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A great use of both Vensim and sdeverywhere. The BRIDGE simulation quantifies the impact of NIH budget cuts in the US. linkedin.com/posts/msjalali… You can try the simulator yourself at mj-lab.mgh.harvard.edu/nih-budget-sim…
Since Trump is again going off about watering LA, I feel compelled to point out the stupidity of that with a stock-flow diagram. metasd.com/2025/02/free-t… #systemdynamics
A classic paper, collab between @AIatMeta , @GoogleDeepMind , and @NVIDIAAIDev Language models keep personal facts in a measurable amount of “storage”. This study shows how to count that storage—and when models swap memorization for real learning. 📡 The Question Can we…
HUGE THANKS to all our amazing #ISDC2025 volunteers! 🙌 Here's to making an impact together! 💪🏻💪🏼💪🏽💪🏾💪🏿 🌐 Join our global community: ow.ly/CVeG50WP1xn #SystemDynamics #systemsthinking
Yes, the H word comes to mind unavoidably...
Holy cow I can't believe the state of Montana again found a way to funnel most of the broadband money to giant, out-of-state billionaires. Truly a bold act, ensuring Elon Musk and Jeff Bezos get a ton of Montana's internet infrastructure money AND a monopoly. #mtpol 🧵⬇️
My resignation letter from CDC. Dear Dr. Houry, I am writing to formally resign from my position as Director of the National Center for Immunization and Respiratory Diseases at the Centers for Disease Control and Prevention (CDC), effective August 28, 2025, close of business.…
It might start as a joke, belief, or rumor. At first, its easy to dismiss. But then it gains a twist, builds momentum, and spreads like wildfire. What causes some ideas to die out while others take over the internet? A new study published in Physical Review Letters offers a…
Alex is right.
Hope so ...
NEW: ICE will acquire advanced AI-powered iris biometric scanning from BI² Technologies to aid deportations. The tech can identify individuals in seconds from virtually anywhere, up to 10–15 feet away using a smartphone. If you think the government will use it only against…
Putin is a war criminal who should be held accountable for the atrocities Russia has committed in Ukraine. Letting him land in the U.S. if there’s nothing in return makes us look weak.
Putin is a war criminal who should be held accountable for the atrocities Russia has committed in Ukraine. Letting him land in the U.S. if there’s nothing in return makes us look weak.
AI, which has never invented any science of significance, is going to be smarter than any kid born this decade? I call bullshit. Looks to me like a smokescreen to distract from the disappointment of GPT-5.
AI, which has never invented any science of significance, is going to be smarter than any kid born this decade? I call bullshit. Looks to me like a smokescreen to distract from the disappointment of GPT-5.
This is why startups that are asking people to work 80 hours a week are engaged in a stupid counterproductive signaling exercise. finance.yahoo.com/news/sf-tech-c… Sell!
This is why startups that are asking people to work 80 hours a week are engaged in a stupid counterproductive signaling exercise. finance.yahoo.com/news/sf-tech-c… Sell!
Interestingly, an economics paper that came out in 2023 predicting which jobs would overlap most with AI turned out to be right. A new Microsoft study of actual AI use by workers (more on that in another post) found a 90% correlation between real world overlap & the predictions.
If climate change is really a hoax, why does Trump need to bury the evidence? Has the OCO seen the Epstein file? opb.org/article/2025/0…
We’re about to do this for the economy
We’re about to do this for the economy https://t.co/D8K7j9O2UQ
Nothing says more to me that the US isn't at all prepared to deal with Putinization than well-meaning experts and advocates talking about Trump's blunders and how things he does look bad. He doesn't care. It only "backfires" if it harms his grip on power. That's it.
Nothing says more to me that the US isn't at all prepared to deal with Putinization than well-meaning experts and advocates talking about Trump's blunders and how things he does look bad. He doesn't care. It only "backfires" if it harms his grip on power. That's it.
I find it increasingly hard to distinguish between US health care and organized crime.

System Dynamics Socie... @systemdynamics_
6K Followers 462 Following Encouraging the use of System Dynamics and systems thinking worldwide
Dr. Elizabeth Sawin @bethsawin
47K Followers 3K Following Director @multisolving. She/her. Systems thinking & multisolving New book: https://t.co/0eRQ1rNC8d look for me @bethsawin.bsky.social
Andrew Jones @AndrewPJones
2K Followers 819 Following Andrew (Drew) Jones, ED @ClimateInteract + @MITSloanSusty w #EnROADS. Scientific simulations as engagement, not just analysis.
