Inflation | ICSE Class 10 Economics Notes

This note covers the meaning of inflation, changes in purchasing power, creeping, walking, running and hyperinflation, demand-pull and cost-push inflation, their causes and differences, negative effects on production, and effects on the distribution of income between fixed-income and business-income groups.

What is inflation and how does it change purchasing power?

Definition: Inflation is a general and continuing increase in prices. The general price level means the overall level of prices across goods and services, rather than the price of a single item.

Both parts of the definition matter. General refers to the broad movement of prices across the economy. Continuing refers to a rise that persists over time. An isolated change in one price does not, by itself, establish that inflation is taking place.

What does a general increase mean?

Prices need not move together at an identical speed. Some goods can become cheaper while others become dearer. Inflation concerns the overall trend, so a description of one product's price cannot substitute for an account of the general price level.

A price index is a statistical measure that summarises changes in the prices of a selected group of items. It helps distinguish a broad price movement from separate changes in individual prices. Its usefulness depends on selecting items that represent what is being studied.

Why does money buy less?

Purchasing power means the quantity of goods and services that money can buy. When the general price level rises, the purchasing power of a given sum falls. The amount of money may remain unchanged while its command over goods and services decreases.

This distinction separates the money amount from its value in use. Receiving the same money income, meaning income expressed in money, does not guarantee that a person can maintain the same purchases. Prices must also be considered when judging whether that person's purchasing ability has changed.

Money also serves as a store of value, meaning that it can carry purchasing ability into the future. To perform this function well, its value must be sufficiently stable. A rising price level may erode the purchasing power of money held for later spending.

Note: If inflation becomes sufficiently large, money may lose its traditional functions as a medium of exchange, something accepted in payment, and a unit of account, something used to express values. This is a conditional claim about sufficiently large inflation.

How is the rate of inflation calculated?

The Wholesale Price Index, or WPI, measures changes in the general price level at the wholesale level. To calculate its percentage increase, subtract the earlier index from the later index, divide by the earlier index and multiply by 100.

$r=\frac{X_t-X_{t-1}}{X_{t-1}}\times100$. Here, $r$ is the inflation rate in per cent, $X_t$ is the later WPI and $X_{t-1}$ is the preceding period's WPI. Both index values must use the same base.

Worked example 1. The WPI was 121.6 in 1995-96 and 127.2 in 1996-97, with 1993-94 as base 100. Calculate the percentage increase between these annual observations.

Answer: The index increase is $127.2-121.6=5.6$ index points. The percentage increase is $r=\frac{5.6}{121.6}\times100\approx4.61\%$. Thus wholesale prices rose by approximately 4.61 per cent between these observations.

What are the four stages of inflation?

The stages describe inflation according to the speed of the general price rise. Creeping, walking, running and hyperinflation move from a slow increase towards an exceptionally rapid one. They describe the pace of inflation; they do not, by themselves, explain its cause.

How do the stages differ in meaning?

Creeping inflation is still inflation. A gradual rise remains a continuing rise in the general price level, even though its pace is slow. Describing inflation as mild does not mean that the same money amount retains exactly the same purchasing power.

Walking inflation and running inflation distinguish progressively faster price increases. The words describe rates of change, rather than whether the prices of particular products are high or low. A price level and the speed at which it changes are different ideas.

What makes hyperinflation different?

Hyperinflation represents the extreme stage. Very rapid price increases severely weaken the value of money. If inflation becomes sufficiently large, money may cease to perform its usual exchange and accounting functions effectively, making the problem more serious than a gradual loss of purchasing power.

Keep the two classifications separate. A stage answers how quickly the general price level is rising. Demand-pull and cost-push inflation, discussed below, answer why upward pressure on prices develops. Naming a stage does not identify which of those mechanisms started the rise.

What causes demand-pull inflation?

Definition: Demand-pull inflation arises when total demand presses beyond the goods and services available at existing prices, pulling the general price level upwards.

Aggregate demand means total demand for final goods and services in the economy. Final goods and services are those bought for final use, rather than for further processing. Demand-pull inflation concerns the relationship between this spending demand and available output, meaning the goods and services produced.

How does excess demand develop?

