學術論文
研究焦點
全球學者
知識轉移
明德商論
龍虎山下
媒體報導
Logic-based updating
Logic-based updating
We build on AGM belief revision (Alchourrón et al. (1985)) and propose a class of updating rules called pragmatic rules. Pragmatic updating applies to multiple priors and requires that the agent's posteriors be the subset of her priors under which the realized event occurs with probability 1, if such priors exist. We construct a propositional language based on qualitative probability and demonstrate the strong relation between belief updating rules and belief revision rules in this language. We show that an updating rule is consistent with AGM belief revision if and only if it is pragmatic. While maximum likelihood updating is pragmatic in general, full-Bayesian updating is not. We characterize maximum likelihood updating within the AGM framework, and show that full-Bayesian updating can be obtained by dropping one of AGM's postulates.

Learning from a black box
Learning from a black box
We introduce a learning model in which the decision maker does not know how recommendations are generated, called the contraction rule. We present behavioral postulates that characterize it. The contraction rule can be uniquely identified and reveals how the decision maker interprets and how much she trusts the recommendation. In a dynamic stationary setting, we show that the contraction rule is not dominated by completely following recommendations and is incompatible with a property called compliance with balanced recommendations. Following this negative result, we demonstrate that the contraction rule may generate and reinforce recency bias and disagreement.

Growing user base in the early stage of sharing economy platforms: An integration of competitive repertoire and institutional legitimacy theories
Growing user base in the early stage of sharing economy platforms: An integration of competitive repertoire and institutional legitimacy theories
Sharing economy platforms are pressed to rapidly grow user bases at the early stage by aggressively targeting potential users through competitive actions. Due to the volatile nature of the sharing economy and its disruption to industry norms, these platforms encounter legitimacy challenges that impede user base growth. This paper integrates competitive repertoire and institutional legitimacy theories to develop a research model that explains early-stage user base development in the sharing economy. We posit that the early-stage user base is associated with structural characteristics of the competitive repertoire, whose effects are moderated by a platform's socio-political legitimation efforts that address stakeholders’ regulatory and normative concerns. Using a comprehensive sample of 4644 monthly observations of 129 sharing economy platforms in China, we find that the volume of two context-specific competitive actions, offering economic incentives and staging high-visibility events, along with competitive repertoire complexity, are positively related to the platform's early-stage user base. We also identify a significant negative relationship between repertoire differentiation and user base. Direct relationships are moderated by socio-political legitimation, however, such that legitimation weakens the positive impact of context-specific action volume but enhances those of repertoire complexity and differentiation. Managerial and practical implications are discussed in light of the findings.

春節幸福感和疫情感知風險調查:來自機器學習的洞察
春節幸福感和疫情感知風險調查:來自機器學習的洞察
2023年剛結束的兔年春節內地民眾過得怎樣?調查顯示,兔年春節期間,民眾的幸福感平均值為5.47,介於“比較開心”與“開心”之間(1為最低值,7為最高值),“比較開心”以上人群占比為83.1%。
How to Recover from Work Stress, According to Science
How to Recover from Work Stress, According to Science
To combat stress and burnout, employers are increasingly offering benefits like virtual mental health support, spontaneous days or even weeks off, meeting-free days, and flexible work scheduling. Despite these efforts and the increasing number of employees buying into the importance of wellness, the effort is lost if you don’t actually recover. So, if you feel like you’re burning out, what works when it comes to recovering from stress? The authors discuss the “recovery paradox” — that when our bodies and minds need to recover and reset the most, we’re the least likely and able to do something about it — and present five research-backed strategies for recovering from stress at work.

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.
研究企業之間的協調行為 – 郝宇博士
研究企業之間的協調行為 – 郝宇博士
計算機編程聽起來好像和經濟風馬牛不相及,但擁有出色的編程技術,不但能幫助個人進行經濟學學術研究,更能助你在商界捉緊更多就業機會。

疫況愈下 「清零」何價?
疫況愈下 「清零」何價?
香港在連續數月「清零」後,在社區出現Omicron變種病毒個案,爆發第五波疫情,特區政府因而重新推出表列處所須關閉等社交距離防疫措施,並取消多項大型活動。
構想虛擬貨幣的未來 – 游楊博士
構想虛擬貨幣的未來 – 游楊博士
作為教師,在鼓勵同學努力學習之餘,我亦會主動了解本地市場運作以及邀請僱主來到課堂分享業界經驗。