Douglas McKelvie @DouglasMcKelvie
392 Followers 1K Following Health and Social Care Simulations Grateful to have had 4 x Covid vaccinations thanks to NHS
M.J. @msjalali
2K Followers 498 Following Associate Prof @HarvardMed, MGH; Senior Lecturer @MITSloan. Systems scientist, developing simulation models for population-based health problems
Climate Interactive @climateinteract
9K Followers 2K Following Climate Interactive creates and shares tools—like #EnROADS and @WorldClimate—that drive effective and equitable climate action. Retweets ≠ endorsements
Pouria (P.A) Paridar @pa_at_pa
387 Followers 656 Following Promovendus @TUDelftTBM | Researcher @PDPC21 | Ex-researcher @UCL | @BristolUni | #Simulation | #EarlyWarning | #Health | #Transportation | Cyclist
Eqalqooc @Eqalqooc126
91 Followers 1K Following
Dr Dee @Drdee_09
962 Followers 3K Following policy commentator. Defender of U.S. Taxpayers. Youtube @drdeedeecurtise
Kate @Kate01739868421
123 Followers 4K Following
sara s.g @susat_z9
20 Followers 1K Following
Visentry @VisentryRG
442 Followers 5K Following Visentry was founded by two security service experts with more than 50 years of combined experience
Pauline Jouliee @PaulineClifto12
2K Followers 2K Following We are working to spread smiles to the world.
Ugo Bardi @ugo_bardi
2K Followers 2K Following Increases are of sluggish growth, but the way to ruin is rapid (Lucius Annaeus Seneca) #Senecaeffect #Collapse #Ecosystem #Reptilians
Eeblajaw @Eeblajaw567140
30 Followers 1K Following
Sarxe @Sarxe79334
12 Followers 781 Following
哈基米 @zhujny06743177
280 Followers 2K Following 🇨🇳人。日本語とEnglishを学んでる。I love cats.A student majoring in HRM but econometrics、system dynamics、operation research、データサイエンス、環境問題に興味深いのです。敬邻永安,世界和平。
Erduamou @Erduamou23636
49 Followers 2K Following
SDGsHub_GCC @SDGsHub_GCC
375 Followers 8K Following Monitoring &advancing #SDGs in #GCC. Analysis, insights, recommendations to accelerate #SDGs For Technical Consultations contact email : [email protected]
Discontented Idealist... @DiscoIdealist
648 Followers 7K Following Professional Dilettante. Actual Patriot. @discoidealist.bsky.social @DiscoIdealist.mastodon.social
Surtoa @Surtoa174799
59 Followers 2K Following
Edwin G . Castro @richard_frizzy
198 Followers 6K Following lottery winner of $2.04 billion in November 2022, am giving $40,000 to my first 5k followers on here. No DMs. No instagram. No facebook ⚠️ #HelpingOthers 💵💶💷
Jürgen Kanz 🇪🇺... @JuergenKanz
524 Followers 259 Following Diplom Ingenieur | Flâneur with a critical & systemic view of the world.
Sobanke victor @sobankevictor
17 Followers 85 Following
Bonnie @Teanusmpa2vW
36 Followers 2K Following The stupid seek happiness far away,and the clever plough it under feet https://t.co/3OtVugSyF0
Blersleesm @BlersleesmAaC
95 Followers 4K Following
Steesoasn @SteesoasnWd59D
70 Followers 2K Following
Storyteller @TheNovelist
855 Followers 2K Following Forget what you’ve been taught, believe what you have learned. Pope of Peet’s Hill. Connor & Nina’s Dad! Sorrin,Jade,Gunnar’s PaPa! #WSU https://t.co/ttdmfSDsaz
Constructed World @ConstructedW
61 Followers 676 Following Exploring the quiet shifts in technology, identity, and power. Writer at Constructed World. Mapping the future as it unfolds.
Ablie jallow @LastKin97575083
305 Followers 6K Following Black white we are all one people one family poor is giving by God with God everything is possible without God nothing can be possible 🙏🏾🙏🏾😭😭😭
chengxinzhe @chengxinzhe
0 Followers 9 Following
Brain & Mind Centre @BrainMind_Usyd
9K Followers 2K Following We are at the forefront of #mentalhealth & #neuroscience #research. We collaborate across industries & disciplines to find answers to global #health challenges.