1. Spending on goods and services increases, raising aggregate demand at existing prices.
2. Producers face demand beyond the output that they can make available at those prices.
3. Where resources are already highly employed, production cannot readily expand enough to meet the additional demand.
4. Demand exceeding available output under conditions of high employment may give rise to inflation.

Excess demand means demand beyond the output available at the relevant price level. At full employment, all factors of production, the resources used to produce goods and services, are fully employed. Excess demand beyond full-employment output leads to a rise in prices in the long run.

Which changes can increase spending?

Consumption expenditure is spending on goods and services for the satisfaction of wants. Higher consumption spending can increase aggregate demand. Its inflationary effect depends on whether production can expand sufficiently to meet the additional purchases being sought.

Investment expenditure is spending that adds to productive assets, resources used repeatedly in production, or stocks of goods held by businesses. Easier availability of credit, meaning borrowed funds, encourages investment. The interest rate is the cost of borrowing funds; at higher interest rates, firms tend to lower investment.

Government expenditure can also increase aggregate demand. A reduction in taxes, compulsory payments to government, can leave people with more after-tax income to spend. When firms cannot produce the higher quantities demanded at ongoing prices, prices have to rise.

These are routes through which demand can grow. The explanation needs both the source of extra spending and the limitation on output. Simply saying that people have more money leaves out the relationship between spending and the supply of goods and services.

Why is the condition about unused resources essential?

A fiscal deficit is the excess of government expenditure over receipts excluding borrowing. A high fiscal deficit need not be inflationary if there are unutilised resources and output is held back by lack of demand. Higher demand can then accompany greater output.

Note: An increase in demand does not establish inflation by itself. Preserve the condition: demand exceeding available output under high employment may give rise to inflation. When unused resources permit production to expand, the outcome can include greater output.

What causes cost-push inflation?

Definition: Cost-push inflation is a rise in the general price level originating in higher costs of production. These costs put upward pressure on the prices charged for goods and services.

Production costs are the expenses incurred in making goods and services. An input is a resource used in production, such as labour or raw materials. Raw materials are materials used to make other products. Higher input costs can make production more expensive.

Which costs can push prices upwards?

Wages are payments for labour. Wage increases can create cost pressure when they exceed improvements in labour productivity, meaning output per worker or per unit of labour time. The relevant change is the labour cost of producing a unit, not wages viewed in isolation.

Higher raw-material costs can raise production costs across businesses that use those materials. Higher fuel and power costs can also increase the expense of production and transport. If businesses pass these increased costs into their selling prices, upward price pressure spreads.

More expensive imported inputs, resources purchased from abroad for use in production, can raise domestic production costs. This is a cost-based route to inflation. The immediate cause lies in the increased expense of producing goods, rather than an initial increase in buyers' spending.

Higher indirect taxes, taxes imposed on goods and services, can raise the prices paid by buyers when the tax increase is passed on. Such tax increases can contribute to cost pressure and higher prices, although the extent of passing them on can vary.

How does the cost-push mechanism work?

1. The cost of labour, materials, energy or another production requirement rises.
2. Producing goods at existing selling prices becomes less profitable, other circumstances remaining unchanged.
3. Businesses may raise selling prices to recover higher costs; some may also reduce production.
4. If these pressures are sufficiently widespread and continuing, they contribute to a general and continuing price rise.

Profit is the amount left from sales revenue after costs have been paid. Sales revenue means the money received from selling goods or services. Higher costs reduce this remainder unless revenue changes sufficiently to offset them.

Cost-push inflation can therefore put pressure on both buyers and producers. Buyers face higher prices, while producers may face squeezed profits or reduced production. It is incorrect to assume that every increase in the selling price improves the producer's position.

Note: A wage increase alone does not prove cost-push inflation. Compare wages with productivity and examine whether higher unit costs are contributing to a general price rise.

How do demand-pull and cost-push inflation differ?

Both types involve a rise in the general price level. The difference lies in the pressure that starts the process. Demand-pull inflation begins with spending pressing against available output. Cost-push inflation begins with higher production costs putting upward pressure on selling prices.

How can the two mechanisms be compared?

What evidence identifies the cause?

For demand-pull inflation, look for evidence of increasing expenditure and insufficient additional output. If a description mentions higher government spending, the reasoning must still explain why that demand cannot be met through increased production at existing prices.

