Yifei ZHANG
Dr. Yifei ZHANG
Economics
Senior Lecturer
BEcon/BEcon & Fin Deputy Programme Director and Admissions Tutor

3910 3102

KK 1332

Publications
The U.S. Debt Storm and the Reshuffling of Global Finance

In April 2025, global financial markets experienced an unprecedented credit crisis, with the yield on the 10-year U.S. Treasury skyrocketing to 4.5%, marking the largest weekly increase since 2001. What are the reasons behind this crisis? Is the tariff policy of the Trump administration a catalyst for market turmoil? Will the U.S. Treasury market successfully navigate through this crisis?

DeepSeek vs. OpenAI: Shaping a New Global AI Order

As competition in artificial intelligence (AI) development between the US and China heats up, DeepSeek R1 recently emerged as a serious contender. Challenging OpenAI with DeepSeek’s innovative algorithms and open-source strategy, the Chinese counterpart offers OpenAI’s GPT-4 performance at just 5% of the cost.

AI and Its Environmental Consequences: Can We Turn the Tide on Carbon Emissions?

What's the carbon footprint cost of AI to our planet? The cost is heavy. It's estimated that the training process of ChatGPT-4 has led to over 1,000 tons of CO² emissions. By 2030, it is projected that the AI industry will account for 3.5% of global carbon emissions.

AI and Its Environmental Consequences: Can We Turn the Tide on Carbon Emissions?

What's the carbon footprint cost of AI to our planet? The cost is heavy. It's estimated that the training process of ChatGPT-4 has led to over 1,000 tons of CO² emissions. By 2030, it is projected that the AI industry will account for 3.5% of global carbon emissions.

Challenges to ESG Investment: Who’s Pushing Back and Why?

Environmental, Social, and Governance (ESG) investing is rapidly gaining traction in global financial markets, aiming to integrate environmental protection and social responsibility into investment decisions to promote sustainable development. Despite its wide support, ESG investing faces criticism, particularly in the United States, where some state governments and the energy sector express concerns about its potential negative impact on the economy and business competitiveness.

Challenges to ESG Investment: Who’s Pushing Back and Why?

Environmental, Social, and Governance (ESG) investing is rapidly gaining traction in global financial markets, aiming to integrate environmental protection and social responsibility into investment decisions to promote sustainable development. Despite its wide support, ESG investing faces criticism, particularly in the United States, where some state governments and the energy sector express concerns about its potential negative impact on the economy and business competitiveness.

International Implementation and Prospect of Sustainable Public Procurement

Traditional public procurement policies mainly consider cost, quality, and user needs. In order to effectively support sustainable development and promote environmental protection in the public sector, the concept of "sustainable public procurement" has gradually become mainstream internationally. This concept emphasizes a balance of environmental, social, and economic benefits, and aims to promote sustainable development through government procurement activities.

International Implementation and Prospect of Sustainable Public Procurement

Traditional public procurement policies mainly consider cost, quality, and user needs. In order to effectively support sustainable development and promote environmental protection in the public sector, the concept of "sustainable public procurement" has gradually become mainstream internationally. This concept emphasizes a balance of environmental, social, and economic benefits, and aims to promote sustainable development through government procurement activities.

Biodiversity Risk Management: Global Strategies and Policy Implementation

What are the links between biodiversity and capital market investments? Over half of the global economy depends on nature. Protecting biodiversity can create new investment opportunities.