Assoc Prof at CES @SNFAgoraJHU Affiliate @CASBSStanford; member @coreeconteam. Previously @BristolUni @smithcollege, @RHULEcon & UCT. My views đź’—đź’śđź’™

Joined November 2009
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Great to see this write-up of my microeconomics textbook w/ Sam Bowles. It was published in July by @OxUniPress You can see details & free pdf at my website here: simondhalliday.com/microecon… or at OUP here: global.oup.com/academic/prod… Some Endorsements quoted below. 🧵 (1/8)

A new #economics textbook by SFI Prof Samuel Bowles and Simon Halliday (@BristolUni) upends convention and offers a new, more engaging way of teaching the subject — one that actually acknowledges #inequality, #climatechange, #sustainability, and #poverty: santafe.edu/news-center/news…
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Simon D. Halliday retweeted
If you’re an undergrad or recent grad (or know one!), we invite you to Camp Abundance, a free conference in Washington D.C. from July 31-August 1, hosted by Students for Abundance. Join 100 young people from all across the country interested in making America work (1/4)
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Reading my copy of @WorksInProgMag #23 on plan to LAS. Strong overlaps with talks on how to AI-proof your teaching w/ @Afinetheorem @matthewgburgess & others: reporting for stories on UK nuclear, ASML, freezing eggs, & others hard to do w/o phone calls, dirty hands=>originality.
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Simon D. Halliday retweeted
Just back from a great workshop co-hosted by @rootsofprogress and @SNFAgora. Thanks for organizing, @jasoncrawford. And thanks for moderating the discussions, @simondhalliday.
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I'm not on the hiring committee for this, but I have worked closely with CORE (I'm on the CORE Editorial Board and working on a new CORE textbook). I'm happy to field questions related to it from credible candidates. @sndurlauf @sfiscience Please RT if you wouldn't mind :-)
We're hiring a Postdoctoral Research Fellow in Economics Education and Inequality, jointly hosted by CORE Econ and the Stone Centre network. 12-month position starting September 2026. Deadline: 22 May 2026. Details and how to apply: tinyco.re/3618199
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One of the things we’re doing at @HopkinsCES and @SNFAgora is thinking through what education and pedagogy around progress, civics, and the C21st look like. Really happy to be a part of this collaboration.
Replying to @rootsofprogress
Three keynote course presentations: -- @Afinetheorem (U of Toronto): Progress, or How Big Things Get Done -- @simondhalliday (Johns Hopkins): New first-year seminar on progress -- @matthewgburgess (U of Wyoming): American Economic Success Other talks and discussion sessions on law, regulation, and abundance; maintaining progress; industrial policy; progress in medicine, and more.
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Simon D. Halliday retweeted
I really think that the public's understanding of how data centers physically interact with their communities is bordering on a low level mass delusion. The actual numbers and impact just do not at all bear out how people feel about them.
Days after voting in favor of a new data center in Indianapolis, Councilman Ron Gibson says his home was struck by 13 gunshots while he and his family were asleep. He says a handwritten note reading “No data centers” was found under the doormat.
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In the original paper, this video comes to mind (post hoc ergo prophet hoc in the West Wing). youtu.be/HL_vHDjG5Wk?si=hGyE… See Kai Gehring’s piece as recognizing this concern.
So annoying sth like this gets published that is pure selection bias. If you want to understand what I mean, look at this graph from our paper: Countries contract and are on a declining path when they get an IMF program, not because of it. Evidence on programs is much more mixed.
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Simon D. Halliday retweeted
What if the most important thing an economics research lab could produce was not a paper but a novel? Karen Jennings wrote First of December as a writer-in-residence at our lab, @LEAP_SU It follows three people in the final days before slave emancipation at the Cape in 1838. The aim was to carry research on Cape Slavery far beyond the academy. South Africa’s history of slavery remains locked up in archives that almost no one opens. What would it take to resurface it in everyday conversation? A novel might do the work that no academic paper could. First of December will be released in the UK on 26 March and in South Africa in August.
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Che meraviglia!! Azzurri!!
𝙉𝙚𝙡𝙡𝙖 𝙨𝙩𝙤𝙧𝙞𝙖𝙖𝙖𝙖𝙖𝙖𝙖𝙖 💙 #ITAvENG #Italrugby #insieme #rugbypassioneitaliana
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Simon D. Halliday retweeted
I have to hand it to anti-medicine influencers. They are very, very, very clever about bullshitting their audience. Statins are a popular drug, with a low side-effect profile for most patients, which have been repeatedly shown to reduce the risk of cardiovascular disease, the most common cause of death in most developed countries. So, how the hell do you argue against statins? By creating a highly specific scenario and reporting the benefit in extremely tendentious terms. More than 90 percent of people who have a heart attack don't die of a heart attack within the next 5 years. So if you ask "how much extra life will a statin give you in those 5 years?" the answer will be small. You can make it seem like statins don't do anything by analyzing their life-saving effect within a population group that mostly isn't going to die, anyway! The below is like saying, "if you wear a bike helmet for a year after being in a bicycle accident, it only increases your life expectancy by 19 minutes." Well ... haha, yeah! You have framed the scenario in a perfect way to make bike helmets look worthless! Very clever!
Dr. Aseem Malhotra: "If you take a statin for 5 years after a heart attack... in that 5 year period, how much would you think or hope it would add to your life expectancy?" Joe Rogan: "25%? 30%?" Malhotra: "Just over 4 days."
Community note
More than 90 percent of people who have a heart attack don't die of a heart attack within the next 5 years. So if you ask "how much extra life will a statin give you in those 5 years?" the answer will be small. Published work shows overall benefit of multiple months to a year: doi.org/10.1371/journa…
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File under “yet another reason my courses include oral exams” (yes I know I’m privileged to have classes small enough to manage this). Also that’s not the only thing I do but I do think they should be more widely adopted.
As @alexolegimas noted in the comments, if your class is set up such that this is a problem, you haven't been paying attention. We're in year 4 of "stop giving take-home assignments that matter". But also: AI can let you run a much *better* course than pre-AI! 1/2
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This summer program is where I met Kevin (and a bunch of fantastic people I’ve remained in touch with subsequently). It’s an excellent program. I still refer to papers and books I read during the program in 2011. Highly recommend it.
PhD students interested in the history of thought: you must apply to Duke's HOPE summer program. I went twice as a grad student! You can't be a scholar without knowing the history and historiography of your field, and this is the best place to get the basics.
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Simon D. Halliday retweeted
PS - Folks in CA or NY ought care that your states have net migration numbers similar to Bulgaria to EU? You have booming economies & because nothing gets built, it's all wasted. Rule of thumb: you're in charge in a state shedding population, you don't get to run for natl office.
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Simon D. Halliday retweeted
For a half-century, America has critically under-built family-sized housing in our most dynamic cities and neighborhoods, rendering them childless and unaffordable. It's time to save the American Dream. Introducing The American Housing Corporation.
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Simon D. Halliday retweeted
Some countries that have prosecuted or threatened to prosecute central bankers for the purpose of political intimidation or punishment for monetary policy decisions: Argentina, Russia, Turkey, Venezuela and Zimbabwe.
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Simon D. Halliday retweeted
My forthcoming book, CHASING FREEDOM, has been named by @ForeignPolicy as one of the 30 biggest releases in foreign affairs, history, and political science coming out in 2026! Available for pre-order here: lnkd.in/ekvvzJPA
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Strongly recommend applying for this. Link in the next tweet.
I'm hiring another editor to join @IFP's editorial team. I think it'll be hard to fill this role, for a few reasons (no particular order):
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