📚 Year 13 WJEC Economics: Quick Terminology Memory Guide | WJEC 经济学术语速记指南
For Year 13 WJEC Economics, success hinges on precise terminology. This guide presents key terms with clever memory aids — from acronyms to visual hooks — so you can recall definitions accurately under exam pressure. Treat it as your mental toolbox for A2 microeconomics and macroeconomics.
在 WJEC Year 13 经济学考试中，成功的关键在于精准阐述术语。本指南通过缩写、联想等巧妙记忆法，帮你牢固掌握 A2 微观与宏观的核心词汇，在考场上快速准确提取定义。
1. Scarcity, Choice & Opportunity Cost | 稀缺性、选择与机会成本
Every economic decision arises from scarcity. Resources are finite, but human wants are infinite. This forces all agents — consumers, firms, governments — to make choices, each carrying an opportunity cost.
每个经济决策都源于稀缺性。资源是有限的，而人类的欲望是无限的。这迫使消费者、企业和政府等所有主体做出选择，每种选择都伴随着机会成本。
Scarcity — the condition where limited resources cannot satisfy all wants. Trick: “S” for “Shortage” — there is always a shortage of something.
稀缺性 (Scarcity) — 有限资源无法满足所有欲望的状态。记忆法：”S” 像 “少”(shǎo)，永远有某种短缺。
Opportunity cost — the value of the next best alternative forgone. Visualise: “O” = “Oh, what you give up!” It is the real cost of any decision.
机会成本 (Opportunity cost) — 放弃的次优选择的价值。联想：”O” 就像 “哦，你放弃了什么！” 它是任何决策的真实代价。
Factors of production — remember the acronym CELL: Capital, Enterprise, Land, Labour. Every economy needs healthy cells to function.
生产要素 — 记住缩写 CELL：资本 (Capital)、企业家才能 (Enterprise)、土地 (Land)、劳动 (Labour)。每个经济体都需要健康的细胞 (CELL) 来运转。
PPF (Production Possibility Frontier) — a curve showing the maximum combinations of two goods that can be produced with given resources. Think of it as the “Possibilities Fence” — it marks the boundary of what is achievable.
PPF (生产可能性边界) — 展示给定资源下两种产品最大产量组合的曲线。把它想象成 “可能性篱笆” — 标示出可达成的边界。
2. Costs, Revenues & Profit Maximisation | 成本、收益与利润最大化
Understanding cost and revenue curves is vital for analysing firm behaviour. The profit-maximising rule MR = MC is the golden thread linking these concepts.
理解成本与收益曲线对于分析企业行为至关重要。利润最大化法则 MR = MC 是连接这些概念的黄金法则。
Fixed cost (FC) — cost that does not vary with output, e.g. rent. Memory: “Fixed” rhymes with “sticks” — it sticks around even when output is zero.
固定成本 (FC) — 不随产量变动的成本，如租金。记忆法：”Fixed” 谐音 “sticks”（黏住）— 即使产量为零，它依然存在。
Variable cost (VC) — cost that changes directly with output. Connect “V” for “Varies”.
可变成本 (VC) — 随产量直接变化的成本。将 “V” 联系 “Varies”（变化）。
Marginal cost (MC) — the extra cost of producing one more unit. Remember: “Marginal” = “More”. MC = ΔTC ÷ ΔQ.
边际成本 (MC) — 多生产一单位产品所带来的额外成本。记住：”Marginal” 就是 “More”（更多）。MC = ΔTC ÷ ΔQ。
Marginal revenue (MR) — the extra revenue from selling one more unit. The profit-maximising rule: MR = MC. Trick: “Money’s Right when Marginal Cost matches”.
边际收益 (MR) — 多销售一单位产品所带来的额外收益。利润最大化法则：MR = MC。记忆法：”当边际收益等于边际成本时，钱就对了 (Money’s Right)”。
Normal profit — the minimum profit needed to keep a firm in the industry; it is part of average cost. It is zero supernormal profit. Think “Normal = N = No extra”.
正常利润 (Normal profit) — 企业留在行业内所需的最低利润，是平均成本的一部分。此时超常利润为零。联想：”Normal” 中的 “N” 意为 “No extra”（无额外利润）。
3. Market Structures: Perfect Competition to Monopoly | 市场结构：从完全竞争到垄断
WJEC expects you to compare market structures along several dimensions. Acronyms can help you recall the defining features of each.
WJEC 要求你从多个维度比较市场结构。缩写可帮助你记住每种结构的定义特征。
Perfect competition — many small firms, homogeneous product, no barriers, price takers. Use the acronym P-H-E-B: Price taker, Homogeneous goods, Efficient (allocatively), Barriers none.
