people want to keep cash)
Keynes’s Equation:
N= P(k+rk’)
(Here, n = total quantity of money; P = price-level; k = that proportion of consumption goods which
people wish to keep cash; r = proportion of cash reserve to bank deposits; K' = that proportion of
consumption goods which people wish to keep as bank deposit.)
Equations
Pigou’s Equation:
P=KR/M
(Here, M = total quantity of money; R = total
real income; K= that portion of real income
which people wish to keep in cash; P= Value of
Money)
Modified equation
M=KR/P (c+h (1-c))
(c: cash with people; 1-c: bank deposits; h:
cash reserve ratio (held by the bank))
CRITICISMS
• The theory assumes stable demand for
money, but empirical evidence shows
that changes in technology and payment
systems can impact the demand for
money.
• The assumption that the economy is
always at full employment in the long
run has been criticized by Keynesian
economists.
• The theory does not address the issue of
income distribution and inequality.
• The theory does not account for the
impact of financial intermediaries on the
economy.
• Incomplete theory (gives importance only
to current income in determining cash
reserves)
• Ignores the effect of rate of interest
• Ignores the influence of real factors
• Fails to explain trade cycles
• The theory does not account for
the impact of international trade
and capital flows on the economy.
• The theory assumes that
investment and consumption are
solely determined by interest rates,
but other factors such as changes
in technology and regulations can
also impact investment and
consumption.
• The theory does not consider the
impact of fiscal policy on the
economy.
Cambridge Theory of Money also known as the Cambridge Cash Balance Approach

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Cambridge Theory of Money also known as the Cambridge Cash Balance Approach

  • 2. CONCEPT The Cambridge Monetary Theory, also known as the Cambridge Cash Balance Approach, is an economic theory that emphasizes the role of money in the economy. The theory was developed by a group of economists at Cambridge University in the early 20th century, including John Maynard Keynes, and it has been influential in shaping modern macroeconomic theory.
  • 3.
  • 4. What is Cash Balance Equation ? According to Cash Balance Equation, value of money is determined by the demand for and supply of money. At any particular point of time, supply of money remains constant, hence changes in demand for money have more influence on the value of money (or price-level). This theory lays more emphasis on the demand for money than its supply. It is therefore also referred to as Demand Theory of Money. Supply of money = Notes + Coins + Demand Deposits Demand of money = Cash Balances According to this equation, if Supply of money remains constant, increase in demand for money or cash balance will lead to fall in prices, because people will desire to hold large parts of their income in the form of cash and so will have less demand for goods and services. And if demand of money decreases there will be more demand for goods and services and hence price level will rise.
  • 5. ASSUMPTIONS • Money is neutral in the long run. • Money is non-neutral in the short run. • There is a stable demand for money. • Money supply is endogenous • The economy is in a state of constant disequilibrium
  • 6. Equations Marshall's Equation: M = KY+ K’A (Here, M = quantity of money; Y = Monetary income; K = that part of income which people desire to hold in cash; A = Wealth, K’ = that part of wealth which people desire to keep cash) Here Y=PO (Monetary Income=production*price level) Robertson’s Equation: P=M/KT (Here, P = price-level; M = quantity of money; T = quantity of goods and services purchased during one year, K = that portion of T which people want to keep cash) Keynes’s Equation: N= P(k+rk’) (Here, n = total quantity of money; P = price-level; k = that proportion of consumption goods which people wish to keep cash; r = proportion of cash reserve to bank deposits; K' = that proportion of consumption goods which people wish to keep as bank deposit.)
  • 7. Equations Pigou’s Equation: P=KR/M (Here, M = total quantity of money; R = total real income; K= that portion of real income which people wish to keep in cash; P= Value of Money) Modified equation M=KR/P (c+h (1-c)) (c: cash with people; 1-c: bank deposits; h: cash reserve ratio (held by the bank))
  • 8. CRITICISMS • The theory assumes stable demand for money, but empirical evidence shows that changes in technology and payment systems can impact the demand for money. • The assumption that the economy is always at full employment in the long run has been criticized by Keynesian economists. • The theory does not address the issue of income distribution and inequality. • The theory does not account for the impact of financial intermediaries on the economy.
  • 9. • Incomplete theory (gives importance only to current income in determining cash reserves) • Ignores the effect of rate of interest • Ignores the influence of real factors • Fails to explain trade cycles
  • 10. • The theory does not account for the impact of international trade and capital flows on the economy. • The theory assumes that investment and consumption are solely determined by interest rates, but other factors such as changes in technology and regulations can also impact investment and consumption. • The theory does not consider the impact of fiscal policy on the economy.