Sonutharsh @SonutharshFj9
74 Followers 3K Following
Er. Hari Prasad Ghimi... @harighimire21
14 Followers 109 Following
GALIB SARKAR @GSarkar759
84 Followers 6K Following
Andreas W. @vhsdozent
1 Followers 101 Following
POS Mujamaa @Systiemer
14 Followers 111 Following Unlock the Power of Efficiency with My Point of Sale (POS) Solutions
Lwaganda kaNgutyana �... @tshazis
1K Followers 2K Following Ek is Goed🎀 | Here for LoLs ⏰️🚘🏡🌍 A Stranger in A Strange Land
ABQozeem @AbQozeem
17 Followers 186 Following Just the truth. No compromise. Doctor of Philosophy in Mathematical Modelling, Expert in Electrical Engineering and Educational Consultant.
Victor Macias @vmaciase
2K Followers 2K Following Economist interested in Climate Change and Data (Science + Visualization). Creator of https://t.co/TGBCIFP8RT | Visual stories with data.
Yeoryios Stamboulis @YStamboulis
368 Followers 815 Following συλλάψιες ὅλα καὶ οὐχ ὅλα, συμφερόμενον διαφερόμενον, συνᾷδον διᾷδον, καὶ ἐκ πάντων ἓν καὶ ἐξ ἑνὸς πάντα. ΗΡΑΚΛΕΙΤΟΣ
Konaté Kandia @konate_kandia
57 Followers 2K Following Tron Dynamic est une entreprise de Freightech et de supply chain à la pointe de l’innovation.nous sommes passionnés par l’optimisation des opérations logistiqueOskar Boëthius Lissh... @avocade
1K Followers 5K Following Founder & CTO at @Multiply_co c/o @Norrsken_org. Startup mentor, angel, shaper, designer, clojure/rama/electric/swift coder. INTP. Postnihilism. Father of two ❤
Saras Chung @SarasChung
14 Followers 101 Following Mountain bikes, running, and graphs over time are my jam. ED of @skipdesigned. Faculty affiliate at @brownssdl. VP Professional Practice @systemdynamics_
Kate @v1N2Z0gdZU4cDUR
95 Followers 7K Following
Jesse D. Jenkins @JesseJenkins
98K Followers 11K Following Macro-energy systems engineering, optimization, and policy. Prof. @EPrinceton (MAE) & @AndlingerCenter. Co-host SHIFT KEY pod. See LinkedIn for more.
新乡重夫 @TatsuyaSekan
477 Followers 7K Following AI PM / Java SDE in FinTech. Open source contributor. Apple all product owner. Microsoft fan.
Elitsa Krumova @Eli_Krumova
63K Followers 41K Following |Digital🦄| 🏆🔝 Global Thought Leader & B2B #Tech #Influencer | #WomenInTech @Onalytica @WomenTechmakers |#AI #IoT #IIoT #ML #Robotics|#Marketing #SocialMedia|
Simsimphony @kevinrussell
1K Followers 5K Following Father, Simulation XR Strategist/Space/Medicine/Energy/BioAG, EthicalAI OS, SpatialAudio, IoT, IoA, multi-instrumentalist, Isomorphism , @itp_nyu
SD.Bystial @SD_Bystial
0 Followers 42 Following
System Dynamics Socie... @systemdynamics_
6K Followers 462 Following Encouraging the use of System Dynamics and systems thinking worldwide
Dr. Elizabeth Sawin @bethsawin
47K Followers 3K Following Director @multisolving. She/her. Systems thinking & multisolving New book: https://t.co/0eRQ1rNC8d look for me @bethsawin.bsky.social
Andrew Jones @AndrewPJones
2K Followers 819 Following Andrew (Drew) Jones, ED @ClimateInteract + @MITSloanSusty w #EnROADS. Scientific simulations as engagement, not just analysis.
Steven Strogatz @stevenstrogatz
164K Followers 3K Following Mathematician, writer, Cornell professor. All cards on the table, face up, all the time.
