Levi Henze (@HenzeTimon) header
Levi Henze (@HenzeTimon) profile picture

Climate Economist with a passion for many other things. Swimmer and classical music nerd (apparently).

Berlin, de
Joined November 2012
Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)Photo by Levi Henze (@HenzeTimon)
To be clear, 2026 was incredibly stupid and deranged But both bouts created by the US government
Left: inflation. Right: inflation.
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Levi Henze retweeted
We wrote a blueprint for progressive foreign policy in 2029, in case that's something that might be relevant today. Edited by @mattduss with a foreword by @BernieSanders. Mine is the climate chapter.
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Going places
One of the things the data analysts on our side obsessed over was "composition"—whether the electorate looked close enough to 2024 for Republicans to win. And despite polls that showed a Democrat blowout, the data kept on telling us the same story: in some states turnout was merely OK, in other states it was downright amazing, and in no state was it catastrophic. There was a genuine sense of optimism on our team: our people were showing up. So, I asked the smartest data guy I know, does that mean we're going to shock the world? "No," he told me. "We might do better than the polls suggest. But the data is telling us that a lot of Trump/Vance 2024 voters are pissed and planning to vote for the other guys. Our voters are turning out, but they may not vote for us." Well, that looks prophetic now. Our voters did show up. In Florida, for example, the electorate was 9 points more Republican than Democrat, just a couple points worse than 2024. Undoubtedly there were places we could have done better on turnout. But the main problem is not turnout. The main problem is that many people who voted for Trump/Vance in 2024 voted for Democrats in 2026. There will be a lot of infighting and arguing over what happened and why that is. One of the pollsters I really respect told me that our economic messaging wasn’t sharp enough down the stretch. I’m sure that’s true. But the real reason we lost is obvious to almost everyone. Another pollster—one of the smartest people I know in politics, told me yesterday we’d lose the generic ballot by 13 points. I felt negative going into Tuesday, but even I was shocked by this. In his polling, he saw that a lot of Trump 2024 voters were angry and planning to vote for Democrats. He asked those voters who had abandoned us what would cause them to come back on our team. The top four answers, accounting for nearly all of the responses were: 1) End the war 2) Focus on cost of living/inflation 3) Put America First 4) Change our relationship to Israel Our voters showed up. And the above four reasons are why many of them voted for Democrats. This is according to a pollster who nailed the results. While many spent Monday attacking Rachel Campos Duffy for calling for a diplomatic resolution to the conflict, it turns out her political advice was sound. (She’s also a great person.) In the next few months, there's going to be a lot of gaslighting. Expect to hear any number of establishment politicians say the solution to our woes is amnesty. I'm open to the idea that we should change enforcement—by focusing more on businesses that hire illegal labor, for instance. But anyone pushing amnesty is lying to you. The reason we lost is the war. The president himself said so last night. If you'd like to argue it was worth it, that losing the Senate for the next 6 years was worth it, then do so. Argue it was a worthwhile cost to pay. Agree or disagree, that's at least honest. But everyone knows why we lost. And any honest conversation about where we go from here must start there. I remain hopeful about our country. To the people who are pissed off and want to say, “I told you so”: you’re right, you did tell us so. Take that energy into electing Republicans who share your worldview. To the people who are just pissed at the results, you should be. Let’s take that anger and get back to the work of saving our country.
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Generally, nothing causes more discontent than cost of living shocks, especially from high levels amidst high inequality. The incumbent always gets wrecked. It’s hard to infer much else, especially when there are only two parties. If petrol prices are all it takes to end ‘fascism’, you might still have a fascism problem.
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This is spot on: His DICE exercise was always a descriptive baseline. You know that if you ever cared to listen/read. And his influence on actual politics, even the IPCC model family, is often exaggerated, in service of blaming him for slow progress. Scapegoating in droves
With William Nordhaus' recent passing the field of climate economics has lost one of its giants. Nordhaus published in 1977 what was at the time a rather bold projection: the the world would warm by 1.2C by the year 2026. In reality it warmed by 1.1C.
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tech bros after this week
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Levi Henze retweeted
Looking forward to the decades that Abdul will be a force in American politics.
EL-SAYED: And to all the parents who struggled to explain to their kids why the president openly mocks someone for their name or how they pray, let them know tomorrow that the bad guys lost.
