Crémieux Profile picture
Sep 23 7 tweets 3 min read Read on X
The FBI has finally released crime statistics for 2023!

Let's have a short thread.

First thing up is recent violent crime trends: Image
Now let's focus in on homicides.

The homicide statistics split by race show the same distribution they have for years. Image
As with every crime, it's still men doing the killing, but it's also largely men doing the dying. Image
What about Hispanics? Their data is still a mess, but here it is if you're interested. Image
The age-crime curve last year looked pretty typical. How about this year?

Same as always. Victims and offenders still have highly similar, relatively young ages. Image
Everything else, from locations to motives to weapons is pretty similar to previous years. What's different is that the OP might show incorrect numbers.

For the past two years, the FBI has silently updated their numbers after about two weeks.

You can use the web archive to see that the data from the OP is the data shown at release last year, and the data from 2023 is the 2022 data with the FBI's suggested reductions (i.e., -11.6% homicides, -2.8% aggravated assaults, -0.3% robberies, etc.).

But you can see on their site now that they've adjusted the numbers up, so the reduction they suggested has brought us down to a figure that's less impressive than my chart shows. The difference isn't huge so I showed the OP without updating to their new data.

For reference, 2022 as reported then had a homicide rate of 6.3/100k, and they silently updated that to 7.48/100k. The 2023 data they provided today actually has a murder rate of 6.61/100k, higher than last year's initially-reported number, but lower than the updated number. To make matters worse, if you use their Expanded Homicides Report, you get a rate of 5.94 for 2022 and 5.24 for 2023.

Methodology matters and we get to see inconsistency in this year's data, not even data that's been updated or anything. It's a mess, so take everything with a grain of salt and, in the interest of caution, only interpret trends. Trends are mostly common between all data sources even if the absolute magnitudes are off, constantly updated, etc.

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More from @cremieuxrecueil

Dec 20
Psychotic people follow scripts.

Let's talk about the glass delusion, the Middle Ages' bout with a mass psychogenic illness marked by people believing they were made of glass. Image
Glass was a valuable commodity in Europe. It was primarily owned by the noble and well-to-do, and it had a notable purpose in alchemy.

Its perception as the technology of the time was as one that's both fragile and valuable, like the nobility. Image
Glass was the relatively novel technology people knew, and they knew things could be transmuted into glass. Delusional people also thought transmutation could affect them.

Take King Charles VI.

He truly believed his body was made of glass. Image
Read 17 tweets
Dec 19
And here we have it: Daily homicide data!🧵

The massive increase in homicides in the last week of May of 2020 started in the days after George Floyd's death.Image
The Floyd Effect principally refers to the impact of George Floyd's death on homicide numbers in the U.S. through diverse mechanisms, such as reduced cooperation with police, reduced police activity, presence, and willingness to confront potential criminals, and maybe more.
The effect primarily occurred due to an increase in firearm violence that was largely isolated to African Americans. The effect is timed to the

- Year
- Month
- Week
- Day

of George Floyd's death.
Read 24 tweets
Dec 18
College students make or are forced to make suboptimal choices about the times their classes take place🧵

For students who register for 8AM classes, about a third wake up after class starts, and almost 40% wake up too late to get to class on time. Image
People's internal rhythms aren't things they just choose, they're somewhat out of their control because they're synced up with day-night cycles.

Consider this, showing the amount of time 8AM class-takers sleep on school days vs weekends (gray), measured through logins at school. Image
If you compare those 8AM class-takers to 9AM students, you see that the ones who registered for 9AM classes sleep longer, but both sleep similar lengths on weekends. Image
Read 16 tweets
Dec 16
If you're curious about the recent rise in autism diagnoses, go read this.

It details how much of the rise in diagnoses is down to diagnostic drift and increasing screening. Image
You can see the impact of this on correlations between autism and other things in the published literature:
A common retort is 'But [this] study used the same definition over time and found an increase'. That comment is usually just wrong.

What people see in those studies is almost always a combination of 1. screening more, and 2. screening less stringently even if they don't want to.
Read 5 tweets
Dec 13
The potential gains to port automation are so enormous that Trump is making a huge mistake if he goes along with wishes of the mobsters in the ILA.

The gains on the table are so large that increasing an average port's capacity by just one ship increases total trade by 0.67%. Image
Bulk freight carriers also hate waiting around. They want to take goods and get them delivered where they need to go.

But America's ports are so inefficient that bulk carriers opt to go to the wrong ports to save time.

America's roads get sacrificed to its lack of automation. Image
Want to get automated ports and make America richer?

Destroy the ILA. Don't negotiate with them, just end them outright. The easiest way to do that is to make them happy with being destroyed.

Just Pay Them Off. Image
Read 4 tweets
Dec 12
The COVID era Paycheck Protection Program was defrauded at an incredible scale. People received PPP loans for total nonsense at stunning rates.

Thread of funny claims.

Dodge Hellcat LLCImage
Reparations for Indigenous People LLCImage
Just Traffic TicketsImage
Read 26 tweets

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