Crémieux Profile picture
Oct 27, 2024 12 tweets 4 min read Read on X
What does labor-saving technology do to workers? Does it make them poor? Does it take away their jobs?

Let's review!

First: Most papers do support the idea that technology takes people's jobs.Image
This needs qualified.

Most types of job-relevant technology do take jobs, but innovation is largely excepted, because, well, introducing a new innovation tends to, instead, give employers money they can use to hire people. Image
But if technology takes jobs, why do we still have jobs?

Simple: Because through stimulating production and demand, it also reinstates laborers!

This is supported by the overwhelming majority of studies:Image
This reinstatement effect is largely consistent across types of technology, with innovations still looking a bit odd.

That is the weirdest category of technology besides "other", so roll with it. Image
Now the operative question is, if workers lose their jobs and end up reinstated in other jobs, what happens to their incomes?

Well, technology introduction tends to boost incomes!Image
Across types of tech, this result is pretty consistent: studies agree, technology makes us richer! Image
But, you might ask, whose income is boosted? Because if reinstatement affects far smaller numbers of workers than replacement, some people might still be getting shafted.

Well, the net employment effects of technology are highly ambiguous:Image
If we look across types of technology the picture I mentioned above for innovation-style technology shows up again: many studies suggest it's good for employment. Image
The reason impacts on net employment are so ambiguous is because they really have to be qualified.

For example, in general, when robots cause manufacturing employment to fall, there's a compensatory effect on service-sector employment that's at least as large in magnitude: Image
What makes that impact so interesting is another way it's qualified: It's smaller in industries more at-risk of offshoring.

In other words, industrial robots save American jobs from going overseas.Image
Industrial robots also contribute directly to reshoring. In other words, when Americans buy robots to do their manufacturing, Mexicans lose their jobs.

The welfare impact for domestic workers is positive. Not so for Mexicans, but that's just how things go. Image
Overall, labor-saving technology is clearly good, and the longer we delay adopting it, the poorer we will be relative to the world in which we picked it up immediately.

Want to know more? Check out my latest article: cremieux.xyz/p/workers-for-…

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More from @cremieuxrecueil

Dec 22
The Australian pension system is funded through mandatory contributions into private retirement accounts

During the COVID pandemic, the government allowed people to pull up to $20,000 from those accounts decades early

What happened?

Firstly, uneducated people pulled the most: Image
Australia did this because they needed fiscal stimulus.

If they didn't allow people to make early withdrawals from their accounts—which normally remain inaccessible until retirement age—, they would have ended up in a very bad position.

But people did withdraw. Image
About a quarter of those aged >34 withdrew.

The most common amount to take out was $10,000 each time the possibility became available.

All said and done, that typically meant pulling down 51% of the total balance. That also meant foregoing $120,000 on average by retirement! Image
Read 10 tweets
Dec 21
The biggest argument against using GLP-1s for weight loss is that they cause excess muscle loss.

But as it turns out... GLP-1s do not cause any more muscle loss than traditional weight loss methods!

Let's discuss🧵Image
The differences in weight loss in that chart showing data from different trials are not

1. Clinically significant—they're not large enough to matter physiologically

2. Statistically significant—each weight loss method is not distinguishable in current data

But that's lean mass
Lean mass includes water.

Unfortunately, if we use DXA scans to understand body composition, we include that with muscle.

But if we use MRIs, we can separate water and muscle! As it turns out, the UK Biobank has just the required data. Image
Read 13 tweets
Dec 7
Why do identical twins have such similar personalities?

Is it because they're reared together? Is it because people treat them alike due to their visual similarity?

Nope! Neither theory holds water. Image
Despite looking as similar as identical twins and being reared apart, look-alikes are not similar like identical twins are. In fact, they're no more similar than unrelated people.

This makes sense: they're only minimally more genetically similar than regular unrelated people.
The other thing is that twins reared apart and together have similarly similar personalities.

In fact, there might be a negative environmental effect going on, where twins reared together try to distinguish their personalities more!
Read 7 tweets
Dec 2
Society is cognitively stratified:

Smart people tend to earn higher educations and higher incomes, and to work in more prestigious occupations.

This holds for people from excellent family backgrounds (Utopian Sample) and comparing siblings from the same families! Image
This is true, meaningful, and the causal relationship runs strongly from IQ to SES, with little independent influence of SES. Just look at how similar the overall result and the within-family results are!

But also look at fertility in this table: quite the reverse! Image
Source: sciencedirect.com/science/articl…

And to learn more about this general phenomenon, see: cremieux.xyz/p/intelligence… (I've added this citation to this article!)
Read 5 tweets
Nov 25
After this article came out, several people responded, alleging that a cultural model made more sense.

Clark has a point-by-point response🧵

Let's start with the first thing: parent-child and sibling correlations in status measures are identical—hard to explain culturally! Image
The reason this is hard to explain has to do with the fact that kids objectively have more similar environments to one another than to their parents.

In fact, for a cultural theory to recapitulate regression to the mean across generations, these things would need to differ! Image
Another fact that speaks against a cultural explanation is that the length of contact between fathers and sons doesn't matter for how correlated they are in status.

We can see this by leveraging the ages parents die at relative to said sons. Image
Read 10 tweets
Nov 24
The idea:

The internet gives everyone access to unlimited information, learning tools, and the new digital economy, so One Laptop Per Child should have major benefits.

The reality:

Another study just failed to find effects on academic performance. Image
This is one of those findings that's so much more damning than it at first appears.

The reason being, laptop access genuinely provides people with more information than was available to any kid at any previous generation in history.

If access was the issue, this resolves it. Image
And yet, nothing happens

This implementation of the program was more limited than other ones that we've already seen evaluations for though. The laptops were not Windows-based and didn't have internet, so no games, but non-infinite info too

Still huge access improvement though
Read 4 tweets

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