Crémieux Profile picture
Feb 11, 2025 • 25 tweets • 10 min read • Read on X
Trump is wrong about this. Canada didn't steal the auto industry from the U.S.

The decline of the auto industry in the U.S. was driven in no small part by racism.

Let's talk Detroitđź§µ Image
It seems shocking nowadays, but the best major American city for a young person to be in as late as 1980 was Detroit.

The Motor City was America's richest city, not too long ago. Plenty of you reading this will remember a prosperous, beautiful Detroit. Image
If you're in tech, you might have noticed that a disproportionate number of your friends are from Michigan, and specifically, from suburbs like Troy, Novi, Farmington, Royal Oak, Rochester, and so on.

When Detroit went, so did the reasons for talented young people to stay. Image
So, why did Detroit decline?

There are stories in here about mounting foreign trade and competition, protectionism-driven complacency, auto worker unions, bureaucratic missteps, and urban sprawl, but all of that's minor next to the impact of Mayor Coleman Young. Image
Coleman Young was Detroit's first Black mayor. His political ascendance to that position traces to a 1948 Supreme Court decision.

In Shelley v. Kraemer, the Supreme Court made it possible for Blacks to buy properties in neighborhoods that had race restrictions on homeownership.Image
The effect of the ruling was to spike Black urbanization.

It seems the people who set up covenants knew their offerings would be bought by Blacks if they were able, and they didn't want that.

In cities like Chicago, Kansas City, Baltimore, and St. Louis, the effect was massive: Image
Detroit was no exception.

After Blacks became legally capable of moving into the places in the city that they could afford, they started doing that right away.

But as Blacks moved into the cities, Whites opted to escape crime, poverty, and integration, to the suburbs. Image
Detroit went from 83.58% White in 1950 to 70.83% White in 1960. By 1970, the city was just 53.98% non-Hispanic White, and it had skyrocketed from 16.25% Black in 1950 to 43.69% Black by 1970.

The city responded to this in various ways, like with police programs such as CRASH. Image
During the "long, hot summer of 1967", Detroit was hit with the 12th Street Riot, and the results was that the city wound up aflame with racial tensions that nobody—not President Johnson, nor Governor Romney, or Mayor Cavanagh—could squelch.

White flight kept going. Image
In 1973, the mayoral race was between a White man—John Nichols, the police commissioner—and a Black man—the protagonist of the story, Coleman Young.

Almost every White in the city voted Nichols. Almost every Black voted Young.

It was a racial headcount and Young came out ahead. Image
In that election, Young's margin of victory was slim. There were almost as many Whites as there were Blacks in the city, but the Blacks were more motivated to get out the vote.

Young never had another slim margin after that. His rule was about building a lead, by any means.
And it succeeded!

In 1977, he had an 18pp lead over a moderate Black candidate dubbed "the great black white hope". In 1983, he beat his last White opponent by 32 pp. In his final two elections, he beat a Black opponent by 20 pp in 1985 and 12pp in 1989.

He simply ruled.
But the way he got this rule was by ensuring that Detroit had no way back, by guaranteeing that the city would never be America's richest city again, barring some sort of miracle.

Young sought to implement policies to change the city's demographics: more Blacks, fewer Whites. Image
The Whites in the city recognized Young's efforts, and felt that they were discriminated against.

And Whites responded by moving to suburbs located as close as possible to Detroit, but not controlled by Mayor Young.

7/10 Whites agreed: Coleman Young discriminates! Image
And Young's policy was crafty.

For example, in response to Whites choosing commutes instead of his rule, he increased the commuter tax rate, while raising the local income tax rate on the remaining, well-to-do mostly White upper crust of the city. Image
Young targeted building projects so as to make it easier for his supporters to stay in the city.

To be clear, this was an absurd move given the White exodus meant the housing market in the city was busted and houses sold for less than construction costs.
Young also cut public services favored by Whites, including sabotaging the police force, fire department, and trash collection.

At the same time, he promoted immorality that the White population took umbrage with in the form of things like casinos. Image
Young didn't do anything during this time to attract, keep, or grow the skilled labor force needed for the local auto industry.

