Crémieux Profile picture
Aug 21, 2024 14 tweets 5 min read Read on X
In the U.S., you are legally permitted to sell your blood plasma for money, but it's called "donation".

In recent years, the numbers of places set up for donations has skyrocketed, and the amount they're compensating donors has followed suit.

Let's dig in. Image
Most of the visitors to these donation centers are highly local (A)

People are also more likely to visit donation centers in census block groups (CBGs) that are marked by poverty (B)

Why? Image
In surveys, donating plasma is predicted by being poor, Black, male, married, having kids, being a student, etc.

In short, people who could really use an extra $150 twice a week for a minimal inconvenience are more likely to donate. Image
We know this is true because we also have survey data indicating people's stated reasons for donating. Few people are donating altruistically. The top categories by far are about money!

Take a look: Image
Now, before getting to the juicy result, I want to show one more thing: the impact of COVID stimulus checks on plasma donations.

When the checks went out, the number of visits to plasma donation centers cratered. Donations plummeted because people had the cash they needed. Image
Now here's the kicker: When plasma donation centers open up, local inquiries into predatory payday and installment loans falls off.

People are seeking credit and donating blood might be how they get it. Image
If we stratify these trends by age, we see that those with ages less than or equal to 35 - the less well-established - are the ones deciding to use blood plasma donations to offset the need for quick, dangerously high-interest cash, not those greater than 35 years old. Image
When you look at payday transactions rather than inquiries alone, you get the same picture, albeit with more noise.

Young people really do seem to be defraying the need for credit by selling (sorry, donating!) their blood plasma.Image
The reasons people sell their are also, evidently, not just to cover essentials.

One of the clearest-cut impacts is that entertainment establishments see an increase in visits after blood plasma donation centers open up. Image
That last part clarifies something: people would prefer not to get risky, high-interest loans, and they really want a little bit of extra cash. So while they will seek out those loans if push comes to shove, they're more likely to frivolously pursue blood donation.
And that's good! We need blood plasma donations, so if paying people a bit of money makes that possible, so be it.

If we take away that possibility, we can also see that it would make people's lives worse.

How far can we take this? Maybe we can learn from Iran.
In the U.S., about 0.5-1% of the federal budget goes to dialysis:

In Iran, there is a legal, regulated market in selling kidneys and it's such a good deal that the government even pays for the operations. It beats paying for dialysis!
Image
People are more than willing to sell their bodies in different ways that help their fellow citizens, from selling their blood plasma to pawning off a kidney.

Given so many people want to do that, and so many people would benefit from it, the question is, why not?
Frankly, I think we should just do it. The blood plasma donation model has been such a success and it's more than evident that organ payments could be too.

Worried about corruption? Then regulate it well!

Sources:



academic.oup.com/rfs/article-ab…
pbs.org/newshour/show/…

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More from @cremieuxrecueil

Jan 29
How well-known is this?

A lot of the major pieces of civil rights legislation were passed by White elites who were upset at the violence generated by the Great Migration and the riots.

Because of his association with this violence, most people at the time came to dislike MLK. Image
It's only *after* his death, and with his public beatification that he's come to enjoy a good reputation.

This comic from 1967 is a much better summation of how the public viewed him than what people are generally taught today. Image
And yes, he was viewed better by Blacks than by Whites.

But remember, at the time, Whites were almost nine-tenths of the population.

Near his death, Whites were maybe one-quarter favorable to MLK, and most of that favorability was weak. Image
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Jan 28
The Pope, like his recent predecessors, is good to take this position: anti-Semitism is manifestly idiotic!

On that note, did you know that the Catholic Church was actually one of the biggest forces in stopping the rise of the Nazis?

It's true!🧵 Image
You might say that the Catholics didn't vote for the Nazis because they had their own party: Zentrum.

This isn't the explanation.

Note: the Catholic Church opposed both forms of totalitarianism in Germany, but it had an asymmetric effect against the Nazis, not the Communists.Image
The real "Catholic effect" on far right vote shares was small.

In reality, Catholics only became poised against the far right when the church began to actively campaign against it.

But when the local clergymen were "Brown Priests" (Nazi-supporting priests) like Alois Hudal? Image
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Jan 27
The researcher who put together these numbers was investigated and almost charged with a crime for bringing these numbers to light when she hadn't received permission.

Now we have an update that goes through 2020!

First: Where are Sweden's rapists from?

Mostly not Sweden. Image
What countries were those foreign rapists from?

We only got information on the top five origins, constituting roughly half of the foreign-born samples, and thus about a quarter of all the rapists. Image
What about welfare usage? 35.1%.
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A diagnosed psychiatric disorder besides that? 13%

What about a criminal prior? 52%. That compares to 13.4% of non-rapist criminals. So rapes? Considerably more preventable.
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Jan 17
Greater Male Variability rarely makes for an adequate explanation of sex differences in performance.

One exception may be the number of papers published by academics.

If you remove the top 7.5% of men, there's no longer a gap! Image
The disciplines covered here were ones with relatively equal sex ratios: Education, Nursing & Caring Science, Psychology, Public Health, Sociology, and Social Work.

Because these are stats on professors, this means that if there's greater male variability, it's mostly right-tail
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The percentiles in this image are for the combined group, so these findings coexist for composition reasons. Image
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Jan 17
One of the issues with understanding Greater Male Variability on IQ tests is that groups that perform better tend to show greater variance

Therefore, to estimate the 'correct' male-female gap, you need to estimate it when the difference is 0

In the CogAT, that looks like this: Image
In Project Talent, that looks like this: Image
And comparing siblings in the NLSY '79, that looks like this: Image
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Jan 14
About a decade ago, a theory emerged:

If men do more of the housework and child care, fertility rates will rise!

Men have been doing increasingly large shares of the housework and child care.

Fertility is lower than ever.Image
In fact, they're doing more in each generation, but fertility has continued to fall. Image
The original claim, that men's household work would buoy fertility, was based on cross-sectional data that was inappropriately given a causal interpretation.

The updated cross-sectional data is as useful, and it affords no assurances about the original idea.

We should move on.
Read 4 tweets

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