선형 수요곡선 간 탄력성 비교 - 가격절편을 이용한 탄력성 비교 및 활용

초록

Price elasticities of demand are often mistakenly understood to directly depend on the slope of the demand curve although they are the ratio of the percentage change in quantity demanded to the percentage change in price. Focusing on linear demand curves, this paper shows that given price, price elasticity is determined not by the slope of the demand curve but by the price intercept. Based on this result, this paper also presents systematic ways to locate points with the same elasticity and to compare the elasticities of two points on different demand curves. The results of this paper will be useful for both learners and teachers of economics in understanding the concept of price elasticity of demand.

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