香港通往成為國際Web3.0中心的路徑
香港通往成為國際Web3.0中心的路徑
在過去十年,兩大科技一直引領數位革命。 首先是人工智慧(AI),它已在全球得到了廣泛應用,其次是備受爭議的Web3.0,這是一種去中心化的區塊鏈協定。 本文將重點探討Web3.0的發展,並進行深度解讀。
探究寧夏葡萄酒産業的ESG實踐
探究寧夏葡萄酒産業的ESG實踐
寧夏近年來成為中國出產葡萄酒的重要基地,該區釀酒量佔國產酒莊總量近半。寧夏各個酒莊不僅帶動了當地經濟發展,還成為中國葡萄酒行業的ESG先鋒,積極推動可持續農業、生物多樣性、綠色經濟以及當地文化保護。
數字平台有偏見 草根經濟難創新
數字平台有偏見 草根經濟難創新
數字平台通過降低消費者的搜索成本,有助於知名度不高的文化工作者找到知音,讓在傳統市場乏人問津的產品能以較低成本進入市場,令市場百花齊放。然而,在「流量為王」的時代,平台運營日趨偏頗,尤其是在中國的數字文藝娛樂市場,平台的推送和操縱能決定一部作品的命運,甚至窒礙產業創新。
香港經濟三大挑戰與四條出路
香港經濟三大挑戰與四條出路
香港經濟自二戰後儘管經歷多次起伏,其國際金融及貿易中心地位,依然在世界經濟舞台上歷久不衰。然而,面對近年全球經濟增長放緩、區域競爭激烈及地緣政治局勢惡化,香港作為高度外向型的自由經濟體,我們不能因為過去均能化危為機便心存僥幸。時移世易,香港現時面對人口老化等諸多內憂,加上外部挑戰,未必如昔日般「耐寒」。
AI衝擊環境 碳排放有何轉機
AI衝擊環境 碳排放有何轉機
今時今日,人工智能(AI)技術突飛猛進,從智能助手到自動駕駛,從工業生產到醫療診斷,AI的應用已深入人類生活的方方面面。根據國際數據公司(International Data Corporation)預測,全球AI市場規模將從2022年的1324億美元增長到2027年的5124億美元。
當AI敲門 音樂產業命運何去何從?
當AI敲門 音樂產業命運何去何從?
今天當我們戴上耳機聆聽音樂時,會否意識到超過30%的音樂已經是由AI生成的?從去年一首AI生成歌曲Heart on My Sleeve在Spotify上一舉獲得逾2000萬的點擊,到今年年初,最大唱片公司環球唱片(Universal Music)因為AI音樂泛濫,而把旗下所有音樂從最大手機短視頻平台TikTok上撤銷,再到今年年中環球唱片和TikTok達成協議,後者同意在所有AI音樂視頻上加上「AI音樂」的標籤,AI技術對音樂產業的影響來勢洶洶。
香港經濟三大挑戰與四條出路
香港經濟三大挑戰與四條出路
香港經濟自二戰後儘管經歷多次起伏,其國際金融及貿易中心地位,依然在世界經濟舞台上歷久不衰。然而,面對近年全球經濟增長放緩、區域競爭激烈及地緣政治局勢惡化,香港作為高度外向型的自由經濟體,我們不能因為過去均能化危為機便心存僥幸。時移世易,香港現時面對人口老化等諸多內憂,加上外部挑戰,未必如昔日般「耐寒」。
境外公司駐港新高 9960間 增10%
境外公司駐港新高 9960間 增10%
港大經管學院副院長(對外事務)鄧希煒教授表示,由於地緣政治因素,加上內地本土市場過度競爭,不少當地龍頭企業希望「出海」開拓市場。他舉例,近期來港掛牌的美的集團(00300)及順豐(06936)在內地上市多年,擇此時機在港掛牌,希望作全球部署。他直言,若只在上海或北京設置總部,內地資本管制下,資金較難投資外地,「幾十億資金難以到馬來西亞或越南」;以香港作為地區總部,就可集資及投資外地市場,擴展商業版圖。

香港通往成為國際Web3.0中心的路徑
香港通往成為國際Web3.0中心的路徑
在過去十年,兩大科技一直引領數位革命。 首先是人工智慧(AI),它已在全球得到了廣泛應用,其次是備受爭議的Web3.0,這是一種去中心化的區塊鏈協定。 本文將重點探討Web3.0的發展,並進行深度解讀。