完全竞争 (Perfect competition) — 许多小企业、同质产品、无进入壁垒、价格接受者。记忆缩写 P-H-E-B：价格接受者 (Price taker)、同质商品 (Homogeneous)、配置效率 (Efficient)、无壁垒 (Barriers none)。
Monopoly — a single firm dominates, high barriers, price maker. “M” for “Maker of price” and “Massive power”.
垄断 (Monopoly) — 一家企业主导、高进入壁垒、价格制定者。”M” 代表 “Maker of price”（价格制定者）和 “Massive power”（巨大权力）。
Oligopoly — a few large firms, mutual interdependence, kinked demand curve. Recall “OLIGO” = “Only a Limited number of Interdependent Giants Operate”.
寡头垄断 (Oligopoly) — 少数大企业、相互依赖、弯折的需求曲线。联想：”OLIGO” = “只有少数相互依赖的巨头在运营”。
Monopolistic competition — many firms, differentiated products, low barriers. Think of high-street coffee shops: many sellers, each slightly different.
垄断竞争 (Monopolistic competition) — 许多企业、产品差异、低壁垒。想象街上的咖啡店：众多卖家，每家产品稍有不同。
Barriers to entry — obstacles that make it difficult for new firms to enter a market. Examples include economies of scale, branding, legal patents. Slogan: “Barriers block entry — just like a fence”.
进入壁垒 — 阻碍新企业进入市场的障碍，如规模经济、品牌、专利。口号：”壁垒像篱笆一样阻挡进入”。
4. Contestable Markets & Economic Efficiency | 可竞争市场与经济效率
Contestable markets emphasise the threat of entry, not just the number of firms. Efficiency concepts — allocative, productive, dynamic, X-efficiency — are frequently tested in data-response and essay questions.
可竞争市场强调潜在的进入威胁，而不仅仅是企业数量。效率概念——配置效率、生产效率、动态效率和 X 效率——在数据分析题和论文题中频繁出现。
Contestable market — a market where entry and exit are costless, allowing “hit-and-run” competition. Memory: “Contestable = Can easily be Contested”.
可竞争市场 (Contestable market) — 进入和退出无需成本、能够发生 “打了就跑” 竞争的市场。记忆：”Contestable” 即 “很容易被挑战 (Contested)”。
Allocative efficiency — price equals marginal cost (P = MC); resources follow consumer preferences. Say: “Allocative aligns with consumer wishes”.
配置效率 (Allocative efficiency) — 价格等于边际成本 (P = MC)；资源分配符合消费者偏好。口诀：”配置效率与消费者意愿一致 (Aligns)”。
Productive efficiency — producing at the lowest point on the average cost curve (min AC). “Productive = Pragmatic, lowest cost”.
生产效率 (Productive efficiency) — 在平均成本曲线的最低点生产 (min AC)。”Productive = 注重实效 (Pragmatic)，成本最低”。
Dynamic efficiency — reinvestment of supernormal profits in innovation and R&D, lowering costs over time. “Dynamic = Development”.
动态效率 (Dynamic efficiency) — 将超常利润再投资于创新与研发，逐渐降低成本。”Dynamic = 发展 (Development)”。
X-inefficiency — organisational slack when firms lack competitive pressure, so costs rise above the attainable minimum. “X” marks the spot where extra fat exists.
X-非效率 (X-inefficiency) — 企业因缺乏竞争压力而出现的组织松懈，导致成本高于可达到的最低水平。”X” 标记了多余的脂肪位置。
5. Labour Market & Wage Determination | 劳动力市场与工资决定
WJEC Year 13 microeconomics digs into the demand for and supply of labour, wage differentials, and the impact of trade unions and monopsony employers.
WJEC 13年级微观经济学深入探讨劳动力需求与供给、工资差异，以及工会和买方垄断雇主的影响。
Marginal revenue product of labour (MRPL) — the extra revenue generated by hiring one more worker. MRPL = MPL × MR. Link: “MRP” sounds like “More Revenue per Person”.
劳动的边际收益产品 (MRPL) — 多雇佣一名工人所带来的额外收益。MRPL = MPL × MR。联想：”MRP” 听起来像 “每人创造更多收益 (More Revenue per Person)”。
Derived demand — demand for labour depends on the demand for the product it produces. “Derived” = “Depends on final Demand”.