For cost-push inflation, look for evidence of higher costs and their effect on selling prices. A reference to dearer fuel or materials identifies a possible cost pressure. The explanation must connect this pressure with production costs and the wider price rise.

A statement that prices have risen identifies an outcome, not its cause. Without information about demand, costs or production conditions, the price rise alone does not establish which type of inflation is involved. Classification requires the starting mechanism to be identified.

The classification by cause is also different from classification by pace. Creeping, walking, running and hyperinflation indicate speed. Neither the word demand-pull nor the word cost-push specifies how rapidly prices are rising. Keep these two questions separate when explaining an inflationary process.

What negative effects can inflation have on production?

Production means the creation of goods and services. The harmful effects of inflation concern how businesses plan, obtain inputs and organise resources. A rise in money received from sales should not be confused with an increase in the physical quantity produced.

How can inflation disrupt productive activity?

Uncertainty about future costs and selling prices makes planning more difficult. A producer must compare expected receipts with expected expenses before expanding production. Rapid or unpredictable price changes can make this comparison less reliable and may discourage longer-term investment.

Rising input costs increase the money needed to maintain production. Working capital means funds used for day-to-day operations. When materials and other inputs become dearer, the same working capital buys fewer inputs; a business unable to obtain additional finance may have to reduce production.

Speculation means buying or holding assets mainly in the hope of gaining from price changes. Inflation can encourage people to seek gains from rising prices rather than from producing more goods. Funds and attention may move away from productive investment.

Hoarding means withholding goods from sale, often in expectation of higher prices. Withholding essential materials can interrupt supplies to producers. This creates difficulties for businesses that need a regular flow of inputs to keep production going.

Labour disputes can develop when workers seek higher wages to protect purchasing power and employers resist the increase. If disagreements lead to stoppages, production suffers. The harmful effect comes through disrupted work, rather than through a wage demand by itself.

Why are these effects connected?

These difficulties can reinforce one another. Rising costs increase the funds needed for operations, while uncertainty makes future returns harder to assess. Interruptions to input supplies or work can then make it harder to maintain the intended level of output.

The same price rise may therefore affect more than a producer's selling price. It can alter costs, access to materials, financing needs and decisions about future investment. Looking at sales receipts alone leaves out these channels through which production may be harmed.

These are possible harmful effects, not a claim that every firm immediately reduces output whenever prices rise. The result depends on the pace and predictability of inflation, the firm's costs and its ability to obtain the resources it needs.

How does inflation affect the fixed-income group?

Distribution of income concerns how income is shared among people or groups. Inflation affects distribution because prices and different incomes do not necessarily change together. A person's position depends on the movement of income relative to the cost of purchases.

The fixed-income group consists of people whose money income stays fixed over the period being considered. Salaried employees or pensioners are examples when their income does not rise with prices. A salary is a regular payment for employment; a pension is a regular payment received after retirement.

What is the difference between money and real income?

Money income, also called nominal income, is income expressed in money. Real income is the purchasing power of that income, measured in the goods and services it can buy. The distinction explains how a person can become worse off without a cut in money income.

1. The general price level rises while the person's money income remains fixed.
2. Buying an unchanged collection of goods and services now requires more money.
3. The fixed money income can buy less, so real income falls.
4. The person cannot maintain the same purchases from that income unless prices or income adjust.

The Consumer Price Index, abbreviated as CPI, measures average changes in retail prices, the prices paid by consumers. It is also called a cost of living index. A base period is the reference period for comparison, conventionally assigned an index value of 100.

How can the loss of purchasing power be shown?

Worked example 2. With 1982 as the base period at 100, the CPI in January 2005 is 526. The symbol ₹ means Indian rupees. A consumer's money wage, meaning wages expressed in money, is ₹10,000. Find its purchasing power in 1982 prices.

Answer: Real wage means the purchasing power of wages. In the formula, = means equals and × means multiplication. $\text{Real wage}=\frac{\text{Money wage}\times100}{\text{CPI}}$. Here, 100 is the base-period index.

Substituting gives $\frac{10{,}000\times100}{526}\approx1{,}901$. The real wage is approximately ₹1,901 in 1982 prices. Thus ₹10,000 in January 2005 has the purchasing power of about ₹1,901 in 1982.

