Open book

The GDPO hosts supervision for a number of PhD Candidates researching areas within the drug policy sphere.  This page provides a showcase for their research.  If you are interested in collaborating with, employing, or otherwise contacting any of the researchers featured on this page, please email 


Heloísa Broggiato

Supervisor: Professor David Bewley-Taylor

Title: Access to medical opioids as a human right and the barriers and tensions on international drug control system

Home institution: Swansea University
Bio:  Heloísa Broggiato Matter has been researching the access to medical opioids as a human right in the context of the international drug control system, since 70% of the world's countries have lack of access to these substances. This work explores changes and tensions in the international drug control system, between 2009 and 2019, and how they affected access to medical opioids, particularly in Brazil. Heloísa holds a MA in International Politics and Security Studies from the University of Bradford, UK, a BA in Journalism from the Pontifícia Universidade Católica de São Paulo (PUC) and a BA in Social Sciences by the University of São Paulo (USP).She is a journalist, with more than 15 years of experience in Brazilian and Swiss leading media and communication companies.
  • twitter @HBroggiato
  • e-mail: 

Picture of Joe Dixon

Joe Dixon

Supervisor: Professor David Bewley-Taylor

Title: Afghanistan's Wicked Problems: Counterinsurgency and Counternarcotics between 2002 and 2011

Home Instituion: Swansea University

Bio: Joe has an undergraduate degree in War and Society from Swansea. The work for his PhD dissertation focused on tensions between counterinsurgency and counternarcotics in Afghanistan between 2002 and 2011. The research was highly interdisciplinary in nature, drawing on behavioural science, anthropology, history, and other fields not typically considered in discussions of drug control (especially in producer countries).

Picture of Martin Horton-Eddison

Martin Horton-Eddison

Supervisor: Professor David Bewley-Taylor

Second Supervisor: Professor Alan Collins

Title: Crypto-Drug Markets: A Unique Challange to the Global Drug Prohibition Regime?

Home Institution: Swansea University

Bio: Martin holds an MA (Distinction) in International Politics from Hull, and a BScEcon (Hons) in International Politics and Strategic Studies from Aberystwyth.  He has attracted full scholarships at both Hull and Swansea.  Martin's Ph.D. is entitled "Crypto-Drug Markets: A Unique Challange to the Global Drug Prohibition Regime?" His research investigates the transnational crypto-drug market phenomena and the (potential) associated challenges for drug control policy.  His work seeks to quantify to what extent CDMs impact the international prohibition regime, national prohibition policies, and state enforcement strategies. His research operates within, and contributes to, IR Regime Theory, and interesects with questions regarding the ongoing primacy of the state in the international system, traditional conceptions of identity, and international and domestic legal juristications.