Rachel Bui (@buirachel) header
Rachel Bui (@buirachel) profile picture

Zen economist living a filmmaker’s life building startups. AI, biotech, aerospace, stories. Building decision intelligence infrastructure @tikaruworld @aireslab

Earth
Joined February 2009
Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)Photo by Rachel Bui (@buirachel)
“Art on all levels is just technology.” - George Lucas This old interview is so raw and honest. youtu.be/6jWtbJxzGpQ?si=ZiD-…
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Many elite performers have a strange blind spot where they massively underestimate how good they are. The work feels easy to them, so they assume most people could do it with a bit of effort. We’ve seen founders get confused and angry when senior hires can’t keep up, and this makes them impatient and frustrating managers early on. But this same blind spot is also a massive edge; because they don’t realise how rare their ability is, they don’t realise how ambitious their goals are either, and thus they attempt things most self-aware people would instantly rule out. More broadly, this trait could be called “anti-ego”; a deep-seated inability to realise or acknowledge they are more capable than almost anyone.
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This is what happens when you have dei in tech 😅
pov: training everyone’s muse to dance before our launch this week
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The US can start having universal care for a defined list of rare diseases at public institutions @mcuban, this would theoretically reduce insurance premiums and then gradually extend the subsidy to elective surgeries while still have private insurance coverage (for additional capacity) as complementary to divert some of the pressure off the government budget. This is what Australia did. It gives people choice as a full universal care model subsidised by government would lead to long waiting times and inefficient queuing.
For those who say it’s time for universal care. I am all for it. It would be nice if we could find a way to reduce the cost of care and make it available to everyone, for anything. But it will take work to get there. Other countries with Universal Care make “Most Things available to All People”. It’s not perfect. In our country, we make “Everything available to Most People”. The question for this country, unlike others, is how we can make the best possible care and therapies, regardless of cost, to everyone ? Read @AbdulElSayed ‘s book on Medicare for All. He wisely had more questions than answers. Medicare for All ? Global Budgets ? Or something else ? It’s a difficult path from where we are to “E4E” Healthcare. ?Everything for Everyone) My hope is that we can put together a Simpson Bowles type, Blue Ribbon Commission. One that includes representatives of all stakeholders. From all different type of patients. Including rare disease parents. Rural and Urban Hospitals. The most expensive hospitals that offer unique care. Pharma companies that offer everything from genetics to Cell and Gene Therapies. You get the point Some people think we can just tell all those working in the healthcare system what to do. That’s the fastest way for this to fail. We need to be as close as we can to being on the same page. And we need to figure out a non partisan manner of running our American version of Universal Care. No reason we can’t start now
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Rachel Bui retweeted
“Hong Kong” Single Artwork by : Christopher Doyle
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After seeing today's 18%+ drop in $RBLX, which is by far my largest position, I decided to post this thread.
1/ Every great investment I know came with a gut punch. Roblox. BYD. Carvana. Even NVIDIA. If you can't sit through a 70% drawdown, you don't own a compounder. You rent it. 🧵
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Agent-Based Modeling: Worlds Within Worlds, a new interactive story from the Santa Fe Institute, chronicles the rise of ABMs in the social sciences, with a focus on SFI contributions. Over the next few weeks we’ll highlight pieces of this story. First, how it begins: PART 1: In a former convent in Santa Fe in the late 1980s, economists, physicists, and computer scientists scribble equations on a blackboard where an altar used to be. They are  discussing a promising new approach to scientific modeling, one that represents individual actors in, say, an economy or a pandemic, and the rules those “agents” follow. Today, the method — known as agent-based modeling — offers powerful insights for predicting financial crises, managing pandemics, and even uncovering truths about the past. Read the full story and run the models yourself: santafe.edu/abm
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This is why universal basic income isn’t going to work without some basic means testing but people are really confusing the issue and focus too much on distribution instead of productivity.
The ugly truth about France and some of the other European countries currently in turmoil - and which none of the politicians want to admit because it'd be political suicide - is that you can't solve the problem by going after immigrants (as the right asserts) or the rich (as the left asserts), but you could solve it by going after the old. One extraordinary statistic for you: people over 60 in France, a quarter of the population, own 60% of France's wealth, non-financial and financial (ofce.fr/pdf/revue/2025/3-192…). And here is another crazy statistic: that same quarter of the population, those above 60, receive nearly two-thirds of all social spending by the French government (previssima.fr/actualite/prot…) - which is famously among the highest in the world (France's government spending is an insane 57.3% of GDP). Last statistic: they make up about 40% of voters because they're a third of registered voters (insee.fr/fr/statistiques/266…), and they turn out far more than anyone else (franceinfo.fr/elections/sond…). Put our 3 statistics together and there's almost a bit of an apartheid situation here: the old own most of the country's wealth, collect most of the social spending and have the political power to keep it that way. Which makes them a de-facto rentier class, living off assets and transfers paid for by younger generations. And, of course, at the risk of stating a truism, the future is built by the young. Yet France keeps effectively taking money away from them to give it to those whose working lives are already behind them - and need the money far less since they already own the country's wealth. What about inheritance, I hear you ask? That's the funniest/saddest aspect: given that life expectancy has kept rising, the French now inherit a home at 54 on average. The most common case is someone in their 80s leaving it to heirs in their 50s, in effect the very old transferring wealth to the about-to-be old (insee.fr/fr/statistiques/fic…). You can add this to our earlier apartheid statement: on top of all the rest, even when the old finally let go of their wealth, it stays within their own "camp". That's my personal situation, incidentally: I'm 42, my father is 71 and he is starting to look at ways to pass things on to me and my siblings, when our professional lives are already well settled, so it'll arrive when it changes things the least, which is pretty much the French system in a nutshell. Now, I get that there'd be some unfairness in going after them: they paid into the system their entire working lives, playing by the rules of a social contract that told them if they paid up they'd collect at the end. Changing the rules now means breaking that promise, which is admittedly unfair. But there's no magic wealth tree in any society: you can only take it where it is. That's the way most major societal transformations end up happening. They're often triggered by a catastrophic event (the so-called "four horsemen": mass-mobilisation war, revolution, state collapse, plague) BUT what really drives change is a transfer: wealth gets pried from the privileged class who've been sitting on it and handed to those who'll build what comes next. So, in theory and in an ideal world, you can do without the catastrophic event and directly proceed with the transfer... The fact that in France, and elsewhere in Europe, it's the youth protesting is probably no coincidence - even though they don't frame it as a generational fight. And even though, cruel irony, the left politicians many of them march behind promise to bring the retirement age back to 60 (lcp.fr/actualites/legislativ…), which would make the situation even worse. Let's say they understand intuitively that the system is stacked against them, even if they haven't yet figured out how. And politicians are obviously doing what politicians do, meaning pandering to the people who actually vote, while pointing the young towards easier - and politically convenient - scapegoats. To be clear I'm not saying it's the only problem in France, VERY far from it. I'm also not saying that all old people in France live a lavish lifestyle at the expense of younger generations: there are also plenty of very poor retirees who, if anything, would deserve more. What I am saying is that it's probably the biggest elephant in the room: everyone can see it, nobody dares mention it - no politician, from any side, wants to run on cutting grandma's pension - and it makes every other problem harder to fix.
