Mastering Case Study Analysis for SQA Economics | SQA 经济案例分析实战演练

📚 Mastering Case Study Analysis for SQA Economics | SQA 经济案例分析实战演练

Case studies test your ability to apply economic theories to real-world scenarios, a skill crucial for the SQA Advanced Higher Economics exam. In this guide, we will walk through a systematic approach to case study analysis, complete with a practical example and marking insights.

案例分析考查你将经济理论应用于实际情境的能力，这是SQA高级经济学考试的关键技能。本指南将带你系统掌握案例分析的方法，并附上实战演练和评分要点。

1. Understanding the Case Context | 理解案例背景

Begin by reading the case slowly to absorb the narrative. Identify the main economic agents involved, the market or policy in question, and any time frame or geographical setting.

首先要慢读案例，理解其叙述。识别所涉及的主要经济主体、讨论的市场或政策，以及时间范围或地理背景。

Highlight quantitative data such as prices, quantities, elasticities, tax rates, and growth figures. These numbers will later anchor your analysis and diagram drawing.

标出定量数据，如价格、数量、弹性、税率和增长数据。这些数字将成为后续分析和图表绘制的基础。

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2. Identifying Key Economic Concepts | 识别关键经济概念

Scan the case for triggers like ‘market failure’, ‘government intervention’, ‘monopoly power’, ‘inflation’, or ‘unemployment’. Write down the relevant microeconomic or macroeconomic concepts.

快速扫描案例中的关键词，如“市场失灵”、“政府干预”、“垄断势力”、“通胀”或“失业”。写下相关的微观或宏观经济概念。

For a case about a sugar tax, the essential concepts usually include negative externalities, price elasticity of demand, tax incidence, and welfare loss.

对于糖税案例，核心概念通常包括负外部性、需求价格弹性、税收归宿和福利损失。

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3. Applying Theory to Data | 将理论应用于数据

Match each concept to the specific evidence in the case. If the case mentions ‘obesity costs the NHS £6 billion annually’, link this to the negative consumption externality and explain how a tax can internalise that cost.

将每个概念与案例中的具体证据对应起来。如果案例提到“肥胖每年给英国国民医疗服务体系造成60亿英镑的损失”，则将其与负消费外部性联系起来，并解释税收如何将这一成本内部化。

Use the data provided to calculate economic effects. For instance, if demand is inelastic (e.g., PED = -0.4), explain that consumers will bear a larger share of the tax burden and consumption will fall only slightly. Highlight the formula for tax share: consumer burden = PES/(PES + |PED|).

利用所提供的数据计算经济影响。例如，如果需求缺乏弹性（如 PED = -0.4），则解释消费者将承担绝大部分税负，而消费量仅会小幅下降。可强调税负分摊公式：消费者负担 = PES/(PES + |PED|)。

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4. Diagram Analysis and Interpretation | 图表分析与解释

Always draw a clearly labelled diagram when the question requires it. For a tax, draw a negative externality graph or a standard demand–supply model with the supply curve shifting leftwards by the tax amount.

当题目有要求时，一定要画出标注清晰的图表。对于税收，可以画出负外部性图或标准供求模型，将供给曲线向左移动税收额。

Label all axes (price and quantity), both equilibrium points (before and after tax), the tax wedge, and the areas of consumer surplus, producer surplus, government revenue, and deadweight loss. A title like “Figure 1: Effect of a Sugar Tax on the Market” is essential.

标注所有坐标轴（价格和数量）、均衡点（税前与税后）、税收楔子以及消费者剩余、生产者剩余、政府税收和无谓损失的区域。标题如“图1：糖税对市场的影响”必不可少。

In your written commentary, refer to the diagram: “As shown in Figure 1, the supply curve shifts from S to S + tax, raising the consumer price to Pc and reducing equilibrium quantity to Q1. The shaded triangle represents the deadweight loss.”

在文字评论中要提及图表：“如图1所示，供给曲线从S移至S+tax，消费者价格升至Pc，均衡数量降至Q1。阴影三角形代表无谓损失。”

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5. Evaluation and Critical Thinking | 评估与批判性思维

Evaluation is the skill that distinguishes top grades. Go beyond the immediate analysis and question the policy’s effectiveness – especially when demand is inelastic, the quantity change may be small. Consider unintended consequences, such as substitution towards other untaxed sugary foods.

评估是区分高分的技能。要超越直接分析，审视政策的有效性——尤其是当需求缺乏弹性时，数量变化可能很小。考虑意外后果，例如消费者转向其他未征税的高糖食品。

Discuss equity: a sugar tax is often regressive, hitting low-income households harder. Also note administrative costs, compliance issues, and the time lag before health benefits appear. Always compare with alternative policies, such as public education, labelling regulations, or subsidies for healthy alternatives.

讨论公平性：糖税通常具有累退性，对低收入家庭冲击更大。还要注意行政成本、合规问题以及健康收益需要较长时间才能显现。始终要与替代政策进行比较，如公共教育、标签法规或对健康替代品的补贴。

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6. Time Management and Exam Strategy | 时间管理与考试策略

In the SQA Advanced Higher exam, case study questions can carry a significant share of the total marks. Allocate the first 5–8 minutes to reading, highlighting, and planning your answer structure – note the key concepts and diagram you will draw.

在SQA高级经济学考试中，案例分析题往往占总分比重很大。首先留出 5–8 分钟阅读、标记要点并规划答案结构——记下关键概念和你将要绘制的图表。

Use mark allocations as a timing guide: for a 12-mark question, aim for 3–4 developed analytical points plus a balanced evaluation paragraph. Leave 2–3 minutes at the end to review your diagrams, check units, and correct any missing labels.

根据分值安排时间：一道12分的题目，争取写出3–4个展开的分析论点，并加上一段均衡的评估。最后留出2–3分钟检查图表、单位和遗漏的标注。

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7. Common Pitfalls and How to Avoid Them | 常见陷阱及如何避免

Pitfall 1: Descriptive answers without analysis. Avoid merely repeating case details; always link facts to economic theory using phrases like “This illustrates the concept of…”.

陷阱一：描述性答案，缺乏分析。避免仅仅重复案例细节；始终用“这阐释了……的概念”等短语将事实与经济理论相联系。

Pitfall 2: Omitting or mislabelling the diagram. Even if not explicitly demanded, a well-drawn and labelled diagram can lift your marks. Always put a title and label equilibrium points.

陷阱二：遗漏或错误标注图表。即使题目未明确要求，一幅绘制精良、标注清晰的图表也能提升分数。一定要加标题并标注均衡点。

Pitfall 3: Weak or one-sided evaluation. To access the top mark bands, you must present both strengths and weaknesses. Use connecting words like “However,” “In contrast,” “In the long run,” and support claims with data from the case.

陷阱三：评估薄弱或片面。要进入高分段，必须呈现优点与缺点。使用“然而”、“相比之下”、“长期来看”等连接词，并用案例数据支撑主张。

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8. Practical Exercise: The Sugar Tax Case | 实战演练：糖税案例

Case extract: “In response to rising obesity rates, the government is considering a 20% ad valorem tax on sugary drinks. Current market data: equilibrium price £1.50 per litre, quantity 100 million litres per year. Estimated PED = -0.5, PES = 0.8. Obesity-related healthcare costs are £500 million annually. Some health campaigners argue for a complete ban on sugary drink advertising.”

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

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