Question

Explain the reasons for the inverse relationship between the price of a commodity and the quantity demanded of it.

Answer 1

The inverse relationship between the price of a commodity and the quantity demanded of it is a fundamental principle in economics known as the Law of Demand. When the price of a good rises, its demand typically falls, and vice versa.

Key Reasons for the Inverse Relationship

1. Law of Diminishing Marginal Utility: As a consumer purchases more units of a commodity, the additional satisfaction (marginal utility) derived from each successive unit decreases. Because each extra unit is less valuable to the consumer, they are only willing to buy more if the price drops.
2. Income Effect: A change in the price of a commodity alters a consumer's real purchasing power (real income). When the price of a good falls, consumers can buy the same amount of the good while having money left over, effectively making them wealthier. This increase in purchasing power encourages higher consumption.
3. Substitution Effect: When the price of a commodity rises, it becomes relatively more expensive compared to its substitutes. Consumers naturally switch away from the higher-priced good and buy cheaper alternative goods, leading to a decrease in the quantity demanded of the original item.
4. Entry of New Consumers (Market Expansion): When the price of a commodity drops, it becomes affordable for a new group of buyers who previously could not justify purchasing it. Conversely, a price increase prices certain consumers out of the market, reducing the total quantity demanded.