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，伦敦政治经济学院经济学会（LSE规模最大、最具影响力的学术社团之一）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——LSE 经济学挑战 （LSESU Economics Society Economics Challenge）。

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。

宏观经济学 Macroeconomics

① If the consumer price index was 75 in the base year  and 130 in the following year, then the inflation rate was

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

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

微观经济学 Microeconomics

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?

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.

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.

定量基础 Quantitative Foundations

① The mean of 4, 6, 24, 14, 2 is

a.4      b.6      c.8      d.10

Explanation:

Mean equals to average, (4+6+24+14+2)/5=10

② The mean of 4 number is 30. The mean of the smallest 3 of them is 20. If the range of the data is 42, what isthe mean of the largest 3?

a.34      b.36      c.42      d.48

Explanation:

The sum of all 4 numbers is 4×30=120.The sum of the smallest 3 is 3×20=60.So, the largest number is 120–60=60.Given the range is 42, the smallest number is 60–42=18.Thus, the two middle numbers must sum to 120–(18+60)=42.

The largest 3 numbers therefore sum to 42+60=102, giving a mean of 102÷3=34

1、哪些人可以参加LSE经济学挑战？

LSE经济学挑战适合9-12 年级学生参加，参赛者需以个人形式参与。

2、LSE经济学挑战赛报名费用多少？

240元/次（含考试注册费、电子证书、评审费和考务费）。

3、LSE经济​学挑战赛可以以中文参与吗？

目前LSE经济学挑战赛仅以英文作为参赛语言，参与者可以根据个人情况选择线上或线下参与比赛。​