So its decline was assured by his rule. No one was going to move back in sufficient numbers to sustain it, and the city ended up all the worse for it. Image
This one mayor had effectively shut out the existence and future possibility of Detroit's agglomeration economy in making cars.

But to be clear, Coleman Young wasn't even the first Mayor to do this in America.

Boston Mayor James Curley also sought to weaponize demographics. Image
Mayor Curley was proudly Irish, and he hated Yankees (this used to mean 'northern founding stock Americans'), and none more than the Boston Brahmin.

Between his first mayoral election in 1913 and his last in 1944, he managed to oust the city's Anglos in a reign of impunity.Image
Curley was insanely corrupt, and did everything he could to aggravate Anglos. He hated Anglos, and if he knew you were an Anglo, a Protestant, or anyone not in his ethnically-new-to-America coalition, he probably hated you, specifically.Image
Curley discriminated directly and openly.

He would tell Anglos they could get a job under him if and only if they could do the impossible.

He would raise the salaries of roles with few Anglos and lower the salaries of roles with many Anglos.Image
This was not good for Boston as a whole, just as Young's rule was not good for Detroit.

As in Michigan, people tried to escape Curley whenever they could, and he was happy with that. He wanted an ethno-city, not prosperity, and he was very clear about that! Image
An even more explicit ruler who caused harm by exploiting demographics is Robert Mugabe, who sought to get Whites to leave Rhodesia (now Zimbabwe), and to alienate opposed Blacks.

He went so far as to hire his own marauders to kill and harass White farmers in droves. Image
Thread limit, so I'll say this: Zimbabwe has turned out predictably.

So has Detroit, and so did Boston in the time of Curley. Boston has arguably never recovered, since without Curley, it would very likely have become a far larger, better managed city.

Sources and reading material:

sciencedirect.com/science/articl…

scholar.harvard.edu/files/shleifer…

storymaps.arcgis.com/stories/fa7859…

policing.umhistorylabs.lsa.umich.edu/s/detroitunder…

policing.umhistorylabs.lsa.umich.edu/s/detroitunder…

en.wikipedia.org/wiki/Demograph…

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More from @cremieuxrecueil

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
Despite this, the very highest-performing women actually outperformed the very highest-performing men on average, albeit slightly.

The percentiles in this image are for the combined group, so these findings coexist for composition reasons. Image
Read 6 tweets
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
Read 5 tweets
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
Jan 13
American military veterans have a suicide problem.

Some have theorized the reason is deployment-related trauma.

Leveraging the random assignment of new soldiers to units with different deployment cycles, Bruhn et al. found that was wrong.

Deployment did not increase suicides. Image
Looking only at violent deployments (ones with peer casualties), there aren't noncombat mortality effects either.

What explains veteran suicide rates? Image
The reason seems to be that the proposition is wrong: veterans do not have increased suicide risk.

This may seem surprising, but it's not!

Their suicide rates are elevated over the general population because most of them are young White men. That group has a suicide issue. Image
Read 8 tweets
Jan 12
That aspect is probably not that unrealistic, unfortunately.

Across the OECD, on average, just 55% of 15-to-16-year-olds got this question right, and no country saw 80% get it.

Most people globally *do* struggle even reading simple tables. What else?

Thread.đź§µ Image
That table-reading question is "Level 3", which, amazingly, corresponds to an already-high level of ability, by global standards.

This is a simpler Level 1 question, but with this, 92% of the OECD got it, including just 65% of Brazilians and 53% of Peruvians. Image
Level 2!

Just 77% of the OECD got this, with less than half of the Mexican population being up to the task.

In fact, only Asian countries got over 90% on this trivial question. Image
Read 9 tweets
Jan 10
Credit card rewards are a great way to redistribute billions of dollars from people who are bad with money to people who are good with it.

With the advent of rewards cards (red), there's lots of cross-subsidization of people with high credit scores by people with low scores. Image
Curiously, the degree of cross-subsidization is not just an income thing.

People with high incomes (green) and moderate incomes (yellow) take fewer rewards at low credit scores, although they take more at high credit scores. Image
What does this do demographically? Spatially?

Credit card rewards transfer money from uneducated to educated, poor to rich, Black to White, and rural to urban. Image
Read 5 tweets

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