Andrew Bell
andrewjdbell.bsky.social
Andrew Bell
@andrewjdbell.bsky.social
Senior Lecturer in Quantitative Social Sciences, University of Sheffield. Multilevel models, age period cohort, Intersectionality, etc https://linktr.ee/andrewjdbell
Pleased to see this out in print - detailing MAIHDA's desirable statistical properties.

"MAIHDA is especially valuable when inequalities are subtle or data for marginalised intersections are sparse - conditions common in practice"

journals.sagepub.com/doi/10.1177/...

@clarerevans.bsky.social
The Statistical Advantages of Multilevel Analysis of Individual Heterogeneity and Discriminatory Accuracy for Estimating Intersectional Inequalities - George Leckie, Andrew Bell, Juan Merlo, SV Subram...
Multilevel Analysis of Individual Heterogeneity and Discriminatory Accuracy (MAIHDA) is a multilevel regression approach grounded in intersectionality theory. I...
journals.sagepub.com
October 22, 2025 at 4:00 PM
Want to know how to use MAIHDA to examine heterogeniety in policy outcomes? Here's a nice worked-through example!

How does intersectional identity impact preference for in-person vs online GP appoinments?

Has been great working with @healthfoundation.bsky.social colleagues on this :)
October 16, 2025 at 8:38 AM
Reposted by Andrew Bell
Now officially out with nice formatting and all 🥳 "Thinking clearly about age, period, and cohort effects" -- a gentle introduction to the age-period-cohort problem and how to "solve" it through various types of assumptions.

journals.sagepub.com/doi/10.1177/...
June 6, 2025 at 7:38 AM
Reposted by Andrew Bell
NCRM has opened applications to participate in the Research Methods Rendezvous!

This free event will explore the process of turning early-stage ideas into #research projects.

#RMR2025 takes place online on 10 September and 29 October 2025.

Apply: www.ncrm.ac.uk/training/RMR...
June 5, 2025 at 9:02 AM
Reposted by Andrew Bell
Thanks to everybody who chimed in!

I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.

So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>
May 11, 2025 at 5:34 AM
Reposted by Andrew Bell
Our research on the effects that PIP changes could have on local economies, written by authors @nataliecbennett.bsky.social @profbambra.bsky.social & @lukemunford.bsky.social, was featured on the @itvpeston.bsky.social programme last night - you can watch the episode on catch up
Join ITV’s Flagship Politics show

Tonight Robert Peston and Anushka Asthana will be joined by:

🌹 Gordon Brown
🇪🇺 Pedro Serrano
💼 Sir Charlie Mayfield
🏴󠁧󠁢󠁳󠁣󠁴󠁿 Stephen Flynn
🔵 Gillian Keegan

#Peston

youtube.com/live/_sOdZhH...
PESTON LIVE - 21/05/2025
YouTube video by Peston
youtube.com
May 22, 2025 at 8:46 AM
Reposted by Andrew Bell
Another q for the stats people!
People worry about collinearity (cf blog post below).

Consider a scenario in which the collinear predictors are just controls to account for confounding.
Including both of them doesn't impair the precision with which the effect of interest is estimated, does it?
Jan Vanhove :: Blog - Collinearity isn’t a disease that needs curing
janhove.github.io
April 29, 2025 at 12:26 PM
Reposted by Andrew Bell
Multilevel Models: Practical Applications

Curious about multilevel modelling but not sure where to start?

Learn to recognise, build & interpret multilevel models using MLwiN or R, through real-world examples & hands-on practice.

Find out more: bit.ly/3Yj5I4f

#ESS2025
April 11, 2025 at 1:37 PM
Still time to apply for this RA post- developing and applying the intersectional MAIHDA approach with @clarerevans.bsky.social and others. If you're a quantitative social scientist with an interest in quantitative methods and methods development, please apply! DMs open www.jobs.ac.uk/job/DMR190/r...
April 29, 2025 at 8:50 AM
Come join George and I in Bristol, to learn about intersectional MAIHDA! bristol.ac.uk/cmm/software... @ncrm.ac.uk
March 4, 2025 at 2:50 PM
Reposted by Andrew Bell
It’s my first project too! In fact, it’s also my first in epidemiology since I come from philosophy. :) I find stratified graphs based on social categories (like Hernández-Yumar, 2018) really interesting.
November 22, 2024 at 1:09 PM
Reposted by Andrew Bell
A little story about this article & how teachers make a difference:

In 2013, I was a student in a social epidemiology class taught by the esteemed David Williams. He observed, with some frustration while we looked at a series of graphs, that we often lump people into the “Hispanic” category — 1/
February 14, 2025 at 1:03 AM
George Leckie and I have created a new short MAIHDA tutorial, with videos and practical exercises:

www.ncrm.ac.uk/resources/on...

It's based on our tutorial paper in SSM Pop Health, but shorter and more interactive.

Hope it's helpful! @ncrm.ac.uk
NCRM resource | Multilevel models to study intersectionality by Andrew Bell and George Leckie
Multilevel models allow researchers to analyse data that has a clustered structure such as pupils nested within schools, or individuals within neighbourhoods. Recently, a version of multilevel models
www.ncrm.ac.uk
January 30, 2025 at 12:33 PM
Reposted by Andrew Bell
Reposted by Andrew Bell
New paper published in Social Science and Medicine 'An analysis of intersectional disparities in alcohol consumption in the US'. Led by @sophiebright.bsky.social, this study identifies several understudied groups who may have higher alcohol consumption than traditional methods would suggest.
An analysis of intersectional disparities in alcohol consumption in the US
Alcohol is one of the leading causes of preventable deaths in the United States (US). Prior research has demonstrated that alcohol consumption and rel…
www.sciencedirect.com
November 19, 2024 at 11:23 AM
Reposted by Andrew Bell
New preprint! osf.io/preprints/ps...
The age-period-cohort problem is something that many researchers are vaguely aware of. There have been very cool advances in how to reason about it which don't seem to be well-known in psych. So, I've written a primer!
September 19, 2024 at 8:52 AM
Reposted by Andrew Bell
Rereading @andrewjdbell.bsky.social's 2020 paper on APC analysis & this is such a great example of how plots imply certain interpretations of the data.

Same underlying data but depending on how you connect the lines, the implied age effect looks completely different.
June 24, 2024 at 8:54 AM