Inflation refers to a general continuous increase in prices and fall in the purchasing value of money. When the general price level rises, each unit of currency buys fewer goods and services. Consequently, inflation reflects a reduction in the purchasing power per unit of money – a loss of real value in the medium of exchange and unit of account within the economy.
The opposite of inflation is deflation, a sustained decrease in the general price level of goods and services. Deflation occurs when the inflation rate falls below 0%. A small inflation rate, or one that is undergoing minor fluctuations, is considered by many economists to be optimal for an economy’s performance. When inflation is low and stable, it represents reasonable gains in purchasing power for holders of money, and a reasonable cost of borrowing for those who need to borrow. When inflation escalates rapidly into hyperinflation, savers lose most or all of their purchasing power, and the economy often collapses.
Factors Influencing Inflation: There are several causes which may lead to inflationary pressures within an economy:
Demand-pull inflation: When aggregate demand (spending throughout the economy) outpaces aggregate supply (available goods and services), inflation emerges. This is called demand-pull inflation. Rising consumer demand, a growing economy, or government spending can boost overall demand and trigger higher consumer prices as businesses raise prices to deal with shortages and maintain profit margins.
Cost-push inflation: Rising production costs, such as increases in wages, import prices, and commodity prices, can work their way through into consumer prices. For example, sharp increases in oil prices can lead to widespread cost increases that get passed on to consumers in the form of higher prices. Cost-push inflation occurs when suppliers face higher costs of production and pass those increased costs on to consumers in the form of increased prices.
Loose monetary policy: When a central bank increases the money supply growth rate too quickly over a sustained period, it can potentially weaken purchasing power and lead to demand-pull inflation. Excessively high money growth means more money is chasing a given number of goods, which results in rising prices.
High inflation expectations: If the general public comes to expect higher inflation, they will demand wage increases to compensate for the loss of purchasing power. When production costs rise due to higher wages, firms will raise their own prices. This cycle of higher inflation feeding higher inflation expectations is one of the most difficult forces for a central bank to counteract. It requires lower inflation and credible policy commitment to break the cycle.
Government policies & regulations: Certain macroeconomic policies and regulations pursued by governments can indirectly lead to inflation. This includes expansionary fiscal policies such as large budget deficits, direct price controls or wage and price freezes, currency devaluations, and import tariffs.
Supply shocks: Temporary reductions in aggregate supply due to adverse weather conditions, wars, oil price shocks and other events can cause short-term inflation if production is disrupted while demand remains strong. Some examples are the oil shocks of the 1970s, crop failures due to drought or flooding, or lockdowns during the COVID-19 pandemic. Supply shocks generally have only transitory impacts on inflation.
Measuring Inflation: Economists primarily use price indices to measure and track inflation in an economy over time. Here are some commonly used price indices:
Consumer Price Index (CPI): Measures prices paid by consumers for a fixed basket of goods and services. It is used to determine the rate of inflation faced by urban consumers in procuring their living expenses. The CPI is generally reported as an annualized percentage change.
Gross Domestic Product deflator: Measures prices of all domestically produced final goods and services in an economy. It provides a broad measure of inflation.
Producer Price Index (PPI): Measures changes in selling prices received by domestic producers for their output. It offers insight into future consumer inflation by gauging upstream price changes.
Import/Export Price Index: Tracks changes in prices of non-military goods and services traded internationally. It provides insight into imported and export inflation pressures.
Core inflation measures: Strip away volatile food and energy prices to gauge underlying trend in inflation. Core inflation reflects broad, persistent price pressures in the economy.
Tackling High Inflation: Central banks are tasked with maintaining stable and low inflation levels via their conduct of monetary policy. When inflation accelerates persistently above target, central banks typically respond by tightening policy to slow economic growth and inflationary pressures. Specifically, central banks raise interest rates to:
Cool demand by making borrowing more expensive. Less money circulating means less competition for goods, allowing prices to stabilize.
Strengthen currency value by raising rates relative to foreign nations. A stronger currency imports lower inflation via imports.
Reset inflation expectations as the public comes to expect lower future inflation. This helps untangle the wage-price spiral.
Curb credit creation by commercial banks as higher rates make lending less appealing. Less liquidity means less bidding up of asset prices.
Apart from rate hikes, central banks can also reduce liquidity by raising reserve requirements, conduct open market sales to withdraw money from circulation, and engage in hawkish rhetoric to anchor inflation expectations. Fiscal policy tightening by governments through tax hikes or spending cuts may also help slow the pace of inflation. Inflation targeting by central banks focuses on achieving and maintaining price stability.
This article comprehensively covered the concepts of inflation and deflation, causes of inflation like demand-pull and cost-push factors, methods of measuring inflation through various price indices, and the monetary policy tools central banks deploy to combat unacceptably high inflation. The information provided here can form the basis for research on inflation or be adapted to create an academic paper on the topic.
Andrew Stroud