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Illuminating the effects of the US-China tariff war on China’s economy
Illuminating the effects of the US-China tariff war on China’s economy
This paper studies the impact of the US-China tariff war on China, using high-frequency night lights data and grid-level measures of tariff exposure. Exploiting within-grid variation over time and controlling extensively for grid-specific contemporaneous trends, we find that each one-percentage-point increase in exposure to the US tariffs was associated with a 0.59% reduction in night-time luminosity. This impact was highly skewed across locations: Grids with negligible direct exposure to the US tariffs accounted for 70% of China’s population. But the tail 2.5% of China’s population with the highest exposure saw an implied 2.52% (1.62%) decrease in income per capita (employment) relative to unaffected grids. These effects were moreover concentrated in locations with a high commuting openness. By contrast, we do not find significant effects from China’s retaliatory tariffs, and offer evidence of several channels through which the impact on imported inputs was mitigated. In a parallel analysis at the prefecture level, we confirm that the US tariffs had discernible negative aggregate consequences.

English language requirement and educational inequality: Evidence from 16 million college applicants in China
English language requirement and educational inequality: Evidence from 16 million college applicants in China
This paper studies the unintended effect of English language requirement on educational inequality by investigating how the staggered rollout of English listening tests in China’s high-stakes National College Entrance Exam (NCEE) affected the rural–urban gap in college access. Leveraging administrative data covering the universe of NCEE participants between 1999 and 2003, we find that the introduction of English listening tests significantly lowered rural students’ exam score percentile ranks relative to their urban counterparts, resulting in a 30% increase in the rural–urban gap in college access. Our back-of-the-envelope calculations suggest that, as a result of this policy change, more than 54,000 rural students lost college seats to their urban peers between 1999 and 2003, and another 11,000 rural students who elite colleges could have admitted ended up in non-elite colleges, causing them significant future income losses.

Accounting information and risk shifting with asymmetrically informed creditors
Accounting information and risk shifting with asymmetrically informed creditors
This paper explores the effects of public information such as accounting earnings in a competitive lending setting with risk shifting. Debt financing creates incentives for borrowers to take on excessive risks, in particular in bad states of the world. If a privately informed inside creditor bids against outside creditors to extend a loan, public information levels the playing field, which affects the bidding and risk shifting. Nonetheless, a perfect public signal would yield the least efficient outcome: introducing some measurement noise alleviates risk shifting by subjecting outside creditors to the winner’s curse, allowing borrowers in bad states cheaper access to loans. However, for pessimistic priors about the borrower, greater public signal precision can alleviate risk shifting, at the margin. We discuss implications for financial reporting regulations along the business cycle and for creditor turnover.

Casting a Light on Dark Venues
Casting a Light on Dark Venues
Increased trading in dark venues around earnings announcements offers advantages to businesses and markets that can allay regulators’ concerns
How to Predict Popularity
How to Predict Popularity
If the many functions of digital social media networks could be summed up in one word, it would likely be “sharing”. Through a myriad of apps and platforms, we share our thoughts, feelings, opinions, ideas, and more – with our friends and family, with our online social circles, with strangers, and even with companies.
Carry trade by Trucks
Carry trade by Trucks
New research shows that traders can bypass capital controls by transporting goods across borders by truck to reap currency carry rewards. We look at how they do it and what the consequences are
Learning to Coordinate in Firms’ Behaviours  – Dr. Jasmine Yu HAO
Learning to Coordinate in Firms’ Behaviours – Dr. Jasmine Yu HAO
While computer languages may sound alien to economics, I aim to showcase that good programming skills are conducive not limited to economic research, it can also open up endless career possibilities for you in the business world.

To Imagine the Future of Digital Currencies – Dr. Yang YOU
To Imagine the Future of Digital Currencies – Dr. Yang YOU
As a teacher, I will push myself to understand the expectations of local employers' and the market dynamics of Hong Kong.

From Quantum Physics to Quantitative Marketing – Dr. Chu (Ivy) Dang
From Quantum Physics to Quantitative Marketing – Dr. Chu (Ivy) Dang
As a science person, I am impressed by our students' strong business acumen. But as a teacher, other than teaching them how to use quantitative tools to make scientific claims, I also hope that I can encourage them to continue to stay inquisitive about the world and apply their classroom knowledge for the betterment of the society.

Behavioural Economics on Risk Aversion and Gambling
Behavioural Economics on Risk Aversion and Gambling
Can money make the world go around? Do economic gains always drive people to make rational decisions? We have too little time for too much information and people usually rely on their intuition to make choices.
Implications of Western New Industrial Policies for Hong Kong
Implications of Western New Industrial Policies for Hong Kong
In the past, Hong Kong and Western countries followed neoliberal economic policies. However, due to changes in the geopolitical and economic landscape, as well as frequent disruptions to supply chains, many governments have shifted their focus to economic security and have implemented industrial policies in recent years.
Did Oil Companies Collude to Set Gasoline Prices in Hong Kong?
Did Oil Companies Collude to Set Gasoline Prices in Hong Kong?
Hong Kong has the highest retail fuel prices globally. When oil companies adjust their retail prices, they tend to raise prices simultaneously. Some might argue that the persistently high fuel prices in Hong Kong are due to the high land costs for gas stations. However, when examining the revenue record of oil companies, this argument seems invalid.
Behavioural Economics on Risk Aversion and Gambling
Behavioural Economics on Risk Aversion and Gambling
Can money make the world go around? Do economic gains always drive people to make rational decisions? We have too little time for too much information and people usually rely on their intuition to make choices.
Implications of Western New Industrial Policies for Hong Kong
Implications of Western New Industrial Policies for Hong Kong
In the past, Hong Kong and Western countries followed neoliberal economic policies. However, due to changes in the geopolitical and economic landscape, as well as frequent disruptions to supply chains, many governments have shifted their focus to economic security and have implemented industrial policies in recent years.
Changing Consumption Habits and The Need for a Clearer Positioning of Structural Issues
Changing Consumption Habits and The Need for a Clearer Positioning of Structural Issues
Prof. Heiwai Tang, Associate Dean of HKU Business School and Director of Asia Global Institute, shared about the Hong Kong economic policies in an interview with EDigest. He pointed out that Hong Kong's economic "upstream" faces numerous issues, such as loans, rent, and raw material supply. These factors have kept the operating costs high for "downstream" businesses. Resolving these problems in a society that upholds small-government free-market principles is undoubtedly a tremendous challenge.