If that consumer received ₹3,000 in 1982, the January 2005 income leaves the consumer worse off despite its larger money amount. Maintaining the earlier purchasing power would require ₹3,000 × 526 ÷ 100 = ₹15,780. These amounts compare purchasing ability across the stated periods.

Adjustment matters. If money income rises sufficiently to match the increase in living costs, the loss can be offset. If it remains fixed or rises less than those costs, purchasing power falls. Calling an income fixed requires specifying the period over which it does not change.

How can purchasing power and salary adjustments be calculated?

With the CPI expressed on a base of 100, the value of one current rupee in base-period rupees is $v=\frac{100}{\text{CPI}}$. Here, $v$ measures purchasing power relative to the base period.

Worked example 3. The CPI in January 2005 is 526, with 1982 as base 100. Find the purchasing power of ₹1 in January 2005 in terms of 1982 money.

Answer: Substitute the CPI into the formula: $v=\frac{100}{526}\approx0.1901$. One rupee in January 2005 therefore has the purchasing power of approximately ₹0.19, or 19 paise, in 1982.

To preserve a base-period salary's purchasing power, use $S=\frac{S_0\times\text{CPI}}{100}$. Here, $S_0$ is the base-period money salary and $S$ is the money salary required in the current period, measured over the same length of time.

Worked example 4. A person's base-year salary was ₹4,000 per annum and the current annual salary is ₹6,000. The current CPI is 400, with the base year at 100. How much must the current salary rise to maintain the base-year standard of living?

Answer: The required annual salary is $S=\frac{4{,}000\times400}{100}=16{,}000$, or ₹16,000 per annum. Subtract the current salary: $16{,}000-6{,}000=10{,}000$. The salary must therefore rise by ₹10,000 per annum to preserve the base-year purchasing power.

How does inflation affect business incomes and income distribution?

The business-income group includes people receiving profits from business activity. Unlike an income fixed in money, profit changes with sales revenue and costs. Inflation can benefit business earners when their revenue rises more than their costs, but that outcome is conditional.

When can business earners gain?

If selling prices rise while some production costs adjust more slowly, the difference between receipts and costs may widen. The business then receives a larger money profit. This explains the possible positive effect of inflation on the business-income group.

The reasoning depends on the relative movement of revenue and costs. Selling prices alone do not determine profit, because the quantity sold and expenses also matter. A business does not gain merely because one can observe a higher price on its product.

Even a larger money profit must be distinguished from greater purchasing power. Business owners also buy goods and services at changing prices. Their real income improves only if the increase in money income is sufficient relative to the increase in the cost of their purchases.

When can business earners lose?

Under cost-push pressure, inputs can become dearer before a business can raise its selling prices sufficiently. If costs rise more than sales receipts, profits fall. Difficulty obtaining materials or maintaining sales can further weaken the business's position.

Business incomes are therefore flexible, but flexibility does not guarantee protection from inflation. It permits a possible gain when receipts outpace expenses and a possible loss when expenses outpace receipts. The direction cannot be decided without considering both sides.

How can inflation redistribute purchasing power?

When business earners gain while fixed-income earners lose purchasing power, inflation changes the relative position of these groups. This can widen income inequality, meaning differences in incomes between people or groups. It does not follow that every business gains equally or that every income remains fixed.

Keep production effects separate from distribution effects. Production effects concern the making of goods and services. Distribution effects concern who gains or loses income and purchasing power. A business owner's larger profit does not, by itself, prove that the economy is producing more.

Glossary

• Inflation — A general and continuing increase in prices across the economy, reducing the purchasing power of a given money amount.
• Purchasing power — The quantity of goods and services that a given amount of money can buy.
• Creeping inflation — A slow and gradual rise in the general price level over time.
• Walking inflation — A moderate rise in the general price level, faster than creeping inflation.
• Running inflation — A rapid rise in the general price level, faster than walking inflation.
• Hyperinflation — An exceptionally rapid and uncontrolled rise in prices, with a very rapid deterioration in money's value.
• Demand-pull inflation — Inflation arising when aggregate demand presses beyond the output available at existing prices.
• Cost-push inflation — Inflation originating in increased production costs that put upward pressure on selling prices.
• Aggregate demand — The total demand for final goods and services in the economy.
• Money income — Income expressed as a money amount, without adjusting for changes in the prices of purchases.
• Real income — The purchasing power of income, measured by the goods and services that income can buy.
• Fixed-income group — People whose money income remains unchanged over the period being considered.
• Business-income group — People receiving business profits, which depend on the relationship between sales revenue and costs.
• Working capital — Funds used to meet the day-to-day operating needs of a business.
• Consumer Price Index — An index measuring average changes in retail prices, also called the cost of living index.

