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Jon Mellon

@jonmellon.bsky.social

Co-director British Election Study. Political Scientist and Data Scientist. Political science methods/political behavior/causal inference. Posts do not represent employer.

3,029 Followers  |  2,617 Following  |  682 Posts  |  Joined: 20.09.2023  |  2.1459

Latest posts by jonmellon.bsky.social on Bluesky

To make it worse, it then failed to fix the issue 4 times in a row

04.12.2025 17:35 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Gemini3-pro has a weirdly condescending personality.

04.12.2025 17:35 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Even my childless colleagues are all sick!

03.12.2025 15:28 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Does anyone else feel like there’s a lot more respiratory diseases going around this winter? Is there any data backing this up or is everyone I know unusually unlucky?

03.12.2025 14:06 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Well aware this makes me the biggest 37 year old dad cliche

30.11.2025 22:40 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

This was the last book we read. Also a big thumb up from me

30.11.2025 20:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

My favorite non-fiction book of all time

30.11.2025 20:05 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I loved the power broker but committing to the full LBJ books might be a tough sell for the group

30.11.2025 18:25 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

Also very happy to read older books. Good histories have staying power

30.11.2025 18:13 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This looks really interesting!

30.11.2025 18:11 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Popular or academic suggestions welcome!

30.11.2025 18:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I’ve been running a history book club for the last few months. What are everyone’s favorite history books?

30.11.2025 18:03 β€” πŸ‘ 20    πŸ” 3    πŸ’¬ 28    πŸ“Œ 2

Definitely a totally unbiased list

30.11.2025 17:48 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Non fiction

Making of the atomic bomb
Against the grain
The vital question
The prize: the epic quest for oil money and power
Electoral shocks: the volatile voter in a turbulent world
Destiny disrupted: a history of the world through islamic eyes

Fiction
Hyperion
Children of time

30.11.2025 17:48 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

It’s a real job! But sadly it actually involves things making classifications of diseases and medicines

22.11.2025 12:35 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I think there’s a case for teaching Bayesian stats as the default and all the frequentist procedures as helpful estimators for a special case of uniform priors

19.11.2025 13:44 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

One day I want to create a wrapper package for lm called uniform_prior_lm that does nothing but relabel CIs and p-values as their Bayesian equivalents.

19.11.2025 13:40 β€” πŸ‘ 9    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Does it behave well in the context of a few very large confounders?

15.11.2025 18:18 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I actually don’t know. I need to get more up to speed with double ML and how it relates to these problems. My gut reaction is that it wouldn’t solve it, but I trust simulations more than my gut

15.11.2025 16:26 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
A meme with two panels. In panel 1 the woman looks disgusted. In panel 2 intrigued.

Text, panel 1: fake data.

Text, panel 2: silicon sample

A meme with two panels. In panel 1 the woman looks disgusted. In panel 2 intrigued. Text, panel 1: fake data. Text, panel 2: silicon sample

01.10.2025 12:06 β€” πŸ‘ 33    πŸ” 12    πŸ’¬ 1    πŸ“Œ 1

I might just take you up on that. Will chat to Ben!

23.10.2025 12:42 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I would like to get back to this but that paper is currently in stasis

23.10.2025 02:48 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

When I was 17 I really enjoyed the Pig that Wants to Be Eaten. No idea how it holds up

13.10.2025 21:46 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Camus clearly never had to work out what was wrong with district level outcomes at the 2007 Burkina Faso legislative elections

13.10.2025 13:18 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1
Preview
If you have two measures of the same confounder, you can just include both of them in your regression model Sometimes, researchers worry about multicollinearity in situations where it’s actually a non-issue. Here’s one such scenario. Imagine a situation where you are interested in the effect of X on Y (X...

New blog post!

Let's say you have two measures meant to capture the same confounder. They're highly correlated. Can you still proceed with your regression analysis?

(I admit, the title is a bit of a spoiler)

www.the100.ci/2025/10/13/i...

13.10.2025 13:14 β€” πŸ‘ 140    πŸ” 43    πŸ’¬ 12    πŸ“Œ 8
Post image 09.10.2025 21:59 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Has anyone had success stories (or can point me to writeups) with fine tuning frontier LLMs?

03.10.2025 16:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Education? Completed it, mate.

Last week, I defended my PhD thesis and am now a doctor!

Thank you to @robfordmancs.bsky.social and @jonmellon.bsky.social for being great supervisors for 4 years

And thanks to @sarahobolt.bsky.social and Ed Fieldhouse for their interesting feedback and discussion

29.09.2025 10:56 β€” πŸ‘ 83    πŸ” 3    πŸ’¬ 11    πŸ“Œ 1

These are continuous not discrete variables and every commentary on this is assuming different cutpoints

28.09.2025 14:08 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I would say that a natural parsing of β€œis it acceptable to rob a store for food?” either implies that you cannot get food in another way or is answered with an easy no

26.09.2025 21:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

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