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Aber interessant: Bärbel Bas sagt in dem Interview mit Feldenkirchen, dass sie persönlich (jetzt, wo sie frei sprechen kann, wie F. es ausdrückt) hinter dem Rentenpaket der Regierung steht u. grundsätzlich auch die Abschaffung der abschlagsfreien Rente nach 45 Jahren befürwortet.
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Levi Henze retweeted
Entering this era of LLMs
We asked GPT-6 Astra to edit Qwen3.5-0.8B weights to improve math. It directly changed only 0.016% of weights, fixing 0.8B's reasoning loops & improving math up to 6x and even instruction following 3x, without gradients or training. We call this Weight-Space Programming: frontier LLMs can now natively read/write neural network weights! 🧵 Blog: rikiyat.github.io/blog/weigh…
Readers added context they thought people might want to know
LLM was given weights explicitly as text in prompt and used code/forward passes (per authors' logs) to ablate Qwen looping direction, a known thinking-mode issue per model card. Primarily fixed repetition in that mode, not general 'natively' improving weights/math. rikiyat.github.io/blog/weight-sp… github.com/RikiyaT/lm_und… huggingface.co/Qwen/Qwen3.5-0… huggingface.co/RikiyaT/Qwen3.…
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Don’t we all, Lando. Don’t we all
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I’d like to suggest some reading
Although people all over the world are happy to see Trump and MAGA becoming unpopular in the USA, the reason behind it is far less encouraging. Trump could support Putin and Russia all he wanted. He could continue to let Ukrainians get slaughtered, treat Canada like shit, threaten Denmark with war, steal from Venezuela to line his own pockets, support Israel's brutality, and insult allies day after day. The American public doesn't support these things, but they don't seem to care very much about them either. The only reason people are now turning against Trump is because — of all unimportant things — gas has become a little bit more expensive in in a country wealthier than any other in world history. THAT is what infuriates the average voter and makes them turn against Trump The rest of the world is lucky that this is happening, as it weakens Trump. But that doesn't mean we should assume that the USA will act morally on the world stage in the future. Deep down, they simply don't care very much.
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How will high gas prices affect the midterms? It's an important question but hard to answer empirically. I've written down a plan to test part of it, and I'll publish my first results on Thursday, when most of the vote is in. 1/🧵 chdausgaard.github.io/fuel-2…
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Levi Henze retweeted
The critiques of Nordhaus that fail to recognize any tradeoffs may be the best illustration of the importance of Nordhaus’ climate work
Replying to @noahqk
Why would a level of heating that leads to widespread devastation, social injustice, risks fascism worldwide, and possibly risks civilization ending be “optimal”? (Fair warning: this is giving me sociopathic economist profession vibes right now)
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Levi Henze retweeted
Before the Simon-Ehrlich bet, there was Bill Nordhaus. Before McKibben and Hansen and Gore and net-zero, there was Bill Nordhaus. A lovely eulogy from Bill’s nephew @TedNordhaus. breakthroughjournal.org/p/th…
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Die Polizei eskaliert eine Situation. Sogar der WDR-Reporter zeigt sich verwundert über das Vorgehen der Polizei. Die Rede ist von unschuldigen Kindern und Jugendlichen, die in Mitleidenschaft gezogen werden. Schön zu sehen, dass aus Stuttgart21 exakt gar nichts gelernt wurde.
Nach den Gen-Z-Protesten ist es in Köln zu Ausschreitungen gekommen. Der Einsatz eines Wasserwerfers seitens der Polizei hat aus Sicht von WDR-Reporter Jochen Hilgers "sofort zur Eskalation" geführt, wie er in der "Aktuellen Stunde" sagte. Das werde aufgearbeitet werden müssen.
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The signals from the incoming Student List coalition in Serbia continue to be encouraging: removal of street murals glorifying Mladic, the Srebrenica Genocide; a general decline in nationalist rhetoric from leadership figures; early moves against Vucic’s propaganda and criminal-financial networks. We will see how matters will evolve once an actual government is seated but so far there is reason for cautious optimism.
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Levi Henze retweeted
ICYMI: an argument for a humbler approach to analyzing the costs and benefits of climate policies (the title gives the wrong impression). theargumentmag.com/p/what-ec…
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Replying to @unusual_whales
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