引致需求 (Derived demand) — 对劳动力的需求取决于对它所生产产品的需求。”Derived” = “依赖于最终需求 (Depends on final Demand)”。
Elasticity of labour demand — responsiveness of quantity of labour demanded to a change in wage rate. Factors: substitutability of capital, time period. Shortcut: “SCEPTER” — Substitution, Cost proportion, Elasticity of product demand, Time.
劳动力需求弹性 — 劳动力需求量对工资率变化的反应程度。影响因素：资本替代性、时间等。助记：”SCEPTER” — 替代 (Substitution)、成本占比 (Cost proportion)、产品需求弹性 (Elasticity of product demand)、时间 (Time) 等。
Monopsony — a single buyer of labour, able to set wages below competitive levels. Remember: “Mono = One buyer; psony sounds like ‘only son’ — one child with huge power in the family”.
买方垄断 (Monopsony) — 劳动力市场的唯一买家，能够将工资压至竞争水平以下。记住：”Mono” 意为单一买家；”psony” 像 “独生子” — 家中唯一的、拥有巨大权力的孩子。
Trade union bargaining power — ability to raise wages above equilibrium, often via collective bargaining. Think of “TUB” — Trade Unions Bargain.
工会谈判力 — 通过集体谈判将工资提高到均衡水平以上的能力。联想 “TUB” — 工会 (Trade Unions) 谈判 (Bargain)。
6. Macroeconomic Objectives & Key Indicators | 宏观经济目标与关键指标
Governments aim to achieve four or five key macroeconomic objectives. Use a simple mnemonic to recall them all in an essay introduction.
政府旨在实现四到五个关键的宏观经济目标。用一个简单的助记词，就能在论文导语中全部想起。
The main objectives: low inflation, economic growth, low unemployment, balance of payments stability, and equitable income distribution. Acronym BIG E: Balance of payments, Inflation, Growth, Employment (and add ‘Equity’ or ‘Environment’ as extension).
主要目标：低通胀、经济增长、低失业、国际收支平衡、公平收入分配。缩写 BIG E：国际收支 (Balance of payments)、通胀 (Inflation)、增长 (Growth)、就业 (Employment)，再补充公平 (Equity) 或环境 (Environment)。
GDP (Gross Domestic Product) — the total value of output produced in an economy in a year. Real GDP strips out inflation. “GDP = Grand Domestic Product”.
GDP (国内生产总值) — 一个经济体一年内生产的总产出价值。实际 GDP 剔除了通胀。”GDP = 宏大的国内产品 (Grand Domestic Product)”。
CPI (Consumer Price Index) — a basket of goods used to measure inflation. “CPI = Check Price Inflation”.
CPI (消费者价格指数) — 用于衡量通胀的一篮子商品。”CPI = 检查价格通胀 (Check Price Inflation)”。
Claimant count vs LFS unemployment — claimant count is those receiving job-related benefits; LFS (Labour Force Survey) is ILO-based, measuring people actively seeking work. “CC counts claims; LFS looks for seekers”.
申领人数与劳动力调查失业 — 申领人数指领取失业救济金的人数；LFS (劳动力调查) 基于国际劳工组织标准，衡量积极寻找工作的人。”CC 数救济；LFS 看寻工”。
Balance of payments current account — records trade in goods, services, income and transfers. Think “Current = Cash flowing now”.
国际收支经常账户 — 记录商品、服务、收入和转移的贸易。联想：”Current = 现在的现金流动 (Cash flowing now)”。
7. Aggregate Demand & Aggregate Supply | 总需求与总供给
The AD/AS model is the workhorse of macroeconomics. Memorising components and shapes of curves allows you to analyse policies and shocks quickly.
AD/AS 模型是宏观经济学的核心工具。记住曲线的组成部分和形状，能让你快速分析政策和冲击。
Aggregate Demand (AD) — total spending in the economy: AD = C + I + G + (X – M). Use the mnemonic “CIG X-M” — imagine a cigarette brand “CIG” with net exports “X-M”.
总需求 (AD) — 经济中的总支出：AD = C + I + G + (X − M)。助记 “CIG X-M”：想象一个香烟品牌 “CIG” 加上净出口 “X-M”。
Consumption (C) — household spending; influenced by wealth, interest rates, confidence. “C” for “Consumer cash”.
消费 (C) — 家庭支出，受财富、利率和信心影响。”C” 代表 “消费者支出 (Consumer cash)”。
Investment (I) — business spending on capital goods; influenced by interest rates, accelerator, business confidence. “I” = “Industry spending”.
投资 (I) — 企业资本品支出，受利率、加速数和商业信心影响。”I” = “产业支出 (Industry spending)”。
Short-run Aggregate Supply (SRAS) — upward-sloping due to sticky wages
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