Inflation and it’s measurements
Costs of Inflation 1
Costs of Inflation 2
Money supply
This measures the amount of money in the economy
•M0 = the level of notes and coins in circulation + banks operational balances at the Bank of England (this is known as narrow money)
•M4 = notes and coins in circulation plus private sector deposits in banks and building societies
Causes of Inflation - Monetarist Theory
Monetarists argue that if the Money Supply rises faster than the rate of growth of national income then there will be inflation.
Causes of Inflation - Monetarist Theory - Quantity theory of money (Fisher equation)
MV=PY (M = Money Supply, V = Velocity of circulation, P = Price Level, Y = National Income).
• Monetarists believe that in the short term velocity (V) is fixed
• Monetarists also believe Output (Y) is fixed by supply side factors. If there is a change in the money supply then Y will quickly return to its long run (natural) equilibrium. Note LRAS is inelastic in Monetarist model.
Therefore an increase in the Money Supply (M) faster than the growth of national income will lead to an increase in (P) inflation.
Monetarist inflation in the AD and AS model
i) Following a rise in the MS consumers have more money so spend more on goods, this shifts AD to the right.
ii) Firms respond by increasing output along SRAS, but this causes inflation to increase.
iii) Also firms need to hire more workers, so wages rise leading to an increase in costs and hence prices. Therefore, SRAS shifts to the left.
iv) As prices rise money can buy less therefore there is a movement to the left along the new AD until price level equals P2.
v) The economy has returned to the equilibrium level of output Yf, but at a higher price level P2.
Criticisms of Monetarism
Causes of inflation - Keynesian View (demand pull inflation)
demand pull inflation causes
Demand Pull inflation can be caused by many factors such as
Causes of inflation - Cost push inflation
If there is an increase in the costs of firms then firms will pass this on to consumers. There will be a shift to the left in the SRAS. Cost-push inflation can be caused by factors such as:
Evaluation of Inflation targeting 1
Evaluation of Inflation targeting 2
Falling inflation
does not mean falling prices
Calculating a weighted price index
CPI is a weighted price index. Changes in weights reflect shifts in the spending patterns of households in the British economy as measured by the Family Expenditure Survey.
Weights are attached to each category; we multiply these weights to the price index for each item of spending for a given year.
The price index for this year is: the sum of (price x weight) / sum of the weights