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An ideal society shouldn’t be based on what type of political leader it has. What’s more important: Strong rules. Strong property rights. Strong competition. Good education. Good infrastructure. Low discretion. High entrepreneurial freedom.
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How is the internet less private than in 2006, when the whole family shared one computer? Back then, the internet was weird, personal, and all of ours. So, we got your favorite meme legends back together to say it louder: What happened to the internet? 1/3
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Just so beautiful. “Anytime it felt this good It ends in tragic songs I'm so used to whether it changes So if you ever change your mind I'm waitin' in Hong Kong 🇭🇰 “ youtu.be/YBhL2a7CKYQ?si=i_bR…
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Love this ♥️
Hardware looks scary until you break it down into small steps. So I built an app that takes you through Arduino one circuit at a time. Made with Opus 5.5 learn-arduino-red.vercel.app
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someone please explain what positive spillovers a folding phone has on society?
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Thanks @elonmusk for your initiative — let’s get the ball rolling for kids guys.
Replying to @MichaelDell
Michael, you should really encourage others to do the same and invest in the next generation. The best thing the Australian government did for its people is to mandate its people (especially the vulnerable) to save via the form of superannuation.
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为什么我认为中国古代最伟大的皇帝是宋仁宗? 因为他打破了“帝王必须铁血无情”的魔咒。 他打仗不算强,但维持了四十年和平,让百姓免于战火; 他脾气极好,被包拯喷一脸唾沫也只是擦擦袖子继续听; 他极度克己,半夜想吃口烤羊肉都怕连累御厨每夜宰杀而强忍; 他不搞文字狱,一手养出了苏轼、欧阳修、范仲淹、王安石、司马光组成的“大宋全明星天团”。 他死的时候,京城连乞丐都在哭,死对头辽国皇帝也为他痛哭流涕:“四十二年不打仗了啊!” 秦皇汉武的伟大,是用万民血汗铸就的帝国霸业;而宋仁宗的伟大,是让活在那个时代的普通人,拥有了最珍贵的平安与尊严。
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I never tell people my ambition because they will 🤯 but what I want to do with my life is to identify important problems that institutions aren’t solving, build the organisations and technologies necessary to solve them, and spend my life moving between domains where I think I can make a meaningful difference.
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What’s your thought on flying cars @elonmusk? Is it productive for society? Should we bring it into existence?
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Definitely true, learned some hard lessons 😅
If you care about biotech and drug development watch this interview with Matt Gline, the CEO of Roivant, a biotech firm that is now worth $24 billion. He talks about why he thinks predictions about AI from people like Anthropic’s Dario Amodei are overly optimistic. “If Dario is right and I'm wrong, and he cures every disease in five years, man, are we all the winners from that outcome,” Gline said. “I think if you work in this industry, it is very hard not to be skeptical of any of those claims. Because, and I've said this in other settings recently too, biotech is a wood chipper that like is built to like ingest souls and shred them. It's just like such a hard business that like someone comes and they're like, oh, but I've built a computer and I'm going to push a button and all of that goes away and it just works. Like that is probably not the way that's going to go.”
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Princeton denied her tenure.
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Rachel Bui retweeted
People often ask why today's tech wealth doesn't go towards more public works, like libraries, universities, and museums during the late 1800s. As far as I can tell the answer is that they would literally not be allowed to be built. In 2014, George Lucas, a long-time Bay Area resident who built Lucasfilm in the Bay, wanted to build a museum in the Presidio as a gift to the people of San Francisco, to be personally funded to the tune of ~$700 million. The Presidio Trust rejected it. He then tried to build it in his wife's hometown of Chicago, but local nonprofit Friends of the Parks sued and held the project up for two years, long enough for Lucas to give up on the city. The Lucas Museum of Narrative Art will finally open in Los Angeles next month after more than a decade of planning, eight years of construction, and over $1 billion personally spent by Lucas. Meanwhile, San Francisco has built no major museum projects since the 2016 expansion of SFMOMA, and no new libraries since the North Beach Branch in 2014. Public works, like so many other things, are bottlenecked not by donor will or available funding but by vetocracy
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