学术论文
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全球学者
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枪与玫瑰:警方与色情灰色产业链
枪与玫瑰:警方与色情灰色产业链
警方包庇有组织犯罪的情况偶有所闻,但往往很难通过实证来研究。研究利用来自中国独特的性交易数据,证实地方警察或对一些有组织的卖淫活动提供庇护。具体而言,位于警力密度较高的社区内的桑拿浴室和按摩院,受到警方「保护」的机会较高,进而可以进行高风险、高罪责的卖淫活动。在地方警察「扫黄」期间,这种庇护效应更加明显,意味着选择性执法的存在。地方领导层的变化和中央政府纪律部队巡视则会显著减弱这种庇护效应。

协调政府与汽车制造商兴建电动车充电站
协调政府与汽车制造商兴建电动车充电站
Accessibility of Electric Vehicle (EV) charging stations is an important factor for adoption of EV, which is an effective green technology for reducing carbon emissions. Recognizing this, many governments are contemplating ideas for achieving EV adoption targets, such as constructing extra EV charging stations directly or offering subsidies to entice automakers to construct more EV charging stations. To achieve these targets, governments need to coordinate with automakers to ensure that the total number of charging stations is planned optimally. We study this coordination problem by considering the interactions among the government, automakers, and consumers, our equilibrium analysis yields three major results. First, both the government and the automaker should build extra EV charging stations when their construction costs are independent. Simultaneously, the government should offer a per-station subsidy to the automaker only when the adoption target and the construction cost are both high. However, when the construction costs are dependent, the government should delegate the construction to the automaker by offering a per-station subsidy. Second, when the government considers consumer purchase subsidy as an extra lever, we find that the purchase subsidy for consumers is more cost-effective than offering a per-station subsidy to the automaker. Third, the structure of the optimal government policy remains the same regardless of whether the government's goal is to improve EV adoption or consumer welfare. Our results can serve as guidelines for governments when contemplating coordination with automakers for the construction of EV charging stations to improve EV adoption as well as consumer welfare further.

Scheduling of Physicians with Time-Varying Productivity Levels in Emergency Departments
Scheduling of Physicians with Time-Varying Productivity Levels in Emergency Departments
Emergency department (ED) overcrowding and long patient wait times have become a worldwide problem. We propose a novel approach to assigning physicians to shifts such that ED wait times are reduced without adding new physicians. In particular, we extend the physician rostering problem by including heterogeneity among emergency physicians in terms of their productivity (measured by the number of new patients seen in 1 hour) and by considering the stochastic nature of patient arrivals and physician productivity. We formulate the physician rostering problem as a two-stage stochastic program and solve it with a sample average approximation and the L-shaped method. To formulate the problem, we investigate the major drivers of physician productivity using patient visit data from our partner ED, and find that the individual physician, shift hour, and shift type (e.g., day or night) are the determining factors of ED productivity. A simulation study calibrated using real data shows that the new scheduling method can reduce patient wait times by as much as 13% compared to the current scheduling system at our study ED. We also demonstrate how to incorporate physician preference in scheduling through physician clustering based on productivity. Our simulation results show that EDs can receive almost the full benefit of the new scheduling method even when the number of clusters is small.

