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Crémieux

Apr 15

Nature finally published it!

The Reich Lab article on genetic selection in Europe over the last 10,000 years is finally online, and it includes such interesting results as:

- Intelligence has increased
- People got lighter
- Mental disorders became less common

And more!

They've added some interesting simulation results that show that these changes are unlikely to have happened without directional selection, under a variety of different model assumptions.

They also showed that, despite pigmentation being oligogenic, selection on it was polygenic.

"[S]election for pigmentation had an equal impact on all variants in proportion to effect size."

Read 9 tweets

Crémieux

@cremieuxrecueil

Apr 10

I still think this is one of the most important recent papers on AI in the job market🧵

The website Freelancer added an option to generate cover letters with AI, and suddenly the quality associated with cover letters stopped predicting the odds of people getting hired!

LLMs do a few things to cover letters.

Firstly, they increase the quality, as measured by how well tailored they are to a given job listing.

Second, they make job applications in expensive, so people start spending less time shooting off applications.

More, rapidly-produced job applications becomes the norm.

Read 8 tweets

Crémieux

@cremieuxrecueil

Apr 6

https://twitter.com/cremieuxrecueil/status/2040901759661384056

The authors of this work now have a newer study with a nine-times larger sample!🧵

The overall result is that the rich are:

- More risk-tolerant, open to experiences, extraverted, and conscientious
- Less neurotic
- No more agreeable than normal, non-rich people

https://twitter.com/cremieuxrecueil/status/2040901759661384056

Now, we have a breakdown of different types of rich people!

Among those who could be classified, the majority of the rich (79%; >=€1m net worth) were self-made, with a smaller, 21% share whose wealth came primarily from inheritances.

How do inheritors and the self-made differ in personality?

They're both more risk-tolerant and less neurotic than the average, but the inheritor profile looks like a mixture between the overall rich and normal people, with more agreeableness, less openness, etc.

Read 8 tweets

Crémieux

@cremieuxrecueil

Mar 23

Why have testosterone levels been rising over time?

The testosterone levels of American men are up compared to what they used to be, but no one has a good explanation.

Let's look through some possibilities🧵

Is it perhaps because of a racial composition change?

No.

Different races tend to have similar testosterone levels and trends within groups are similar.

Is it perhaps because of age composition change?

No.

The decline by age is much more graceful than people tend to suspect, and within each age group, levels are up without survey weighting, and in nearly all with it, they're still up.

Read 34 tweets

Crémieux

@cremieuxrecueil

Mar 13

Today's deregulatory news is pretty big.

The White House is taking aim at the housing shortage by deregulating housing construction🧵

A big part of the American Dream was created by a massive housing boom when the troops came home

Since the Great Financial Crisis, practically everywhere has reduced the number of permits they issue for new housing

This has resulted in housing cost growth outpacing wage growth:

To revive the American Dream, we need to build more homes.

If we want to build more homes, we'll have to overcome a lot of different regulatory burdens.

One step is to get rid of federal regulatory burdens that straddle homebuilders and owners with lots of random costs.

Read 10 tweets

Crémieux

@cremieuxrecueil

Mar 13

In my latest article, I documented that the only RCT for functional medicine methods appears fraudulent🧵

Before getting into it, what's functional medicine?

It's a pseudoscience used to bilk patients by getting them on an unending cycle of tests, supplements, and more tests.

Functional medicine's practitioners claim that they can reveal and treat so-called "root causes" of people's health problems

These are proposed to be things like gut health, toxin burdens, and various chemical and hormonal imbalances

They find these things with unproven tests

If you run enough tests, you will be able to find something that looks 'off' about a patient, and if you're a functional medicine doctor, that's your 'A-ha!' moment, even if—as is usually the case—the result is just a false-positive and treating it is unlikely to do anything.

Read 15 tweets

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