Professor Jason Ferris

@jasonferris22.bsky.social

Substance Use (alcohol and other drugs) Epidemiologist, Harm Reduction Advocate, Data Scientist, Collaborative 😊

We are looking for volunteers who have worked in or socialised in nightlife venues in Liverpool in the past 12 months to take part in a study exploring how bar staff and patrons observe or experience prejudice and violence towards LGBTQIA+ people and their willingness to intervene. DM for info.

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We are hosting two workshops preceding the #ISSDP2025 Manchester UK conference. Join the Methods Matter workshop on 10 June 2025 to hear from world leading #DrugPolicy scholars showcasing the latest methods in drug policy research today & how to improve your own research practice!

Alex Stevens@profalexstevens.bsky.social · last yr.

Sign up for the 'Methods Matter' workshop on methods in drug policy research on 10th June in Manchester. #issdp2025 www.issdp.org

Hot off the press! 📣📣In this tutorial we illustrate available multiple imputation approaches for handling longitudinal data including when they are clustered within higher level clusters. A reproducible example with R and Stata code provided! #OpenAccess onlinelibrary.wiley.com/doi/10.1002/...

Multiple Imputation for Longitudinal Data: A Tutorial

Longitudinal studies are frequently used in medical research and involve collecting repeated measures on individuals over time. Observations from the same individual are invariably correlated and thu....

onlinelibrary.wiley.com