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Elasticity of demand and supply

Nikiforov Alexander
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Introduction to Demand and Supply Elasticity

Demand and supply elasticity is an important economic concept that demonstrates how changes in price and other factors affect the volume of demand and supply of goods in the market. This metric allows businesses and economists to better understand market mechanisms and adapt to changing conditions. Elasticity can be either high or low. Demand is considered elastic if its volume changes significantly in response to price fluctuations. For example, if the price of cars rises sharply, the number of sales may drop considerably. In contrast, inelastic demand remains stable even with significant price changes, as seen with staple goods like salt.

Types of Elasticity

Price Elasticity

Price elasticity shows how much the volume of demand or supply will change with a 1% change in price. For example, if the price of meat increases by 10% and the volume of sales decreases by 15%, then the elasticity of demand will be 1.5. When the coefficient is greater than 1, it indicates elastic demand, while if it is less than 1, it indicates inelasticity. Businesses can use this data to optimize pricing strategies and increase profits.

Income Elasticity

Income elasticity demonstrates how the demand for goods changes based on changes in consumer income. For example, if incomes rise, this may lead to an increase in demand for luxury goods while simultaneously decreasing interest in low-quality products. Income elasticity can be negative, meaning that as incomes increase, consumers may forgo cheaper goods.

Cross Elasticity

Cross elasticity analyzes how the price change of one good affects the demand for another good. For example, if the price of butter increases, it may lead to an increase in demand for margarine, as these two goods are substitutes. Thus, cross elasticity helps companies understand how changes in one market can impact other markets.

How to Calculate Elasticity

To calculate the elasticity coefficient, you need to know the percentage change in demand and the percentage change in price. For example, if the demand for a product decreased from 1000 units to 800, the change in demand would be 20%. If the price of the product increased from 50 to 75, the change in price would be 50%. Elasticity is calculated using the formula:

Elasticity = Change in Demand (%) / Change in Price (%)

In our example, this would be 20% / 50% = 0.4, indicating inelastic demand.

Factors Affecting Supply Elasticity

Supply elasticity shows how quickly producers can respond to price changes. The main factors influencing supply elasticity include:

  • Availability of resources: If resources are limited, producers will not be able to quickly increase production.
  • Shelf life: The duration of a product's shelf life also impacts its elasticity. Products with a short shelf life, like flowers, have greater elasticity.
  • Expectations regarding price trends: If producers do not anticipate rising prices, they may not change production volumes.
  • Production duration: The production process for goods that require long timelines, such as construction, also limits supply elasticity.

Thus, demand and supply elasticity are dynamic indicators that allow businesses to adapt to market changes and make strategic decisions based on data.