LSE 经济学挑战（LSESU Economics Society Economics Challeng）由 LSE 经济学学会严格命题与学术审核，融合高中与大学层次的经济学内容，旨在为全球优秀高中生提供与 LSE学术体系接轨的机会，激发他们的研究热情与批判思维，成为迈向世界顶尖学术殿堂的重要舞台。
官方主办：伦敦政治经济学院 (LSE) 最大、最具影响力的学会——经济学会官方主办，是 LSE 经济系唯一官方支持的学术学会
全球挑战：面向全球高中生的高水平学术挑战
教授命题 ：由 LSE 经济学教授亲自命题与学术审核
学术支持：LSE 经济学会提供专属备战学术材料
重磅福利！LSE知识点大纲 / LSE例题(含答案解析）/ LSE样题(含答案解析）/ LSE推荐学术资源（参考书/在线学习资源）
一、主办方 - LSESU Economics Society
伦敦政治经济学院经济学学会 (LSE Economics Society) 是 LSE 规模最大、最具影响力的学术社团之一，拥有超过 800名活跃会员。作为唯一由 LSE 经济学系官方支持的学会，它不仅是学生进入顶尖学术网络的重要平台，更代表着 LSE在经济学领域的学术权威与学术传承。
学会长期致力于推动前沿研究与学术交流，其旗舰刊物《Rationale》是由学生主导、同行评审的学术期刊，研究议题涵盖宏观经济、发展经济、金融市场与行为经济学等多个领域，部分成果甚至获得外部学界的引用和认可，充分展现了学生科研的深度与价值。
同时，学会以高规格学术活动与国际化交流著称。"Sen Club" 系列研讨会曾邀请包括 Amartya Sen、Eric Maskin、Oliver Hart 在内的多位诺贝尔经济学奖得主亲临演讲；年度 "LSE Economics Symposium" 更汇聚全球学者与学生，共同探讨当今最具影响力的经济议题，已成为学界与业界对话的重要平台。LSE 经济学会长期致力于为本科生及优秀高中生打造高水平的经济学学术挑战，其举办的一系列经济学竞赛在全球本科生中享有盛誉。
为了进一步拓展国际影响力，培养具备经济学思维与全球视野的青年人才，学会联合 LSE 教授团队与阿思丹国际竞赛平台合作共同推出权威性的全球赛事——LSESU Economics Society Economics Challenge （LSE 经济学挑战）。赛事由 LSE 经济学学会严格命题与学术审核，融合高中与大学层次的经济学内容，旨在为全球优秀高中生提供与 LSE学术体系接轨的机会，激发他们的研究热情与批判思维，成为迈向世界顶尖学术殿堂的重要舞台。
伦敦政治经济学院经济学会 （LSE Economics Society）团队人员
二、LSE经济学挑战赛制
适合年级：9-12 年级高中生
挑战形式：50 道选择题，个人形式参加
语言：英文
时长：90分钟
参与形式：个人挑战
地点：线上 / 校内
报名截止日期：2026 年 12 月 27 日
比赛日期：2027 年 1 月 9 日*
由于时差原因，部分地区的考试将于8日举行。
三、LSE经济学挑战样题
点击对应文字，一键直达👇👇👇
👉 样题-定量基础 Quantitative Foundations
👉 样题-TMUA风格的数学 TMUA-style Mathematics
① If the consumer price index was 75 in the base year and 130 in the following year, then the inflation rate was
（如果消费者价格指数在基准年为 75，在接下来的一年为 130，那么通货膨胀率就是）
a.57% b.58% c.73% d.42%
Explanation:
Inflation rate = percentage change of CPI = ((130/75)-1)x 100%
② Assume the MPC = 0.75 and considering only the multiplier effect, if government taxation increases by $60 billion, then national income will
（假设边际消费倾向（MPC）为 0.75，仅考虑乘数效应，如果政府税收增加 600 亿美元，那么国民收入将会）
a.Decrease 45 billion. b.Decrease 240 billion.
c.Increase 240 billion. d.Decrease 180 billion.
Explanation:
multiplier = 1/(1-MPC) = 1/ (1-0.75) =4.
Potential change in national change income = multiplier x tax change x MPC = 4x60x0.75=180
① Ms. Jane resigned from her job with a $60,000 annual salary to open a coffee shop in her apartment. Her coffee shop’s annual revenue is $80,000, and her costs for coffee beans, facility maintenance, water, and electricity amount to $30,000 per year. Should Ms. Jane be satisfied with her coffee shop’s annual profit?
（简女士辞去了年薪 6 万美元的工作，在自己的公寓里开了一家咖啡店。她的咖啡店年收入为 8 万美元，而咖啡豆、设施维护、水和电的费用每年总计 3 万美元。简女士应该对她的咖啡店的年利润感到满意吗？）
a.Yes, because her accounting profit is $50,000
b.Yes, because her economic profit is $50,000
c.No, because her economic loss is $20,000
d.No, because her economic loss is $10,000
Explanation:
Economic profit = Accounting profit – Implicit cost = $80,000 - $30,000 - $60,000 = -$10,000.
②Dawn, Inc. produces and sells notebook in a perfectly competitive market at the price of $3 per unit and hires all the workers it needs at the wage rate of $23. Assume worker is the only variable input, and the firm’s production schedule is provided in table.