Common errors and misconceptions

• Misconception: A rise in any single price proves inflation. Correct: Inflation is a general and continuing increase in prices. An isolated price change does not establish the broader movement.
• Misconception: All prices must rise at exactly the same rate. Correct: Individual price movements can differ; inflation describes the general trend across prices.
• Misconception: Creeping and cost-push inflation belong to the same classification. Correct: Creeping describes the pace of inflation. Cost-push identifies a mechanism originating in higher production costs.
• Misconception: Higher demand must produce inflation. Correct: Its effect depends on available output and unused resources. Additional demand can be accompanied by greater production.
• Misconception: Any wage increase causes cost-push inflation. Correct: Wages must be considered alongside productivity, unit costs and whether cost increases contribute to a general price rise.
• Misconception: Unchanged money income means unchanged purchasing power. Correct: Rising living costs reduce the goods and services that a fixed money income can buy.
• Misconception: Every business benefits from inflation. Correct: Profits depend on revenue relative to costs. Cost increases can squeeze profits, and a money gain does not necessarily establish a real gain.
• Misconception: Rising sales receipts prove that more goods are produced. Correct: Receipts can rise because prices rise. Production concerns goods and services made, while receipts are money received from sales.

Exam-style questions with model answers

Q1. Define inflation and state its effect on the purchasing power of a fixed sum of money. [2 marks]

1. Inflation is a general and continuing increase in prices across the economy.
2. It reduces purchasing power: the same fixed sum of money can buy fewer goods and services as prices rise.

Q2. Explain creeping, walking, running and hyperinflation in increasing order of speed. [4 marks]

1. Creeping inflation is a slow and gradual rise in the general price level over time.
2. Walking inflation is a moderate general price rise, occurring faster than creeping inflation.
3. Running inflation is a rapid rise in the general price level, faster than walking inflation.
4. Hyperinflation is an exceptionally rapid and uncontrolled rise in prices, accompanied by a very rapid deterioration in the value of money.

Q3. Explain how excess demand can cause inflation, and why higher demand need not be inflationary when resources are unused. [4 marks]

1. Excess demand occurs when spending demand presses beyond the output available at existing prices, creating upward pressure on prices.
2. Under conditions of high employment, production cannot readily expand enough to meet additional demand; this may give rise to inflation.
3. Demand can increase through higher consumption, investment or government spending, so its source must be linked to the capacity to produce.
4. When unutilised resources exist and lack of demand holds back output, greater demand can accompany increased production and need not be inflationary.

Q4. Explain three production-cost increases that can contribute to cost-push inflation. [3 marks]

1. Wages rising faster than labour productivity can increase the labour cost per unit of output and create upward pressure on selling prices.
2. Higher raw-material costs increase the expense of producing goods; businesses may raise prices to recover these costs.
3. Higher fuel and power costs increase production and transport expenses. Passing these increases into prices can contribute to a wider, continuing price rise.

Q5. Distinguish demand-pull and cost-push inflation by starting point, side of the economy involved, and reason for rising prices. [3 marks]

1. Demand-pull inflation starts with demand pressing beyond available output at existing prices; cost-push inflation starts with an increase in production costs.
2. Demand-pull pressure originates on the expenditure or demand side; cost-push pressure originates on the production-cost or supply side.
3. Prices rise under demand-pull pressure because output cannot meet spending demand. Under cost-push pressure, producers seek to recover increased costs through higher selling prices.

