AQA A-Level Economics Year 13: Key Terms Quick Memorisation Guide | AQA A-Level 经济学（年13）词汇术语速记指南

📚 AQA A-Level Economics Year 13: Key Terms Quick Memorisation Guide | AQA A-Level 经济学（年13）词汇术语速记指南

This Year 13 AQA Economics glossary guide delivers essential terms with paired English-Chinese explanations. Read each definition in English then its Chinese counterpart to reinforce dual-language learning and rapid recall for exam success.

本 Year 13 AQA 经济学词汇指南以英中对译的形式呈现关键术语定义，先读英文再读中文，加强双语学习，帮助快速记忆以应对考试。

1. Consumer Behaviour and Elasticities | 消费者行为与弹性

Utility is the satisfaction gained from consumption. A rational consumer aims to maximise total utility subject to a budget constraint.

效用指消费获得的满足感。理性消费者在预算约束下追求总效用最大化。

Marginal utility (MU) is the extra satisfaction from consuming one additional unit. The law of diminishing marginal utility states that MU falls as consumption rises.

边际效用（MU）是每增加一单位消费带来的额外满足。边际效用递减规律指出，随着消费增加，MU 会下降。

Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price. Formula: PED = (%ΔQd) / (%ΔP). For inelastic demand |PED| < 1, for elastic |PED| > 1.

需求价格弹性（PED）衡量需求量对价格变动的反应程度。公式：PED = （需求量变动 %） / （价格变动 %）。|PED| < 1 为缺乏弹性，|PED| > 1 为富有弹性。

Income elasticity of demand (YED) shows how demand changes with income. Positive YED indicates a normal good; negative YED indicates an inferior good.

需求收入弹性（YED）反映需求随收入变化的程度。正的 YED 表示正常品；负的 YED 表示低档品。

Published by TutorHao | Year 13 Economics Revision Series | aleveler.com