Stephan Mescher

Thrilled that our paper "Almost fare free: Impact of a cheap public transport ticket on mobility patterns and train delays" - the 9-Euro Ticket - is now out at @JPubEcon: sciencedirect.com/science/articl… Using three different datasets and MVPF analysis, we find that...

That's what happens when you meet a guy whose entire job for decades has been shaking hands

Ich hätte nie gedacht, dass ich mal eine Person sein würde, die um 6:00 aufsteht, um vor der Arbeit noch zum Sport zu gehen. Und ich hatte Recht.

Being in your early 40s is weird, man. People around your age are in every stage of life. You have people who are grandparents. You have people who have newborns. You have people dating 25-year-olds. You have people celebrating their 20th wedding anniversary. Some of them look 60, and some of them look 30. All the bases are covered when you are in your early 40s.

okay I guess I have to talk about Péter Magyar here. Let me just start with saying, in a very unladylike way, that you guys seem to have zero clue what happened in Hungary in the last two years, you completely miss the point, and you're a disappointing bunch. Let's go.

Schlimmer als Trump sind nur die ganzen Republikaner, die aus eigenem Machterhalt (seit Jahren) wirklich jeden Funken Moral und Anstand über Bord geworfen haben.

It is utterly dispiriting how few of these bubbles are reliable sources of information.

Bernhard Riemann died in 1866 at the age of 39. Here is a list of things named after him. Riemann bilinear relations Riemann conditions Riemann form Riemann function Riemann–Hurwitz formula Riemann matrix Riemann operator Riemann singularity theorem Riemann surface Compact Riemann surface The tangential Cauchy–Riemann complex Zariski–Riemann space Cauchy–Riemann equations Riemann integral Generalized Riemann integral Riemann multiple integral Riemann invariant Riemann mapping theorem Measurable Riemann mapping theorem Riemann problem Riemann solver Riemann sphere Riemann–Hilbert correspondence Riemann–Hilbert problem Riemann–Lebesgue lemma Riemann–Liouville integral Riemann–Roch theorem Arithmetic Riemann–Roch theorem Riemann–Roch theorem for smooth manifolds Grothendieck–Hirzebruch–Riemann–Roch theorem Hirzebruch–Riemann–Roch theorem Riemann–Stieltjes integral Riemann series theorem Riemann sum Riemann–von Mangoldt formula Riemann hypothesis Generalized Riemann hypothesis Grand Riemann hypothesis Riemann hypothesis for curves over finite fields Riemann theta function Riemann Xi function Riemann zeta function Riemann–Siegel formula Riemann–Siegel theta function Free Riemann gas Riemann invariant Riemann–Cartan geometry Riemann–Silberstein vector Riemann-Lebovitz formulation Riemann curvature tensor Riemann tensor Riemannian graph Riemannian group Riemannian holonomy Riemannian manifold also called Riemannian space Riemannian metric tensor Riemannian Penrose inequality Riemannian polyhedron Riemannian singular value decomposition Riemannian submanifold Riemannian submersion Riemannian volume form Riemannian wavefield extrapolation Sub-Riemannian manifold Riemannian symmetric space Riemann's differential equation Riemann's existence theorem Riemann's explicit formula Riemann's minimal surface Riemann's theorem on removable singularities

Da haben Italiens machtgierige Rechte was auf ihre klebrigen Finger gekriegt. Immer wollen sie die Regeln des Spiels zu ihren Gunsten ändern, wenn sie an die Macht gelangt sind.

Man was not meant to monitor this many situations.

Ezra Klein: "Having AI summarize a book or paper for me is a disaster. It has no idea what I really wanted to know and wouldn't have made the connections I would've made. I'm interested in the thing I will see that other people wouldn't have seen, and I think AI typically sees what everybody else would see. I'm not saying that AI can't be useful, but I'm pretty against shortcuts. And obviously, you have to limit the amount of work you're doing. You can't read literally everything. But in some ways, I think it's more dangerous to think you've read something that you haven't than to not read it at all. I think the time you spend with things is pretty important." @ezraklein

I’m a chemist. I need to say this - because it’s getting dangerous out there. The biggest health myth in the world isn’t about vaccines. Or GMOs. Or fluoride. It’s the root of all of them. It’s called chemophobia - and it’s killing science. Fear of “chemicals” now drives vaccine rejection, GMO bans, food hysteria, and entire political movements. From tampons to tap water, people have been taught to fear chemistry - the very thing that keeps us alive. Chemophobia tells us: “Natural is good.” “Synthetic is bad.” That’s a lie. Botulinum toxin is 100% natural and one of the deadliest molecules known. Aspirin is synthetic and life-saving. We’ve gone from banning harmful substances for good reason…to banning safe, well-tested molecules for emotional reasons. You’ve seen the slogans: “If you can’t pronounce it, don’t eat it.” “Paraben-free.” “Clean beauty.” They sound empowering. But they’re not science - they’re marketing. And they’re making the world dumber, poorer, and sicker. Your body doesn’t care if a molecule comes from a plant or a lab. Vitamin C is vitamin C. Formaldehyde is formaldehyde and your body makes more of it every day than any vaccine ever could. Dose matters. Source doesn’t. This fear isn’t harmless. It shapes public policy. It blocks innovation. It raises food prices. It slows down cancer treatments. Chemophobia is now mainstream and it’s costing lives. Scientists aren’t losing because we’re wrong. We’re losing because fear spreads faster than facts. Because influencers sell fear for clicks. Because lawyers monetize doubt. And because scientists are too tired to fight back. So here’s my message, as a chemist and as a citizen: Learn how toxicology works. Call out chemical fear-mongering. Support policies based on evidence, not emotion. Chemistry isn’t the enemy. It’s the reason you have clean water, safe food, and modern medicine. If we let fear win, we lose all of it.

@BBCBreaking It‘s not exactly Franklin D. Roosevelt either…

US President Donald Trump says "this is not Winston Churchill we're dealing with" over UK PM Keir Starmer's initial response to Iran war bbc.in/3OJErG4

Jeder amerikanische Krieg im Nahen Osten sollte kurz werden. Keiner wurde es. Die einzige ehrliche Antwort auf “Was passiert jetzt?” ist: Niemand weiß es. Ein demokratischer, freier Iran ist wünschenswert. Ob er das Ergebnis sein wird? Die nächsten Wochen werden es zeigen.

Today is a good reminder of how Elon Musk absolutely destroyed Twitter’s utility as an information tool.

Be careful with those who once again frame complex conflicts as moral litmus tests — dividing the world into the “free” and those who supposedly side with extremists. This rhetoric has a history, and it has led to disastrous decisions before.

Just sayin’: Trump is bombing Iran while - domestically - his allies are circulating papers on how to force-federalize elections on phony claims, his Petie destroys the US AI industry, and many newspapers are reporting that the Epstein files are missing key documents on Trump.

all hot guys have one thing in common they all like mathematics

@nicksvb Er ist auch Experte für Autothiouning

wenn daniel thioune zu werder geht, heißt er dann daniel thiounefisch?

It's the most German thing ever to notice that your organisation is not following the official instruction manual properly and then writing a 95 dot-point summary of how wrong they are.