Personal profile
Author IDs
ORCID iD: 0000-0003-0709-0777
Scopus Author ID: 57212551153
Google Scholar Profile: XvKrfvUAAAAJ
Impact
Biography
Hi, I’m Leon, an Assistant Professor at the School of Creative Media of the City University of Hong Kong. We are recruiting PhD students and research assistants.
I research and have a PhD in video game law, particularly the regulation of loot boxes, gacha, and other gambling-like monetisation mechanics in video games that offer random rewards. I am trained in English law and have been Called to the Bar of England and Wales. I use empirical legal research methods to assess whether companies are complying with various rules in different countries through fieldwork, and I advise on how compliance could be improved.
I also conduct traditional, doctrinal legal research and psychology studies, including surveys and experiments. I am passionate about open science: I preregister research methods, share data, and even conduct registered reports (including likely the first one in the world in the legal discipline). I also dabble in some research on gameplay time and videogaming ‘addiction’ and the intersections between cryptocurrencies, NFTs, gaming, and gambling.
I am actively involved in advising on policymaking across the world. I have been invited to testify before an Australian House Committee. My research has been referenced (twice!) in the House of Lords, cited by the US Federal Trade Commission and the Belgian court, and relied upon by UK, US, EU, Spanish, Dutch, Swedish, German, Austrian, Australian, and Brazilian policymakers and regulators. The Belgian Minister of Justice has publicly accepted my research critical of his government.
I put my research results into practice by making complaints against companies either through relevant regulators or directly. Through my actions, many key precedents in video game advertising regulation have been established in the UK, and companies have been fined in the EU for non-compliance. Companies and industry self-regulators have taken direct compliance and remedial actions following my research, e.g., amending the app store listings of many popular games to ensure consumer protection.
My award-winning research has received worldwide coverage in over 550 media features by The Guardian, The BBC, The Times, CNBC, NPR, RTÉ, The SMH, Ekstra Bladet, Politiken, El Español, El Economista, Der Standard, Het Nieuwsblad, HLN, RTBF, ČT24, TASS, SCMP, NME, The Daily Beast, New Scientist, Thanh Niên, and leading video game media, e.g., GamesIndustry.biz, GameSpot, IGN, Eurogamer, and Game Developer, amongst others.
I was recognised as a Forbes 30 Under 30 and a Berlingske Talent 100 for my policy advocacy.
I have won multiple research and impact awards, a prestigious Danish grant, and multiple ECR grants, totalling over £71,000 in value. Current projects focus on using EU law (e.g., the Digital Services Act) to scrutinise gambling and video game advertising using social media ad repositories. I also hope to use data protection law (e.g., the GDPR) to access research data that the industry refuses to share publicly fearing that the results will be contrary to their commercial interests.
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
-
SDG 3 Good Health and Well-being
-
SDG 8 Decent Work and Economic Growth
-
SDG 9 Industry, Innovation, and Infrastructure
-
SDG 12 Responsible Consumption and Production
-
SDG 16 Peace, Justice and Strong Institutions
Fingerprint
- 1 Similar Profiles
Collaborations from the last five years
Research output
-
Breaking Ban: Belgium’s Ineffective Gambling Law Regulation of Video Game Loot Boxes
Xiao, L. Y., 2023, In: Collabra: Psychology. 9, 1, 57641.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile46 Link opens in a new tab Citations (Scopus)329 Downloads (CityUHK Scholars) -
Gaming the system: suboptimal compliance with loot box probability disclosure regulations in China
Xiao, L. Y., Henderson, L. L., Yang, Y. & Newall, P. W. S., Jul 2024, In: Behavioural Public Policy. 8, 3, p. 590-616Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile42 Link opens in a new tab Citations (Scopus)121 Downloads (CityUHK Scholars) -
Loot boxes, gambling-related risk factors, and mental health in Mainland China: A large-scale survey
Xiao, L. Y., Fraser, T. C., Nielsen, R. K. L. & Newall, P. W. S., Jan 2024, In: Addictive Behaviors. 148, 107860.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile21 Link opens in a new tab Citations (Scopus)91 Downloads (CityUHK Scholars) -
Illegal loot box advertising on social media? An empirical study using the Meta and TikTok ad transparency repositories
Xiao, L. Y., Apr 2025, In: Computer Law and Security Review. 56, 106069.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile5 Link opens in a new tab Citations (Scopus)65 Downloads (CityUHK Scholars) -
Failing to protect the online consumer: poor compliance with Dutch loot box and video game consumer protection guidelines
Xiao, L. Y., 10 Jul 2025, (Online published) In: International Journal of Law and Information Technology. 33, 36 p., eaaf011.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile1 Link opens in a new tab Citation (Scopus)43 Downloads (CityUHK Scholars)
Projects
- 1 Active
-
REG-Small Scale: How Can We Accurately Measure Video Game Players’ Use of Gambling-Like Loot Boxes in Surveys?
XIAO, L. Y. (Principal Investigator / Project Coordinator) & EBEN, C. (Co-Investigator)
1/05/26 → …
Project: Research
Prizes
-
Fred Yates Prize for Early Career Researchers
XIAO, L. Y. (Recipient), 2025
Prize: RGC 64B - Prizes and awards
-
Stanford's top 2% most highly cited scientists 2025
XIAO, L. Y. (Recipient), Sept 2025
Prize: RGC 64B - Prizes and awards
Impacts
-
20220601 - Cited in the Australian Institute of Family Studies report
XIAO, L. Y. (Participant)
Impact
-
20220813 - Research cited and accepted by Belgian Minister of Justice
XIAO, L. Y. (Participant)
Impact
Press/Media
-
Top-selling mobile games break rules on loot boxes
29/11/24
1 item of Media coverage
Press/Media: Press / Media
-
Gender pay gap, 'Spicy' fiction, Is rugby safe? Labubu dolls.
26/08/25
1 item of Media coverage
Press/Media: Press / Media
-
Video game firms found to have broken own UK industry rules on loot boxes
29/03/24
1 item of Media coverage
Press/Media: Press / Media
-
-
Leon Xiao, el sabio que desmonta la nueva ley sobre videojuegos: "Los niños no están protegidos" [Leon Xiao, the wise man who dismantles the new law on video games: "Children are not protected"]
30/06/24
1 item of Media coverage
Press/Media: Press / Media
Activities
-
Child & Teen Consumption Conference (CTCC 2026)
Voorveld, H. (Panelist), Dighton, G. (Panelist), Xiao, L. (Panelist), Rossi, R. (Panelist) & Moradipour, S. (Panelist)
22 Apr 2026 → 24 Apr 2026Activity: Organizing or Participating in a conference / an event › Workshop / Seminar / Course
-
Child & Teen Consumption Conference (CTCC 2026)
XIAO, L. Y. (Organiser) & REN, X. (Organiser)
22 Apr 2026 → 24 Apr 2026Activity: Organizing or Participating in a conference / an event › Workshop / Seminar / Course
-
DiGRA 2025 – Early Career and Precarious Positions Showcase
Petrovskaya, E. (Speaker) & XIAO, L. Y. (Speaker)
4 Jul 2025Activity: Talk/lecture or presentation › Presentation
-
Games: Research and Practice (Journal)
XIAO, L. Y. (Co-Editor)
Jul 2025 → 2026Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor
-
DiGRA 2026 (Event)
XIAO, L. Y. (Academic Editor)
2025 → 2026Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor