➤ How do you compare price elasticity at a common point on two demand curves?
Use point elasticity: E = (P/Q) × (dQ/dP). At the same P and Q, elasticity depends on local dQ/dP. If you use dP/dQ instead, E = (P/Q) × 1/(dP/dQ). The curve with the smaller absolute dP/dQ (a flatter curve) will show the greater elasticity magnitude.
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