Inflation
A sustained rise in general price level
Deflation
A sustained fall in general price level
Price Stability
A low and stable positive rate of inflation
1-3%
Disinflation
A fall in the rate of inflation
Current country examples - (China, Turkey, UK, US)
China - 0.1% due to falling fresh food prices
Turkey - 42.12% due to Turkish Lira crash in 2018
UK - 2.5% and has been falling steadily since 2022
US - 2.9% and has constantly decreased due to falling gas prices
Consumer price index (CPI)
A measure of the average change over time in the prices paid by consumers for a representative basket of consumer goods and services
Measures the average household cost of living
Benefits of CPI
Gives a realistic indication of consumer behaviour
Provides a better picture of spending patterns in the UK
More comparable measure of inflation internationally and represents internal best practice
Limitations of CPI
Changes in quality of goods being priced
Special offers not considered
Changes in expenditure
Composition of the basket of goods - this changes so isn’t like for like
Average household doesn’t exist
Not all regions within a country experience identical price changes
Potential for sampling error
Retail price index (RPI)
The ‘headline rate of inflation’
RPI-X
Underlying rate of inflation
RPI inflation but excludes mortgage interest payments
Allows policy makers to view inflation rates without distortion of changes in house prices
RPI-Y
Inflation excluding mortgage interest payments and indirect taxes
VAT rates rarely change, but taxes on alcohol, tobacco and fuels may distort index figures
How CPI and RPI are measured
Weights - goods/services included are chosen and weighted on basis of spending patterns of UK households from the family expenditure survey
Prices - index measures price movement of 700 goods and services in 150 areas with a monthly price survey calculating 180,000 prices
Prices are multiplied by their weights to calculate RPI
Indexed - all index numbers refer to base number of 100
Differences between CPI and RPI
CPI excludes some items included in RPI-X (such as council tax, mortgage interest payments, buildings insurance)
CPI includes charges for financial services which the RPI doesn’t
CPI covers all private households, whereas RPI-X excludes the top 4% by income and pensioner households who derive 75%+ of income from state benefits
CPI includes residents of institutional households like student hostels, and foreign visitors to the UK
Producer price index (PPI)
PPI measures change in prices of goods bought / sold by UK manufacturers
Output price indices measure change in prices of goods produced by UK manufacturers
Input price indices measure change in prices of materials/fuels bought by UK manufacturers for processing and day-to-day operations
Demand pull inflation
Occurs when demand for goods and services exceeds the available supply of those goods and services in the economy
Output rises, PL rises, unemployment falls
Demand pull inflation chains of reasoning
Depreciation of exchange rate → WPIDEC → exports increase, imports decrease → AD increases so PL increases → cost push inflation due to expensive imports
Fall in interest rates → cost of borrowing decreases and less saving → C and I increase → hot money inflows decrease → AD increases so PL increases
Faster economic growth in other countries → more income per hour in other countries → increases demand for UK exports → X-M increases so AD increases so PL increases
Reduction in direct tax → lower income tax so more disposable income so increased C → lower corporation tax so more profit so increased I → Increases AD so PL increases
Cost push inflation
Occurs as a result of an increase in the unit costs of production, so prices tend to rise to protect profit margins
Output falls, PL increases, unemployment increases
Cost push inflation chains of reasoning
High global prices for components and raw materials → higher cost of production→ SRAS shifts left
Rising unit labour costs → higher cost of production →SRAS shifts left
Higher indirect taxes → higher cost of production → taxes borne by producer so SRAS shifts left and AD contracts
Inflation targeting
Public numerical target for inflation set by a central bank
e.g. BoE is 2%
Advantages of inflation targeting
Lower rate of inflation - in countries with high inflation it is a method to reduce it
More stable rate of inflation - reduced fluctuation when target is pursued and leads to more stable IR (confidence)
Anchors inflationary expectations → improved ability of economic decision makers to anticipate future rate of inflation - reduces uncertainty as public know the aim of central bank
Benefits of low inflation e.g increased international competetiveness
Disadvantages of inflation targeting
Reduced ability to pursue other objectives
Supply shocks will change inflation but demand-side monetary policy may be ineffective at dealing with this and lead to undesirable trade-offs with growth and unemployment
Reduced ability to respons to financial crises - may require expansionary MP which would lead to higher than target inflation
Short-run Phillips curve suggests trade-off with higher unemployment
Lowers consumption / fall in confidence → less profits + investment
High G to stimulate economy creates huge budget deficit
Cost of inflation to consumers
Decrease in purchasing power therefore less disposable income so lower living standards and cost of living crisis
‘Shoe leather costs’ - increased time spent by consumers working out what the correct price is for goods and services following a period of high inflation
Cost of inflation to businesses
Cost of production increases as workers demand higher wages so less demand for goods
Profits go down so firms invest less
Menu costs - firms waste time and money reprinting menus with new prices
Cost of inflation to workers
PL increases due to inflation, meaning workers demand higher wages → real income goes down so can lead to wage price spiral (worse for low-paid workers with less bargaining power so inequality increases)
Unemployment increases as cost of production for the firm increases (due to high wages demanded) so they can’t pay for the same amount of workers