Price elasticity of supply refers to the responsiveness of the quantity supplied of a good or service to changes in its price. This economic concept plays a vital role in understanding market dynamics and making informed business decisions. In this article, we will explain how to calculate price elasticity of supply using its formula and provide examples for better comprehension.

Price Elasticity of Supply Formula

The price elasticity of supply (PES) can be calculated using the following formula:

PES = (% Change in Quantity Supplied) / (% Change in Price)

This formula shows that the price elasticity of supply is a ratio of the percentage change in quantity supplied to the percentage change in price.

Steps to Calculate Price Elasticity of Supply

1. Identify the Initial and New Quantity Supplied

Gather data on the initial quantity supplied (Q1) and the new quantity supplied (Q2) after a change in price.

2. Calculate the Percentage Change in Quantity Supplied

Find out the difference between Q2 and Q1:

% Change in Quantity Supplied = ((Q2 – Q1) / Q1) x 100

3. Identify the Initial and New Price

Collect data on the initial price (P1) and new price (P2).

4. Calculate the Percentage Change in Price

Find out the difference between P2 and P1:

% Change in Price = ((P2 – P1) / P1) x 100

5. Compute Price Elasticity of Supply

Finally, use the calculated values to find PES:

PES = (% Change in Quantity Supplied) / (% Change in Price)

Example:

Let’s consider a scenario where an electronics manufacturer supplies 1000 units of a gadget at a price of $50. When it reduces its selling price by $10, it makes an additional 300 units available.

1. Initial Quantity Supplied (Q1) = 1000 units

New Quantity Supplied (Q2) = 1300 units

2. % Change in Quantity Supplied = ((1300 – 1000) / 1000) x 100 = 30%

3. Initial Price (P1) = $50

New Price (P2) = $40

4. % Change in Price = ((40 – 50) / 50) x 100 = -20%

5. PES = (30%) / (-20%) = -1.5

In this case, the price elasticity of supply is -1.5, indicating that the quantity supplied is relatively inelastic; it does not respond significantly to changes in price.

Conclusion

By calculating the price elasticity of supply, businesses can better understand the responsiveness of their goods or services to price fluctuations and make well-informed decisions on pricing strategies and production levels. Moreover, policymakers can use this information to analyze the impact of taxation, subsidies, and other economic interventions on different industries.