📚 Year 7 Cambridge Economics: Your Guide to International Competitions | Year 7剑桥经济：国际竞赛备战攻略
Starting to explore economics at Year 7 not only builds a strong academic foundation but also opens doors to exciting international competitions. This guide will walk you through how to prepare effectively, master key concepts, and develop the skills needed to excel in junior economics challenges.
从 Year 7 开始接触经济学不仅能打下扎实的学术基础，还能为你打开通向国际竞赛的大门。本攻略将带你了解如何高效备战，掌握核心概念，并培养在青少年经济学竞赛中脱颖而出的能力。
1. Why Compete in Economics? | 为何参加经济学竞赛？
Competitions transform textbook ideas into real-world puzzles, making learning more enjoyable. They also boost your academic profile and help you connect with like-minded peers from around the globe.
竞赛能将书本知识变成真实世界的问题，让学习更有趣。它们还能提升你的学术简历，并帮你结识来自全球志同道合的同龄人。
Moreover, participating in challenges teaches you to think critically and manage time under pressure – skills that are valuable far beyond the classroom.
此外，参加竞赛能教会你批判性思考和压力下的时间管理，这些技能在课堂之外同样宝贵。
2. Knowing the Competition Landscape | 了解竞赛全景
Junior economics competitions, such as the Young Economist Challenge or the Global Junior Economics Olympiad, typically include multiple-choice questions, data-response tasks and short essays. Most are held online and last between 45 and 90 minutes.
青少年经济学竞赛，如青年经济学家挑战赛或全球青少年经济学奥林匹克，通常包含选择题、数据分析题和简答题。多数为线上进行，时长在45到90分钟之间。
Familiarising yourself with the format early on prevents surprises on the day and allows you to focus your revision on the question styles you will encounter.
提前熟悉竞赛形式能避免考试当天措手不及，让你把复习重点放在实际会遇到的题型上。
3. Core Concepts: Scarcity and Choice | 核心概念：稀缺与选择
Every economic question starts with scarcity: our wants are unlimited, but resources are limited. Because of scarcity, we must make choices, and every choice involves giving something up.
每个经济学问题都源于稀缺性：我们的欲望无限，但资源有限。因为稀缺，我们必须做出选择，而每个选择都意味着放弃某些东西。
This ‘next best alternative forgone’ is called opportunity cost. For example, if you spend an hour studying economics instead of playing video games, the opportunity cost is the enjoyment of that gaming time.
这个“被放弃的次优选择”就是机会成本。例如，如果你用一小时学习经济学而不是玩电子游戏，机会成本就是那段游戏时间带来的快乐。
4. Understanding Markets: Supply and Demand | 理解市场：供给与需求
The law of demand states that, all else being equal, as price rises, quantity demanded falls. The demand curve slopes downwards. The law of supply says that as price rises, quantity supplied rises, giving an upward-sloping supply curve.
需求定律指出，在其他条件不变时，价格上升则需求量下降。需求曲线向下倾斜。供给定律指出，价格上升则供给量上升，形成向上倾斜的供给曲线。
Where demand and supply meet, we find the equilibrium price. If the market price is below equilibrium, a shortage pushes prices up; if above equilibrium, a surplus drives prices down.
需求与供给相交的点就是均衡价格。若市场价格低于均衡，短缺会推高价格；若高于均衡，过剩会压低价格。
5. Opportunity Cost in Decision Making | 决策中的机会成本
Opportunity cost is not simply money – it includes time, effort and the benefit lost from the next best option. When a government chooses to build a hospital instead of a motorway, its opportunity cost is the improved transport the road would have provided.
机会成本不仅是金钱，还包括时间、精力以及从次优选项中失去的收益。当政府选择建造医院而非高速公路时，机会成本就是原本修路能带来的交通改善。
Practise calculating opportunity cost with numbers. For instance, if moving from 10 units of good A to 11 costs 2 units of good B, the opportunity cost of one extra unit of A is 2 units of B.
练习用数字计算机会成本。例如，若将商品A从10单位增加到11单位需要放弃2单位商品B，那么多获得一单位A的机会成本就是2单位B。
6. Reading and Interpreting Economic Data | 阅读与解读经济数据
Competitions often present tables and charts. A production possibility table shows maximum output combinations. From it, you can deduce opportunity costs and identify efficiency.
竞赛常出现表格和图表。生产可能性表格展示最大产出组合，从中可以推断机会成本并判断效率。
| Country | Wheat (tonnes) | Rice (tonnes) |
|---|---|---|
| A | 50 | 50 |
| B | 60 | 30 |
In the table, Country A gives up 1 tonne of wheat for each extra tonne of rice; Country B gives up 2 tonnes of wheat. Comparing these ratios tells you who has a comparative advantage.
