Demand and Supply: How Prices Are Determined in Markets

Demand and supply are two key principles that make up the backbone of economics. The demand for a product and the quantity of the product supplied to consumers willing to buy, are all dependent on the price of the product. Why do prices rise, fall, or remain stable? The answer lies in the interaction of demand and supply, which determines how markets respond to changes in consumer behaviour and production conditions.

Demand is the want and willingess of consumers to buy a product at a given price. Consumers decide whether to buy a product or not, depending on the price of the product. If one has the opportunity to purchase the same book at a price of $5 or at a price of $8, he will chose to spend his money on the book that costs $5 due to the price being cheaper and being more appealing. However, the behaviour of humans towards changes in price are not certain and hence, only a prediction of human behaviour in economics can be made. The law of demand states that the quantity demanded is always inversely proportional to the price, hence, when price rises, demand drops and vice versa. Producers study trends in what consumers find more appealing and make changes in the quantity supplied as well as the price they set for the products. For example, if the demand for a certain car is higher compared to others, producers will increase the price for that car in hopes of earning more revenue. However, this can backfire as if the car is not a necessity, consumer demand can drop significantly causing loss in profit and revenue for the producer. This is called price elasticity of demand, which is the relative responsiveness of consumer demand to changes in the price of a product.

When the PED is inelastic, it means that the good is a necessity and hence, a rise in price would cause a drastic rise in revenue. For example, the quantity demanded for train tickets in the mornings are significantly higher than in the afternoon due to people having to go to work, hence it is considered a necessity for people so it is an inelastic service. If sellers were to increase the price of train tickets, they would earn more revenue as people would be willing to pay despite the increase in price as they need to get to work regardless.

On the other hand, when PED is elastic, it means that the good is a luxury, hence an increase in price will most likely cause a decrease in demand as people will forego the usage of the good when the price goes up as it is not a necessity. However, a decrease in price of the good will lead to a increase in demand and revenue as a lesser price for a luxury good will attract more people to buy it causing increasing revenue and profits.

Supply is the want and willingess of producers to produce a certain product at a given price. For example, if a producer of chocolates realise that the demand for the chocolates is more, they will increase the price of chocolates as they would like to earn more revenue. However, if they realise that the demand for chocolates is less, they will reduce the price so that it will attract more demand and hence match up to their expected revenue. This is the law of supply, which states that price and supply have a directly proportional relationship.

In conclusion, prices in a market are shaped by the constant interaction between demand and supply. How much consumers are willing to buy and how much producers are willing to sell, combined with how responsive demand is to price changes, determines whether prices rise, fall or stay the same. Understanding these core ideas helps explain everyday market behaviour and shows why demand and supply remain at the heart of economics.