Purple Haze, All in My Brain
Purple Haze, All in My Brain
Jian Zhang from the HKU Business School along with authors from the Shanghai Advanced Institute of Finance at Shanghai Jiao Tong University, INSEAD in Singapore and the PBC School of Finance at Tsinghua University, helped to advance understanding of this phenomenon in their recent paper, called Air Pollution, Behavioral Bias, and the Disposition Effect in China. The team studied how air pollution can affect mental health by intensifying a certain type of cognitive bias observed in financial markets.
Future Anxiety – How COVID-19 Led People to Save More Money
Future Anxiety – How COVID-19 Led People to Save More Money
Take the recent study by Chen Lin and Mingzhu Tai from the HKU Business School, conducted with collaborators from the University of California, Berkeley and the Chinese University of Hong Kong. Their paper addressed a fundamental worry for almost everyone during the pandemic: Money. Specifically, they examined how people in the U.S. saved money in response to COVID-19.
Copying gender practices from MNCs is good for business
Copying gender practices from MNCs is good for business
In their study “Do multinationals transfer culture? Evidence on female employment in China”, published in the Journal of International Economics in July 2021, authors Heiwai TANG and Yifan ZHANG show that MNC practices do impact the behaviour of local companies, and the outcome is a positive impact on the productivity of local companies.
教学和研究就是互相启发的过程 – 范亭亭博士
教学和研究就是互相启发的过程 – 范亭亭博士
求知若渴的范亭亭博士立志以大数据和数理模型探索和解释消费者的行为。在2021年12月,范博士加入我们学院任职市场学高级讲师。
以跨学科知识促进数码创新及转型 – 方钰麟教授
以跨学科知识促进数码创新及转型 – 方钰麟教授
方钰麟教授是一名资深的学者、商业个案作者、资讯科技顾问,同时亦在顶尖的国际期刊担任编辑。看中了港大经管学院拥有成为学界超新星的潜力,方教授有意贡献自己在数码创新和转型方面的知识,助学院更上一层楼。于2021年9月正式加入港大后,方教授将会领导我院新成立的数字经济和创新研究所。
在资讯科技的前沿上推陈出新 – 李哲鹏博士
在资讯科技的前沿上推陈出新 – 李哲鹏博士
「与其为个人创造财富,不如为世界创造改变」是李哲鹏博士的格言。李博士一直致力透过学术研究推动资讯科技和机器学习的创新和进步。
研究企业之间的协调行为 – 郝宇博士
研究企业之间的协调行为 – 郝宇博士
计算机编程听起来好像和经济风马牛不相及,但拥有出色的编程技术,不但能帮助个人进行经济学学术研究,更能助你在商界捉紧更多就业机会。

构想虚拟货币的未来 – 游杨博士
构想虚拟货币的未来 – 游杨博士
作为教师,在鼓励同学努力学习之余,我亦会主动了解本地市场运作以及邀请雇主来到课堂分享业界经验。

从量子物理学到计量市场学—党矗博士
从量子物理学到计量市场学—党矗博士
理科出身的我,非常欣赏同学们的商业触觉。作为他们的师长,在教导他们使用数理工具作出科学判断的同时,我亦希望能够鼓励他们爱上学习,保持对未知事物的好奇心,应用课堂所学到的知识为社会做出贡献。

无差异曲线与产品设计策略
无差异曲线与产品设计策略
无差异曲线图是一个经济学工具,分析消费者如何将固定的预算分配在不同的产品上,从而达到最大的效益,相信曾修读经济学的读者会对以下的典型无差异曲线图感到熟悉。
打造香港成ESG都会 迈向零碳经济
打造香港成ESG都会 迈向零碳经济
「环境、社会及管治」(Environmental, Social, and Governance;简称ESG)近年成为全球热门话题。近日环球金融市场备受时局动荡影响,市民因受「息诱」,对绿色债券趋之若鹜,但对其背后意义及对经济的影响,到底有多少认识?
高通胀时代来临
高通胀时代来临
这两天是美国联储局公开市场委员会议息的日子,市场一般预期联邦基金利率会上调0.5厘。如果属实,将会是联储局自2000年3月以来首次作半厘幅度的加息。在过去22年间,若联储局决定加息,每次都只会增加0.25厘的息率,反映是次决策的不寻常。除息率外,市场也关注联储局什么时候开始「缩表」,也就是减少债券持有量。众所周知,这些关注都源于美国通胀率持续按月攀升,从去年3月的2.6%(按年)增加至本年3月的8.5%。
无差异曲线与产品设计策略
无差异曲线与产品设计策略
无差异曲线图是一个经济学工具,分析消费者如何将固定的预算分配在不同的产品上,从而达到最大的效益,相信曾修读经济学的读者会对以下的典型无差异曲线图感到熟悉。
Hong Kong Becomes World’s Must-Watch Market as Easy Money Ends
Hong Kong Becomes World’s Must-Watch Market as Easy Money Ends
For global investors trying to gauge the fallout from surging interest rates and slowing economic growth, Hong Kong is quickly emerging as a must-watch market. Perhaps nowhere else is as exposed to two of the biggest worries roiling global asset prices -- the Federal Reserve’s rapidly tightening monetary policy and China’s sputtering economy.

香港經濟:「驚濤駭浪」的一季度GDP收縮4% 復蘇面臨諸多限制
香港經濟:「驚濤駭浪」的一季度GDP收縮4% 復蘇面臨諸多限制
5月13日香港特區統計處發佈一季度本地生產總值(GDP),同比收縮4%,中斷了過去連續四個季度的復蘇勢頭。香港財政司司長陳茂波形容,2022年第一季度充滿驚濤駭浪,第五波疫情對經濟造成沉重打擊。