tomfid.bsky.social

Introducing the #CausalSlopDiagram with a great series on publishing in #systemdynamics metasd.com/2026/10/avoi...

Sometimes a model can be used to find convincing data, for an end run around the "it's just a model" foolishness metasd.com/2025/09/some... #systemdynamics

AI-powered speculators sustain collusive profits without communication or intent, undermining market efficiency and liquidity. Identifying two algorithmic mechanisms and when each arises, from Winston Wei Dou, Itay Goldstein, and Yan Ji https://www.nber.org/papers/w34054

#SystemDynamics graphical conventions for conveyor stocks are flawed metasd.com/2025/07/conv...

A bit of history: Barry Richmond on shoehorning the problem into the #systemdynamics archetype: metasd.com/2025/07/shoe...

Catching up on What Is #SystemDynamics? metasd.com/2025/07/what-i

He's right. "Nothing short of devastating" By @holdenthorp.bsky.social @science.org www.science.org/doi/10.1126/...

Senate Passes Bipartisan Resolution Preventing Themselves From Stopping Trump theonion.com/senate-...

www.youtube.com/watch?v=l0Sa...

A major loss to our understanding of how extreme weather events are affecting us. There are 3 alternative databases I will be using: Gallagher Re: www.ajg.com/gallagherre/... Aon: img.clients.aonunited.com/Web/Aon5/%7B... EM-DAT: www.emdat.be

Neat new paper by Andrew Dessler on how climate change is driving up electricity costs in Texas by producing more extreme demand. Details over at The Climate Brink: www.theclimatebrink....

I think this post metasd.com/2024/12/dest... is relevant to practically every bit of news I've seen lately.

I think this post metasd.com/2024/12/dest... is relevant to practically every bit of news I've seen lately.

Silly to think that AI will step in and save us right when the government is at peak stupid.

The infamous tariff formula as a control system metasd.com/2025/04/tari... #systemdynamics

If we unplug a patient’s heart rate monitor, we won’t know if she’s dead. Immortality achieved!

"Notice and comment is unnecessary because I am ordering the repeal."

For a minute there, the optimists among us thought the courts might provide a bulwark against the United States becoming a "lawless regime".

I was proud to write for the New York Times for more than 20 years, but I’m not proud of the newspaper’s buried coverage of the nationwide #handsoff protests. Compare the printed front page today to 1970 Earth Day.

@sulliview.bsky.social @jayrosen.bsky.social @sreenet.bsky.social @froomkin.bsky.social @dicktofel.bsky.social

“While my trade policy might cause some temporary hardships for investors, it’s ultimately intended to completely fucking destroy the livelihoods of the financially destitute,” said Trump theonion.com/trump-a...

Trumpers fleeing to ... value?

Four countries that have successfully reversed democratic decline in recent years

Tech note on elasticity formulations in #systemdynamics metasd.com/2025/03/elas...

Updated edition of my Bathtub Statistics model metasd.com/2025/03/new-... #systemdynamics

I’m working on a unified minicourse in stats for SD. A first spinoff is an update of my Bathtub Statistics model. metasd.com/2025/03/new-...

Verified in a long conversation with Grok3: metasd.com/2025/03/grok...

NEWS: #Trump plans to gut Veterans Affairs. Montana, which has one of highest shares of vets (8.9% of population), will see reduced care for those who so ably served our country. #mtnews #mtpol

Our paper "Climate Change and the Global Distribution of Wealth" is out in @natclimchange.bsky.social! We study how climate impacts & policies are transforming wealth inequality 🌍 👉 www.nature.com/articles/s41... Huge thanks to an incredible team: C. Mohren, P. Bothe & @gregorsemieniuk.bsky.social

New paper by Harvey etal reveals that fisheries mangmt must adapt further to climate ✅ management overlooks system complexity leading to feedback loops ✅Integrated social-ecol. data reveals hidden vulnerabilities & strategies ✅ Cross-sector engagement is crucial for success doi.org/10.1007/s111...

The SD Society should be posting here ... so here's a copy. 💡 We can’t control systems or figure them out. But we can dance with them! - Donella Meadows 🔗 Continue reading: ow.ly/FQXr50TmXFv 📚 Meadows DH. 2008. Thinking in Systems: a Primer 🔗 ow.ly/OKmT50TmXFs #SystemDynamics #systemsthinking

With a few exceptions, "leaders" needs air quotes.

grok 2 vs grok 3

This gives new meaning to "move fast and break things."

metasd.com/2024/12/dest...

Prizes are a neat way to reward innovation performance, but I suspect that they disproportionately serve large institutions. If you have 1000 projects running in diverse areas, you've diversified the risk of failure. If you're an individual or small organization, you can't afford the downside.

What a disgrace. Bezos and the newspaper he has destroyed should be grateful that anyone thinks it’s still worthwhile to buy ad space from them. *This* is how democracy dies.

the single most un-american and anti-constitutional statement ever uttered by an american president

The U.S. Botanical Garden, free to all. Elon Musk is trying to take this from the American people. #nokingsday #e3

A few years ago: metasd.com/2019/07/comp... But in this case there's no ambiguity.

Good news for a change. Today we published: Restoring predators, restoring ecosystems: Yellowstone wolves & other carnivores drive strong trophic cascade @nywolforg.bsky.social @ecowarriorss.bsky.social @xrglobal.bsky.social phys.org/news/2025-02...

Elon Musk Offers Self $10 Billion Federal Buyout theonion.com/elon-mu...

Very meta; pretty sure this is the definition of conflict of interest.

A lot of folks asked why I through this January's record global temperatures were so unexpected. I think this graph shows it pretty clearly: pretty much every other January with La Nina conditions has been a cooler than the surrounding years.