Crémieux Profile picture
Apr 11, 2023 9 tweets 3 min read Read on X
As pit bulls have become more common, their representation in dog fatalities has grown, as have the per capita rates of dog fatalities and injuries. Chart showing the proportio...
In 1979-1998, pit bulls were a quarter as common as now, but they were still responsible for a large % of deaths. The premiere "aggressive dog" at the time was the Rottweiler, and despite its reputation, bad owners, and far greater numbers, it didn't kill as many as the pit bull. Image
And this isn't due to mix-ups. We used to have data separating purebred pit bulls from crossbred ones.

Crossbred pit bulls are fortunately now more common, but they used to be the less common variety. It's fortunate because the mixing means less violence per dog. Image
More recently, in the deadliest states with respect to dog attacks, it's clear that pit bulls are to blame for most dog fatalities. Image
A major part of why pit bulls are such outliers is that, where we have data, it appears they kill people at a wider - older - range of ages.

52% of all dog fatalities are of people ≥10 while 72% of pit bull fatalities are, versus 28% for the ~94% from all other breeds combined Image
Despite aggressive dogs and bad owners being a thing forever, the switch from Rottweilers and the like to the pit bull has been destructive for this reason

Dog fatalities used to be a problem for children alone, but due to pit bulls they are now largely a problem for people ≥10 Image
Pit bulls are not deadly because they're strong. Many breeds are stronger. They are deadly for the reason fighters want them: tenacity.

"Pit Bull" here is a mix, but the broader label applies to the APBT, American Staffordshire Terrier, and the Staffordshire Bull Terrier. Image
This is something that's difficult for police to get dogs to adopt through the rigorous training they're subjected to. Most fail! Because it's been bred into pit bulls, it's much more reliably observed in that breed.

Other BSL'd breeds are also often extremely tenacious.
Here's a previous post with the relative risks of fatalities by breed.

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More from @cremieuxrecueil

Oct 31
The CDC's new Advisory Committee on Immunization Practices (ACIP) didn't put out immunization guidance for 2025-26.

So some researchers got together and did the government's job for them. Here's what they found🧵

First, the RSV vaccine is great for preventing hospitalization! Image
The next thing up is the flu vaccine.

These are still showing a touch lower efficacy than in previous years, but they're still

(1) good
(2) worth it
(3) even more worth it for infants and children Image
Then we have the COVID vaccines, which still seem to be useful enough to save a lot of lives.

These are also still better for the old.

That's good! Image
Read 6 tweets
Oct 27
How rich are American workers?

Very!

After accounting for taxes, transfers, cost of living differences and so on, American workers make far more than their counterparts across the OECD. Image
Is this just because Americans work more?

No. That has something to do with it for some comparisons, but it's not everything.

Americans are also more productive and they get to take home more of what they earn. Image
This is an update on the 2021 numbers I previously presented here: x.com/cremieuxrecuei…, x.com/cremieuxrecuei…, x.com/cremieuxrecuei…

When we have 2024 numbers or later numbers, I'll update to those. But we have to wait on the OECD to release that data, so until then, enjoy!

Here's the old style plots if you want those:Image
Image
Read 4 tweets
Oct 27
Wow!

Across basically all of Europe, people at higher income levels are now *more likely* to become parents!

This is a stunning shift! Image
Among men, this relationship goes a while back now, and in several places, the income gradient has gotten more extreme. Image
Among women, there are some recent crossover events, where the low-income used to be more likely parents than the rich, but now it's different. Image
Read 6 tweets
Oct 26
Wolf packs are remarkably good at respecting each other's established borders. Image
The project this data is from sometimes releases videos of how this plays out.

For example, here's a video of this playing out for a few wolves over a single day in Spring.
Alternatively, about 10-20% of wolf populations lack a pack. They're "lone wolves" and they're more likely to just wander across the territory of different packs

But this isn't permanent! Apparently this one eventually joined a pack and changed his long-distance traveling habit!
Read 6 tweets
Oct 23
Air traffic control has a major problem in the pipeline.

ATCs are underpaid and overworked.

99% of control towers were understaffed in 2023 and the number of communication mishaps and near-misses between commercial aircraft skyrocketed.

I think the solution might be drones🧵 Image
You might think: Wait, haven't drones been smashing into planes recently? How are they going to help?

That's true! I've attached some pictures of drone-related damage. It's real and getting worse, I'll give you that.

The answer lies in drone communication.Image
Image
Image
Image
Drones don't yet, but they can start to, constitute a low-level communication and monitoring layer around airports and other protected airspace.

Drones can relay information about the locations of other drones, obstacles, incoming planes, and so on. Image
Read 16 tweets
Oct 22
The story of peanut allergy is entering its final chapter.

Nowadays, we are beating back both peanut and other food allergies, and all it took was telling parents the right thing to do🧵 Image
The story begins in 2000, when the American Academy of Pediatrics decided to issue some simple advice to parents: Have your kids avoid peanuts early in life. Don't expose them until they're at least three!Image
Parents complied. It turns out, they do that. They just follow advice from professional associations that appear to have authority.

So peanut allergy rates rose, from 0.4% in 1997 to 1.4% in 2008, to 2% in 2015.

But if the advice was right, the opposite should've happened!
Read 13 tweets

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