Income effect/substitution effect

Japanese: 所得効果・代替効果 - しょとくこうかだいたいこうか(英語表記)income effect
Income effect/substitution effect
An analytical term in the theory of consumer choice (behavior). When the price of a good remains constant and a consumer's income changes, the amount of each good purchased must change in order to maintain the same level of utility as before. The "income effect" shows how the amount of each good purchased must change when the price of a good changes while the consumer's income remains constant. In the diagram, the demand for food and clothing is determined at E , the point of intersection between the budget line AB and the indifference curve U.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
消費者選択(行動)の理論における分析用語。ある財の価格が一定で,消費者の所得が変化したとき,それ以前と同等の効用の水準を保つには諸財の購入量がそれぞれどのように変化しなければならないかを表すのが〈所得効果〉であり,一方,消費者の所得が一定である財の価格が変化したとき諸財の購入量がどのように変化しなければならないかを表すのが〈代替効果〉である。 図において食料・衣料の2財に対する需要は,予算線ABと無差別曲線Uとの接点Eに定まる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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