Price Elasticity

Price elasticity measures the percentage quantity response to a percentage price change under specified conditions. Demand elasticity is commonly discussed in absolute value: above one is elastic, below one is inelastic. The value depends on substitutes, customers, timing, and the price range.

Own-price demand elasticity relates the percentage change in quantity demanded to a percentage price change, with other relevant conditions held constant. For ordinary downward-sloping demand it is negative, so comparisons with one usually use its absolute value. Specify the product, customer group, and period; short-run response can differ from long-run substitution.

Revenue is price times quantity, while profit also subtracts costs. Even a demand response that supports higher revenue may require capacity or service spending that lowers profit. Observing price and sales move together does not identify elasticity if advertising, seasonality, or product quality also changed. Use a credible comparison and report uncertainty instead of treating a ratio from arbitrary dates as a causal estimate.

When to use it

When pricing strategy needs to account for demand sensitivity; when understanding why some price increases lose customers and others don't; when competitive strategy involves making demand less elastic; when evaluating market power and competitive position through the lens of price sensitivity.

How it can help

Estimate demand response using a credible comparison, then evaluate costs, capacity, retention, and customer value with revenue. Avoid assuming that necessities or a successful past increase establish permanent inelasticity.