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🇺🇸 **Tariffs are Already Stalling the Economy**

“_Tariff Front-Running is Already Showing Up as Reductions in US GDP Growth_”

🔗 apricitas.io/p/tariffs-are-alr.

@economics

**A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode**

“_....the hyper-Catalan numbers 𝐶𝐦 count the number of subdivisions of a polygon into a given number of triangles, quadrilaterals, pentagons, etc. (its type 𝐦), and we show that their generating series solves a polynomial equation of a particular geometric form. This solution is straightforwardly extended to solve the general univariate polynomial equation._”

Wildberger, N. J. and Rubine, D. (2025) ‘A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode’, The American Mathematical Monthly, pp. 1–20. doi: doi.org/10.1080/00029890.2025..

A mere coincidence?

Flipboard UK  
Global CEO pay has increased 56 times more than worker wages since 2019 https://www.euronews.com/2025/05/01/global-ceo-pay-has-increased-56-times-m...

No better time than now to get off platforms such as and onto .

BBC News  
Xbox price rises by £50 amid tariff uncertainty https://www.bbc.com/news/articles/cze1zn9d9p4o?utm_source=flipboard&utm_medium=activitypub Pos...

Now, this one is truly interesting in terms of economic news:

Foreign Buyers’ Strike Threatens Dollar’s Reign as U.S. Capital Flows Stall (Deutsche Bank)

quiverquant.com/news/Foreign+B

Key quotes:

- Deutsche Bank identifies a halt in foreign purchases of U.S. stocks and bonds.
- ETF flows show active selling of U.S. bonds and stagnation in equity inflows.
- Dollar at risk as a twin-deficit currency amid capital outflow concerns.

1/x 🧵

**Threshold fertility for the avoidance of extinction under critical conditions**

“_The results indicate that the fertility rate should exceed 2.7 to avoid extinction. The extinction threshold is reduced by a female-biased sex ratio. We argue that the present results explain the observed phenomena of female-biased births under severe conditions as an effective way to avoid extinction._”

Cuaresma DCN, Ito H, Arima H, Yoshimura J, Morita S, et al. (2025) Threshold fertility for the avoidance of extinction under critical conditions. PLOS ONE 20(4): e0322174. journals.plos.org/plosone/arti.

@anthropology

🇨🇦 🇲🇽 **Travel companies say Canadians are canceling US travel — and opting for this destination instead**

“_Mexico has emerged as a popular alternative for Canadian travelers skipping the US._”

🔗 businessinsider.com/canadians-.

Imagine a publishing house with the mission of making knowledge and insights available to everybody for free, while ensuring high standards.

Well, the three universities of Berlin and the Charité have now joined forces to do just that.

They founded "Berlin Universities Publishing". Neither authors not readers pay. The pdf of books are freely available under a Creative Commons licence.

It's called "Diamond Open Access". They're just starting up. Much more to come.

berlin-universities-publishing

🇪🇺 **Living conditions in Europe - poverty and social exclusion**

“_In 2024, 93.3 million people in the EU were at risk of poverty or social exclusion; this was equivalent to 21.0% of the EU population._”

🔗 ec.europa.eu/eurostat/statisti.

🇺🇸 **The federal minimum wage is officially a poverty wage in 2025**

“_The annual earnings of a single adult working full-time, year-round at $7.25 an hour now fall below the poverty threshold of $15,650 (established by the Department of Health and Human Services guidelines)._”

🔗 epi.org/blog/the-federal-minim.

@economics

💻 :youtube: **But what is Quantum Computing? (Grover's Algorithm)**

3Blue1Brown

"_Qubits, state vectors, and Grover's algorithm for search._"

length: thirty-six minutes and fifty-three minutes.

🔗 youtube.com/watch?v=RQWpF2Gb-g.

@science

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