在该表中，A 国每多生产1吨大米需放弃1吨小麦；B 国需放弃2吨小麦。比较这些比率就能判断谁具有比较优势。
When you see a graph, check the axes, trend and any shifts. Always label changes clearly and explain how they affect price and quantity.
看到图表时，先确认坐标轴、趋势和任何移位。要清晰标出变化并解释它们如何影响价格和数量。
7. Answering Multiple-Choice Questions | 回答选择题的策略
Read the stem twice and underline keywords such as ‘increase’, ‘decrease’ or ‘not’. Eliminate obviously wrong options first – this narrows your choices and improves accuracy.
仔细阅读题干两遍，圈出“增加”“减少”或“不是”等关键词。先排除明显错误的选项，这能缩小范围并提高正确率。
Be wary of absolute words like ‘always’ or ‘never’. In economics, exceptions exist, so answers using such language are often incorrect.
警惕“总是”“永不”等绝对化词语。经济学中常存在例外，因此带有这类措辞的选项很可能是错的。
8. Tackling Short-Answer Questions | 解答简答题
Structure your response with a clear point, evidence and explanation. Start by restating the question, then give your answer backed by an economic term or diagram reference.
作答时采用“观点—证据—解释”的结构。先复述问题，然后给出答案并附上经济术语或图表引用。
For example, ‘If the government imposes a tax on sugary drinks, supply decreases, raising the price and reducing quantity demanded. This helps tackle obesity.’ Use connectives to make your logic flow.
例如，“如果政府对含糖饮料征税，供给减少，价格上升，需求量下降，这有助于应对肥胖。”使用连接词让逻辑顺畅。
9. Time Management and Exam Technique | 时间管理与考试技巧
Divide your total time by the number of marks to gauge how long to spend on each question. Tackle easier sections first to bank quick points, then return to trickier problems.
用总分值除以总时间，判断每道题大约该花多久。先做容易的部分快速得分，再回头解决较难的题。
Keep an eye on the clock but don’t panic. If stuck, mark the question and move on – a fresh look later often brings clarity.
留意时间但不必慌张。如果卡住了，标记题目然后继续，稍后换个思路往往能豁然开朗。
10. Building Your Knowledge Beyond the Classroom | 课外知识拓展
Read real-world economic news from student-friendly sources. Books like ‘The Economics Book’ (DK) or ‘Economics for Beginners’ explain concepts with pictures and stories.
阅读适合学生的财经新闻。像《The Economics Book》（DK）或《Economics for Beginners》这样的书籍用图片和故事解释概念。
Use websites such as BBC Bitesize and the economics section of educational platforms to watch short videos and test yourself with quizzes.
利用 BBC Bitesize 和教育平台的经济学板块观看短视频，并通过小测验自测。
| Resource Type | Name | Why It Helps |
|---|---|---|
| Book | Economics for Beginners | Simple language, colourful illustrations |
| Website | BBC Bitesize | Free courses and revision materials |
| Video | Crash Course Economics | Engaging animated explanations |
Discussing everyday observations – like why cinema popcorn is expensive – helps you apply economic thinking naturally.
多讨论日常观察，比如为什么电影院爆米花很贵，能自然地应用经济学思维。
11. Practice Resources and Mock Tests | 练习资源与模拟测试
Ask your teacher or school economics club for past paper collections. Many competition organisers publish sample questions on their official websites.
向老师或学校经济学社团索要过往试卷合集。许多竞赛主办方会在官网上公布样题。
Set up a mini mock test at home: time yourself, avoid distractions, and review your answers afterwards. This builds exam stamina and reveals weak areas.
在家进行迷你模拟测试：计时、排除干扰、考后复盘。这能培养考试耐力并暴露薄弱环节。
12. Final Words of Encouragement | 最后的鼓励寄语
Remember, every economist started as a curious student. Mistakes are part of the learning journey – each one teaches you something new. Stay curious, keep practising, and enjoy exploring the fascinating world of economics.
请记住，每位经济学家都曾是一名充满好奇的学生。犯错是学习旅程的一部分，每次错误都让你学到新东西。保持好奇，坚持练习，享受探索经济世界的美妙过程。
The skills you build through competition preparation will serve you well in future studies, whether you pursue economics or any other field.
通过备战竞赛培养的技能，无论你未来学习经济学还是其他领域，都会让你受益无穷。
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