The Price Puzzle : What Drives the Market — NCERT Solutions

The demand for goods and services is influenced by price, income of the consumer, prices of related goods (substitutes and complements), taste and preference, population size and composition, seasonality, future price expectations, and diminishing marginal utility. Demand also depends on purchasing power, meaning people must be willing and able to buy.

The supply of goods and services is influenced by price, prices of related goods, number of sellers in the market, technology, future expectations, and changes in weather, input costs, availability of resources, and other disruptions. In general, higher prices raise supply and lower prices reduce it.

Prices are determined by the interaction of demand and supply. If demand is higher than supply, sellers can charge more, so prices rise. If supply is higher than demand, sellers reduce prices to sell more, so prices fall. When quantity demanded equals quantity supplied, the market reaches equilibrium, and the price becomes stable. So the market price adjusts until demand and supply balance each other.

Market equilibrium is the point where the quantity demanded equals the quantity supplied. At this point, there is neither excess demand nor excess supply, so the market is cleared and prices tend to remain stable.

In the real world, equilibrium does not stay fixed because markets are dynamic. Changes in technology, wages, weather, wars, pandemics, and other events keep shifting demand and supply. So markets are always moving toward a new equilibrium rather than remaining permanently at one point.

The government intervenes in the market to make it fairer and more efficient. It does this because markets may fail to provide essential goods at affordable prices, may allow monopolies, or may involve unfair practices like hoarding and black-marketing.

Government intervention includes:

• Price ceiling on essential goods to prevent overcharging.
• Price floor such as minimum wages to protect workers.
• Regulation of monopolies and unfair trade practices.
• Provision of public goods like roads, parks, streetlights, defence, sanitation, and drainage.

It intervenes to protect consumers, workers, producers, and especially vulnerable and low-income groups, and to promote social welfare.

Changes in input costs, alternate inputs, resource depletion, weather, or disasters affect supply directly.

• If the cost of inputs rises, production becomes costlier, so supply falls.
• If a cheaper alternate input is discovered, production becomes easier or cheaper, so supply rises.
• If resources are depleted, producers cannot make as much, so supply falls.
• If weather is favourable, supply of farm products rises; if weather is bad or there is a disaster, supply falls.

For example, drought can reduce the supply of crops, while better irrigation or a new technology can increase supply.

Two goods or services provided by the government are, for example, roads and streetlights.

If we choose roads:

• Who benefits? Everyone in the area benefits: pedestrians, cyclists, motorists, public transport users, businesses, and emergency services.
• Why is it difficult for a private company to provide it alone? Roads are public goods. Many people use them, and it is difficult to charge each person separately in a fair way. Private companies may also not earn enough direct profit.
• If the government stops providing it: People may face poor connectivity, slower transport, higher costs, accidents, and difficulty reaching schools, hospitals, and markets.

This happens because of diminishing marginal utility. The first mango gives the greatest satisfaction, but each additional mango gives less extra utility than the previous one. As the usefulness from more mangoes falls, the willingness to pay also falls, so demand decreases after a point.

One example is petrol prices, which often change frequently.

Prices keep changing because of changes in demand and supply, international oil prices, taxes, transport costs, and market expectations. When demand rises or supply falls, the price increases; when demand falls or supply rises, the price decreases.

Yes. For example, the government fixes minimum wages for workers.

This is done so that workers receive at least a fair income for their labour. It protects them from exploitation and ensures a basic standard of living. Similarly, the government may fix prices of medicines or bus fares to protect consumers from overcharging.

From Table 9.3:

• At ₹40, Qd = 38 kg and Qs = 6 kg.
• Since Qd > Qs, there is excess demand of $38 - 6 = 32$ kg.
• At ₹100, Qd = 12 kg and Qs = 12 kg.
• Since Qd = Qs, this is market equilibrium.
• At ₹150, Qd = 8 kg and Qs = 43 kg.
• Since Qs > Qd, there is excess supply of $43 - 8 = 35$ kg.