Zeke Hausfather @hausfath
89K Followers 728 Following "A tireless chronicler and commentator on all things climate" -NYTimes. Climate lead @stripe, writer @CarbonBrief, scientist @BerkeleyEarth, IPCC/NCA5 author
M.J. @msjalali
2K Followers 498 Following Associate Prof @HarvardMed, MGH; Senior Lecturer @MITSloan. Systems scientist, developing simulation models for population-based health problems
Climate Interactive @climateinteract
9K Followers 2K Following Climate Interactive creates and shares tools—like #EnROADS and @WorldClimate—that drive effective and equitable climate action. Retweets ≠ endorsements
Erik Brynjolfsson @erikbryn
211K Followers 5K Following Director @DigEconLab Co-founder, @Workhelix @StanfordHAI @SIEPR @Stanford https://t.co/D2bPyxoFEf
Dr. William J. Ripple @WilliamJRipple
26K Followers 9K Following Find me at Blue Sky https://t.co/UAltrGkFHt Distinguished Professor of Ecology-Oregon State University Co-Lead author "The 2024 State of the Climate Report"
Pouria (P.A) Paridar @pa_at_pa
387 Followers 656 Following Promovendus @TUDelftTBM | Researcher @PDPC21 | Ex-researcher @UCL | @BristolUni | #Simulation | #EarlyWarning | #Health | #Transportation | Cyclist
Federal Reserve @federalreserve
1.3M Followers 27 Following The official Twitter channel of the Board of Governors of the Federal Reserve System. Privacy Policy: http://t.co/pbRRCfwyou
BlackRock @BlackRock
1.0M Followers 810 Following Global asset manager. Technology provider. Helping more and more people experience financial well-being. Disclosures: https://t.co/kFpM6EpA5V
Bloomberg Economics @economics
750K Followers 2K Following Breaking economics news and analysis from @business, the first word in global business and finance. Sign up for our daily newsletter: https://t.co/0m3cdbZZdY
MarketWatch @MarketWatch
4.7M Followers 196 Following News, personal finance & commentary from MarketWatch. For customer support, visit https://t.co/Uu49STq7M6
Hugging Face @huggingface
559K Followers 208 Following The AI community building the future. https://t.co/VkRPD0Vclr
St. Louis Fed @stlouisfed
237K Followers 37 Following Official Federal Reserve Bank of St. Louis account. We share economic data and insights. Home to FRED®, @FedFRASER & @FedHistory
Andrej Karpathy @karpathy
1.4M Followers 1K Following Building @EurekaLabsAI. Previously Director of AI @ Tesla, founding team @ OpenAI, CS231n/PhD @ Stanford. I like to train large deep neural nets.
Jared Bernstein @econJaredB
2K Followers 362 Following
Garry Kasparov @Kasparov63
1.1M Followers 1K Following VP of @WLCongress. Founder & Chair of @Renew_Democracy. Activist, speaker, 13th World Chess Champion. Autocracy in America podcast: https://t.co/xemlxTR3IN
Dalai Lama @DalaiLama
18.0M Followers 0 Following Welcome to the official twitter page of the Office of His Holiness the 14th Dalai Lama®️.
Ugo Bardi @ugo_bardi
2K Followers 2K Following Increases are of sluggish growth, but the way to ruin is rapid (Lucius Annaeus Seneca) #Senecaeffect #Collapse #Ecosystem #Reptilians
wittigonia @WITTIGONIA
284 Followers 1K Following #Digital #Marketing #Strategy #Analytics #Optimization https://t.co/6tEvg81BRO
Yann LeCun @ylecun
949K Followers 764 Following Professor at NYU. Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.
Polymarket @Polymarket
634K Followers 5K Following Trade politics, news, culture, sports & tech. Discord: https://t.co/tzKrbDf7dZ Tag @AskPolymarket to get live odds.
@thkdigital.bsky.soci... @thkdigitalahead
48 Followers 532 Following inactive account - more blue sky in the future
Sen. Bernie Sanders @SenSanders
11.8M Followers 2K Following Sen. Sanders of Vermont, Ranking Member of U.S. Senate Committee on Health, Education, Labor & Pensions, longest-serving independent in congressional history.
Montana Free Press @mtfreepress
11K Followers 944 Following Montana's independent, nonprofit source for in-depth news coverage of politics, government, and other issues that matter to the people of this great state.
Montana House Democra... @MTHouseDems
2K Followers 149 Following 42 members strong in the Montana Legislature. Fighting for freedom, fairness, and affordability to get Montana back on track.
