The Elasticity Concept

A tiny change in price can quietly move crowds of buyers—or leave them unfazed. Gas prices jump, flights go on sale, a streaming app bumps its fee, and yet our reactions aren’t equal. Why do small nudges in cost sometimes trigger stampedes, and other times barely a shrug?

Sometimes a 10% price hike barely dents sales; other times, that same 10% wipes out half the customers. The missing piece is not just *that* buyers react, but *how strongly*—and that strength isn’t random. It follows patterns tied to habits, alternatives, and time.

This is where the concept of elasticity steps in. It doesn’t just say “people are sensitive to price” or “they’re not”; it puts a number on that sensitivity. That number tells a policymaker how much a cigarette tax will actually cut smoking, or a retailer how far they can discount before profit margins snap.