Q6. Explain five possible negative effects of inflation on production. [5 marks]

1. Uncertainty about future selling prices and input costs makes expected returns harder to judge, which can discourage longer-term planning and productive investment.
2. Dearer inputs increase working-capital needs. Businesses unable to obtain additional operating funds may struggle to buy enough materials and maintain existing production.
3. Speculation can attract funds towards expected gains from price rises, diverting resources and attention away from investment that would support productive activity.
4. Hoarding of materials in anticipation of higher prices can interrupt the regular supplies needed by businesses, making planned production more difficult to sustain.
5. Workers may seek wage increases to protect purchasing power. Disagreements with employers can lead to work stoppages and interruptions in the production process.

Q7. Explain inflation's distribution effects on fixed-income and business-income groups. Give six points covering real income, possible business gains and possible business losses. [6 marks]

1. The fixed-income group receives an unchanged money income over the period considered, so its income does not automatically adjust when the cost of living rises.
2. Higher prices make the same purchases more expensive. Fixed money income therefore buys fewer goods and services, causing the group's real income to fall.
3. Business income depends on profits, which are the remainder after costs are paid from sales revenue; this income can change as prices and costs change.
4. If sales revenue increases more than costs, money profits rise. Business earners can therefore gain while fixed-income earners lose purchasing power.
5. If costs increase more than sales revenue, profits decline. Cost-push pressure can therefore harm business earners, so a gain is not guaranteed.
6. A larger money profit is not sufficient to prove a real gain. It must increase sufficiently relative to living costs to improve purchasing power.

Q8. In January 2005, the Consumer Price Index was 526 with 1982 as base 100. A consumer received a money wage of ₹10,000 in January 2005 and ₹3,000 in 1982. Using real wage = money wage × 100 ÷ Consumer Price Index, calculate the January 2005 wage in 1982 prices, compare purchasing power, and calculate the wage needed to preserve the 1982 purchasing power. Round the real wage to the nearest rupee. [3 marks]

1. The real wage is ₹10,000 × 100 ÷ 526, approximately ₹1,901 in 1982 prices. This expresses the later income in base-period purchasing power.
2. Since ₹1,901 is less than the earlier ₹3,000 wage, the consumer is worse off in purchasing power despite receiving a larger money wage.
3. Maintaining the earlier purchasing power requires ₹3,000 × 526 ÷ 100 = ₹15,780 in January 2005. This adjusts the earlier wage for the given rise in the price index.

Key takeaways

• Inflation is a general and continuing price rise that reduces the purchasing power of a fixed amount of money.
• Creeping, walking, running and hyperinflation classify the speed of inflation, from gradual increases to exceptionally rapid price rises.
• Demand-pull inflation involves spending demand pressing beyond available output at existing prices, particularly under conditions of high employment.
• Cost-push inflation originates in higher production costs, including unit labour, material, fuel and imported-input costs.
• Higher demand need not be inflationary when unused resources allow production to expand alongside additional spending.
• Inflation can disrupt production through uncertainty, higher operating-fund requirements, speculation, hoarding and labour disputes.
• Fixed-income earners lose real income when their money income remains unchanged while the cost of living rises.
• Business profits can rise or fall during inflation; compare revenue with costs and money income with purchasing power.

Test yourself

Which two features distinguish inflation from an isolated price increase?

Inflation is general across prices and continuing over time, rather than merely an isolated change in one price.

How are inflation's stages different from its types by cause?

Stages describe how quickly prices rise. Demand-pull and cost-push describe the mechanisms causing upward pressure on prices.

Why must an explanation of demand-pull inflation consider output?

Additional spending can be met through greater production when resources are unused. Inflationary pressure depends on demand relative to available output.

Why is productivity relevant when discussing wage-related cost-push inflation?

Wages rising faster than productivity can increase labour cost per unit. A wage increase alone does not establish this pressure.

How can inflation increase a business's working-capital requirement?

Dearer inputs require more money for day-to-day operations, so maintaining the same production can require additional operating funds.

Why can unchanged money income mean falling real income?

When living costs rise, unchanged money income buys fewer goods and services, so its purchasing power falls.

Does a higher selling price guarantee a larger business profit?

No. Profit depends on sales revenue relative to costs, so higher costs can offset or exceed increased receipts.

What distinguishes production effects from distribution effects?

Production effects concern making goods and services. Distribution effects concern changes in income and purchasing power among groups.