Montana Democratic Pa... @MTDems
9K Followers 571 Following Official Account. Dedicated to securing life, liberty, and the pursuit of happiness for every Montanan. 🇺🇸 Find us on IG, FB, BSky, TikTok: @mtdems!
Republicans against T... @RpsAgainstTrump
950K Followers 5K Following Pro-democracy conservatives Republicans fighting Trump & Trumpism. Please support our work: https://t.co/FkmisNic4X
Babak @BabakBahaddin
69 Followers 105 Following
Dr. Robert Rohde @RARohde
54K Followers 890 Following Chief Scientist @BerkeleyEarth. Physics PhD & data nerd. Usually focused on climate change, fossil fuels, & air quality issues.
sonia aggarwal @cleantechsonia
6K Followers 1K Following CEO of @EnergyInnovLLC, before that Special Assistant to @POTUS for Climate Policy, Innovation, and Deployment
Quanta Magazine @QuantaMagazine
347K Followers 620 Following Illuminating math and science. Supported by @SimonsFdn. 2022 Pulitzer Prize in Explanatory Reporting.
Prof. Katharine Hayho... @KHayhoe
221K Followers 5K Following Climate Scientist, Prof @TexasTech, Chief Scientist @nature_org. Join me on Bluesky @katharinehayhoe.com. Tweets 100% my own 🇨🇦🍁
Jair Andrade @jandraor
185 Followers 468 Following Engineer (@UIS), MSc (@UiB), PhD (@UniofGalway), Sherlockian, atheist & justice. #rstats. Postdoc at @Cambridge_Uni
Kelly Kortum @KellyKortum
3K Followers 3K Following Person. #mtleg Representive MT HD64. #mtpol #bozeman #netneutrality
Nathan Dugan @NathanDugan
654 Followers 290 Following Mountain town housing and climate advocate. Co-founder and President of @shelter_wf.
Montana Budget @MontanaBudget
3K Followers 545 Following The Montana Budget & Policy Center is a nonprofit organization providing research and analysis on budget, tax, and economic issues.
Don Seifert @SkyMtBlu
501 Followers 564 Following Republican in exile. Former Gallatin County Commissioner-Highwayman, Sailor, Dam Builder, Starship Pilot.
Signos @SignosHealth
783 Followers 45 Following Your Body Runs on Glucose. Stop Fixing. Start Understanding. The world's first and only FDA-cleared AI-driven app and CGM for weight management and wellness.
Dialectic Simulations @DialecticSims
172 Followers 124 Following A firm specializing in leveraging systems thinking and computer simulations to solve the hardest problems in public and private sector.
Juliette RooneyVarga @JRooneyVarga
146 Followers 135 Following Working to translate science into climate action. Earthling, educator, mom.
Dr. Leah C. Stokes le... @leahstokes
99K Followers 4K Following Prof. climate + energy policy UCSB. Alum @MIT @Columbia @UofT. Host @degreespod. bluesky: @leahstokes.bsky.social - Cuts pollution! Proudly Canadian.
Systems Innovation @Sys_innovation
17K Followers 6K Following Working on building the field of systems innovation by developing an open network for people to learn, connect and co-create... https://t.co/DMdu3q4PhY
Steve Arquitt @ArquittSteve
340 Followers 1K Following Working for a sustainable world through the application of systems modeling. A supporter of decency and reason - and Joe Biden.
T.Y. Lim @tylim.bsky.... @limtseyang
78 Followers 64 Following #DrugsAndBugs Postdoc @CCDD_HSPH, PhD @MITSloan, formerly @YaleEnvironment Complex systems & simulation modelling for public health. Standard disclaimers apply.
Ivan Taylor @ivanwtaylor
282 Followers 579 Following PhD in Public Policy, Masters in Systems Science, Retired Operational Researcher, Fastpitch Softball Player
Justin Connolly @JDConnollyNZ
202 Followers 244 Following Systems thinking for a better world. Views expresed are my own.
Braveheart Gillani @BraveheartGill1
70 Followers 295 Following
Jim Hamilton @JimHamiltonHD61
1K Followers 739 Following Former Montana Legislator. Rep. Question. #mtpol #mtleg . Grandfather to four, father to two. Hiker, biker,occasional logger.