On the graph, plot demand points $(40,38)$, $(100,12)$, $(150,8)$ and supply points $(40,6)$, $(100,12)$, $(150,43)$.

• The gap between demand and supply at ₹40 shows shortage, which pushes price upward.
• The gap at ₹150 shows surplus, which pushes price downward.
• The market moves toward equilibrium at ₹100 where demand and supply are equal.

A democratic government should intervene when markets fail to protect welfare, especially when essential goods become unaffordable, when there is monopoly power, or when unfair practices like hoarding and black-marketing occur. It should intervene only as much as needed, so that people are protected without creating unnecessary restrictions.

It should balance consumer welfare, producer incentives, and social equity. The goal should be to correct market failure, not to control every market decision.

A democratic government should consider the voices of consumers, producers, workers, and other affected groups.

• Consumers can explain affordability and access issues.
• Producers can explain costs, output, and incentives.
• Workers can explain wages and working conditions.
• Other groups, such as small businesses and vulnerable communities, may also be affected.

A democratic government should consider all these voices because market policies affect different people in different ways, and fairness requires balancing these interests.

The statement is not always true. An increase in income does not always lead to a rise in demand for all goods.

It is true for many goods because higher income allows people to buy more or better-quality products. But the demand for some goods may not rise much, and for inferior goods it may even fall when income increases, because people may switch to better alternatives.

So, higher income generally increases demand for several goods, but not for every good in the same way.

The chapter explains that when the price of a substitute good rises, the demand for the other related good rises, and when the price of a complementary good rises, demand for the related good falls.

So if petrol prices double:

• Demand for diesel cars: likely increases because people may shift to a cheaper alternative to petrol cars.
• Demand for electric cars: likely increases because people look for substitutes for petrol-based transport.
• Demand for car accessories: likely falls if fewer people buy or use petrol cars, since accessories are linked to car use.
• Demand for public transport: likely increases because people may choose it as a cheaper alternative.

The drip irrigation technology upgrade will:

a. Cost of production

It will reduce the cost of production because it uses less water and makes farming more efficient.

b. Willingness to supply at different prices

The farmer will be willing to supply more at each price because production is cheaper and yield is higher, so profit rises.

c. Overall market supply if many farmers adopt it

If many farmers adopt drip irrigation, market supply will increase. The chapter says improved technology reduces production cost and allows producers to supply more.

During festival sales, sellers often reduce prices because they expect high demand from many buyers. In some cases, they also want to clear stock quickly, so they accept lower prices to increase sales volume.

When the price is lowered, the quantity demanded rises. If the price goes below the equilibrium price, there may be excess demand if supply cannot match the higher demand immediately. Sellers may still benefit because lower prices can attract more buyers, help them sell more units, reduce unsold stock, and increase total revenue through higher sales volume. So it can benefit both consumers and sellers.

If the government sets a maximum sale price below the market price, suppliers are likely to supply less because the price is too low for them. Demand will be higher than supply, so the result is a shortage.

So the correct option is b. Shortage.

Other goods where price controls are set include essential medicines, bus fares in some places, minimum wages for workers, and some essential commodities during emergencies.

The reasons are:

• to make essential goods and services affordable,
• to protect consumers from overcharging,
• to ensure workers receive a fair income,
• and to prevent exploitation during shortages or emergencies.

Yes, excessive government regulation can hurt markets.

The chapter gives three main problems:

• Price distortions and reduced producer incentives: if prices are fixed too low, producers may produce less, causing shortages.
• Compliance burdens: too many licenses, permits, and rules increase time and cost, especially for small businesses.
• Discourages innovation and entrepreneurship: heavy regulation reduces the incentive to invest in new ideas or better technology.

For example, if farmers cannot earn enough because of low price controls, they may not invest in better seeds or irrigation. So regulation is useful, but too much of it can harm production and business growth.