@tomfid.bsky.social
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
Sometimes the best model is the data – MetaSD
metasd.com
October 21, 2025 at 10:53 PM
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
Reposted
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
July 25, 2025 at 7:00 PM
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...
July 25, 2025 at 3:25 PM
#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...
Shoehorning the Problem into the Archetype – MetaSD
metasd.com
July 23, 2025 at 12:33 AM
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
What is SD? 2.0 – MetaSD
metasd.com
July 22, 2025 at 10:29 PM
Catching up on What Is #SystemDynamics? metasd.com/2025/07/what-i
Reposted
He's right. "Nothing short of devastating"
By @holdenthorp.bsky.social @science.org
www.science.org/doi/10.1126/...
By @holdenthorp.bsky.social @science.org
www.science.org/doi/10.1126/...
June 5, 2025 at 8:41 PM
He's right. "Nothing short of devastating"
By @holdenthorp.bsky.social @science.org
www.science.org/doi/10.1126/...
By @holdenthorp.bsky.social @science.org
www.science.org/doi/10.1126/...
Reposted
Senate Passes Bipartisan Resolution Preventing Themselves From Stopping Trump theonion.com/senate-...
June 3, 2025 at 2:01 PM
Senate Passes Bipartisan Resolution Preventing Themselves From Stopping Trump theonion.com/senate-...
Reposted
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
Gallagher Re: www.ajg.com/gallagherre/...
Aon: img.clients.aonunited.com/Web/Aon5/%7B...
EM-DAT: www.emdat.be
NEW: NOAA retires its widely cited billion-dollar weather and climate database amid staff cuts. Unique database had been tallying disaster costs for 45 years. www.cnn.com/2025/05/08/c...
NOAA ends extreme weather database that tracked cost of disasters since 1980 | CNN
Its discontinuation is another Trump-administration blow to the public’s view into how fossil fuel pollution is changing the world around them and making extreme weather more costly.
www.cnn.com
May 8, 2025 at 4:25 PM
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
Gallagher Re: www.ajg.com/gallagherre/...
Aon: img.clients.aonunited.com/Web/Aon5/%7B...
EM-DAT: www.emdat.be
Reposted
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....
How climate change is raising your electricity bill
a case study of Texas' electricity market
www.theclimatebrink.com
May 6, 2025 at 7:03 PM
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.
April 11, 2025 at 4:18 PM
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.
April 11, 2025 at 4:18 PM
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.
Guess this is becoming a bit of a theme for me.
Sorry, AI won’t “fix” climate change
OpenAI’s Sam Altman claims AI will deliver an "Intelligence Age," but tech breakthroughs alone can't solve global warming.
www.technologyreview.com
April 11, 2025 at 4:16 PM
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
Tariff dumbnamics in the penguin island autarky - MetaSD
The formula behind the recent tariffs has spawned a lot of analysis, presumably because there’s plenty of foolishness to go around. Stand Up Maths has a good one: I want to offer a slightly different ...
metasd.com
April 11, 2025 at 4:14 PM
The infamous tariff formula as a control system metasd.com/2025/04/tari... #systemdynamics
Reposted
If we unplug a patient’s heart rate monitor, we won’t know if she’s dead. Immortality achieved!
Trump’s EPA Plans to Stop Collecting Greenhouse Gas Emissions Data From Most Polluters
Climate experts expressed shock and dismay at the move. “It would be a bit like unplugging the equipment that monitors the vital signs of a patient that is critically ill,” one said.
www.propublica.org
April 10, 2025 at 6:42 PM
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."
Prediction.
A comparable, incoherent, equally illegal EO on toilet water-use efficiency is coming soon.
www.whitehouse.gov/presidential...
A comparable, incoherent, equally illegal EO on toilet water-use efficiency is coming soon.
www.whitehouse.gov/presidential...
Maintaining Acceptable Water Pressure in Showerheads
By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered: Section 1. Purpose.
www.whitehouse.gov
April 10, 2025 at 3:21 PM
"Notice and comment is unnecessary because I am ordering the repeal."
Reposted
For a minute there, the optimists among us thought the courts might provide a bulwark against the United States becoming a "lawless regime".
April 8, 2025 at 4:59 PM
For a minute there, the optimists among us thought the courts might provide a bulwark against the United States becoming a "lawless regime".
Reposted
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.
April 6, 2025 at 1:40 PM
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.
Reposted
@sulliview.bsky.social @jayrosen.bsky.social @sreenet.bsky.social @froomkin.bsky.social @dicktofel.bsky.social
April 6, 2025 at 2:37 PM
Reposted
“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...
theonion.com/trump-a...
Trump Assures Wall Street He’ll Go Back To Just Fucking Over Poor People Soon
WASHINGTON—In response to market panic about his new wide-ranging tariffs, President Donald Trump reportedly offered Wall Street assurance Friday that he would soon go back to just fucking over poor people. “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,” […]
theonion.com
April 5, 2025 at 12:00 AM
“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...
theonion.com/trump-a...
Trumpers fleeing to ... value?
April 4, 2025 at 11:00 PM
Trumpers fleeing to ... value?
Reposted
Four countries that have successfully reversed democratic decline in recent years
April 1, 2025 at 3:58 PM
Four countries that have successfully reversed democratic decline in recent years
Tech note on elasticity formulations in #systemdynamics metasd.com/2025/03/elas...
Elasticities in SD - MetaSD
Guido Wolf Reichert asks an interesting question at math.stackexchange: The question cites a useful paper by Max Kleemann, Kaveh Dianati and Matteo Pedercini in the ISDC 2022 proceedings. I’m not awar...
metasd.com
March 20, 2025 at 10:42 PM
Tech note on elasticity formulations in #systemdynamics metasd.com/2025/03/elas...
Revisiting Jay Forresters views on forecasting and data: metasd.com/2025/03/read... #systemdynamics
Reading between the lines: Forrester on forecasting - MetaSD
I’d like to revisit Jay Forrester’s Next 50 Years article, with particular attention to a couple things I think about every day: forecasting and prediction. I previously tackled Forrester’s view on da...
metasd.com
March 20, 2025 at 10:41 PM
Revisiting Jay Forresters views on forecasting and data: metasd.com/2025/03/read... #systemdynamics
Updated edition of my Bathtub Statistics model metasd.com/2025/03/new-... #systemdynamics
New Bathtub Statistics edition - MetaSD
I’m working on a unified minicourse in stats for SD. A first spinoff is an update of my Bathtub Statistics model.
metasd.com
March 20, 2025 at 10:41 PM
Updated edition of my Bathtub Statistics model metasd.com/2025/03/new-... #systemdynamics