（黎明公司在一个完全竞争的市场中生产并销售笔记本电脑，每台售价 3 美元，并以每小时 23 美元的工资雇佣所需的所有工人。假设工人是唯一的可变投入，该公司的生产计划表如下所示。）
| Number of workers | Quantity of Notebook |
| 0 | 0 |
| 1 | 10 |
| 2 | 21 |
| 3 | 28 |
| 4 | 33 |
Determine the profit-maximizing number of workers the firm should hire.
a.1 b.2 c.3 d.4
Explanation:
The firm maximizes profit where the value of the additional worker’s contribution (Marginal revenue) is just equal to orgreater than the wage(Marginal cost). Hiring a third worker would add only $21 of revenue while costing $23, leading to a loss. Thus, the profit-maximizing number of workers is 2.
3、定量基础 Quantitative Foundations
① Researcher Keynes is doing a field experiment.He discovers a random variable X that takes: ● X =2 with probability 0.4 ● X =10 with probability 0.6 What is E[X]and Var[X]?
（研究员凯恩斯正在做一项实地实验。他发现了一个随机变量X，其取值如下： ● X = 2 的概率为 0.4 ● X = 10 的概率为 0.6 求 E[X] 和 Var[X]。）
A.15.36,6.80
B.5.20,15.36
C.5.20,6.80
D.6.80,15.36
Explanation:
The expected value of a discrete random variable is calculated as the sum of each possible value multiplied by its probability.For random variable X,which takes the value 2 with probability 0.4 and 10 with probability 0.6,E [X]=(20.4)+(100 .6)=0.8 +6=6.80.The variance of a discrete random variable is calculated as E[X²]-(E[X])². First, calculate E[X²]:E[X²]=(2²0.4)+(10²0.6)=(40 .4)+(1000 .6)=1.6 +60 =61.6.Then, Var[X]=61.6 -(6 .80)²=61.6 -46.24 =15.36.
② A researcher has a null hypothesis that study hours have no effect on exam scores.Using data, the researcher obtains an estimate of the effect of 2.5 with a standard error of 0.5.What is the value of the t-statistic in this context?
（一位研究者提出原假设：学习时间对考试成绩没有影响。利用数据，该研究者得到效应估计值为2.5，标准误为0.5。在此情况下，t统计量的值是多少？）
A.0.20
B.1.25
C.2.50
D.5.00
Explanation:
The t-statistic measures the ratio of the magnitude of an estimate to its standard error.It is calculated as the estimate divided by the standard error.Substituting these values into the t-statistic formula gives 2.5 /0.5 =5.00.
4、TMUA风格的数学 TMUA-style Mathematics
① How many solutions are there to (1 + 3 cos 3 θ )2 = 4 in the interval 0° ≤ θ ≤ 180° ?
（在区间 0° ≤ θ ≤ 180° 内，方程 (1 + 3 cos 3θ)² = 4 有多少个解？）
A.3
B.4
C.5
D.6
Explanation:
We have (1 + 3cos3θ)2 = 4 if and only if 1 + 3cos3θ = ±2. We consider each possibility separately.
We have1 +3cos3θ = 2
if and only if 3cos3θ = 1
if and only if cos3θ = 1/3.
Since 0° ≤ θ ≤ 180° , we have 0° ≤ 3θ ≤ 540° , and there are 3 values of 3θ which have cos3θ = 1/3 in this interval. (One is between 0° and 90° , one is between 270° and 360° , and one is between 360° and 450° , by considering the graph of y =cosx.)
Now considering the other possibility, we have1 +3cos3θ = − 2
if and only if 3cos3θ = − 3
if and only if cos3θ = − 1.
Again, 0° ≤ 3θ ≤ 540° , but this time there are only 2 values of 3θ which satisfy the equation: 3θ = 180 and 3θ = 540° .
Neither of these values of 3θ overlap with the values of 3θ found earlier, so in total there are 3 +2 = 5 values of 3θ in the interval 0° ≤ 3θ ≤ 540° , and hence 5 solutions to the originalequation in the given interval. The correct answer is option C.
② Let x be a real number.
Which one of the following statements is a sufficient condition for exactly three of the other four statements?
（设 x 为一个实数。以下哪一个陈述是其余四个陈述中恰好有三个成立的充分条件？）
A. x ≥ 0
B. x = 1
C. x = 0 or x = 1
D. x ≥ 0 or x ≤ 1
E. x ≥ 0 and x ≤ 1
Explanation:
We work through them sequentially:
A If x ≥ 0, then B may be false, C may be false, D may be false and E may be false
B If x=1, then A is true, C is true, D is true and E is true
C If x=0 or x=1, then A is true, B may be false, D is true and E is true
D If x ≥ 0 or x ≤ 1, then A may be false (for example if x = − 1), B may be false, C may be false and E may be false
E If x ≥ 0 and x ≤ 1, then A is true, B may be false, C may be false and D is true
The correct option is therefore C, which is sufficient for exactly three of the other four statements.
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四、奖项设置
• 电子证书：所有同学均可获得参与证书，获奖同学获得 LSE 经济学会和阿思丹联合颁布的获奖证书，均通过电子 证书发放。
• 获奖选手将有机会参加剑桥圣凯瑟琳学院经济学夏校。此夏校只针对国际经济学竞赛中顶尖获奖选手开放。
