Mark Hudson

1.2K posts

Mark Hudson

Mark Hudson

@mark_bikes

Katılım Temmuz 2021
269 Takip Edilen17 Takipçiler
Matthew Yglesias
Matthew Yglesias@mattyglesias·
Voters are understandably angry that Trump is taking steps to push the cost of living up rather than down, but in his defense (?) the impact of the Strait closure has genuinely been much milder than most experts thought it would.
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Adam Ozimek
Adam Ozimek@ModeledBehavior·
Do we regard the Craiglist experimental business model to be failed at this point? Is there anything you go there for rather than FB marketplace or some other dedicated platform?
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Mark Hudson
Mark Hudson@mark_bikes·
@AgnesGueco @LorentLouise You are very lucky your ancestors did not apply this kind of absurd standard to their child bearing decisions
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Agnes Xavier Gueco
Agnes Xavier Gueco@AgnesGueco·
@LorentLouise Consider that your husband’s classmates in graduate school were much more responsible than you for not having children when money was tight, no support system and daycare was more than rent.
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Louise Lorent 🦬🦬
Louise Lorent 🦬🦬@LorentLouise·
We had our first child when my husband was in grad school. Money was tight, time too, daycare cost more than our rent (yes I had to work FT), "support system" inexistent. None of that really mattered. What made it *really* hard was that all the young people around us
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John Ganz
John Ganz@lionel_trolling·
Think what you will about me, but I did not have a fancy internship when I got into this racket, I had a twitter account and opinions, and the Baffler was one of the earliest places that was willing to just publish me. If there are no places like that, it's just corporate media
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John Ganz
John Ganz@lionel_trolling·
One more thing about the Baffler: when I first wrote for them, I had like literally no bylines, I was some guy off Twitter, and they were not snobby about it at all: they were like, " Okay, sounds interesting and published it. The editors were great.
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Mark Hudson
Mark Hudson@mark_bikes·
@Brady_H Is this based on anything or are you kinda just saying any slow time is the same to you?
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Brady Holmer
Brady Holmer@Brady_H·
If you are running a marathon in 4+ hours, you don’t need (nor do you benefit) from super shoes. Certainly not a 4% economy gain. I’d argue 3:30+ marathon pace probably gets limited benefits vs. standard trainer.
Dave@UnFatDavid

@Brady_H @Mark_Sisson I am of the opinion that there is a certain point where they are no longer worth it. I have no scientific data, but I don’t see the benefit to wearing them if your marathon time is 4 hours plus.

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Nathan 🔎
Nathan 🔎@NathanpmYoung·
You are in a room with one other person. They are behind frosted glass. You both have the standard red and blue buttons applying only to the two of you. They seem awake and alert. You are not permitted to communicate. What do you press?
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Paul Novosad
Paul Novosad@paulnovosad·
For every Math Olympiad team member, I'm curious how many kids are there with as much capability, but never had a chance to take advanced math, went to a school without a math/club team, never even knew doing harder math at their age was a possibility. Is it 10? 100?
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Mark Hudson
Mark Hudson@mark_bikes·
@Brady_H Glad you acknowledge this after how excited you were about that idiot running 2:35 or something in jeans
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Greg Burnham
Greg Burnham@GregHBurnham·
For button pressing, who's got a good mental coin flip? Mine is: pick a small-ish integer n, pick a quote I know by heart, find the nth word in the quote, the coin lands heads if that word has an even number of letters.
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Mark Hudson
Mark Hudson@mark_bikes·
@vincempls @MetroTransitMN Yes apparently it randomly doesn't have signal priority at some lights. Please keep digging/advocating on this! It should be much faster.
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Vince Mpls
Vince Mpls@vincempls·
This afternoon, as with most afternoons, the busy @MetroTransitMN E Line is maintaining planned 10 minute frequency by running 2 buses every 20 minutes. Not ideal. The bottlenecks are definitely due to the lack of dedicated lanes, esp in Uptown, but maybe also signal priority?
Vince Mpls tweet media
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Mark Hudson
Mark Hudson@mark_bikes·
@NortonMpls @PatrickFIanagan “You’re putting a lot of work into this” is a real loser thing to say in an argument. Sounds like his position might indeed have more support than yours?
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Mike Norton
Mike Norton@NortonMpls·
@PatrickFIanagan You’re really putting a lot of work into this. I agree that the quote doesn’t specifically say cops aren’t attempting to make arrests, but we exist in the context. Arrests ultimately aren’t being made, just excuses.
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Mark Hudson
Mark Hudson@mark_bikes·
@NortonMpls It is insane but is it wrong? Seems the prosecutors might be kind of insane.
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Mark Hudson
Mark Hudson@mark_bikes·
@Amonahan I didn't get interviewed at most trading firms. Got the (internship) offer at JS. 😂 So it goes for math PhDs....
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Alex Monahan
Alex Monahan@Amonahan·
I got job offers @ most trading firms Jane Street I didn't get past the 1st interview 😅
Deedy@deedydas

Jane Street made ~$40B in 2025 with 3,500 employees, a ~2x from the year before. At ~65-70% profit margin, that's $8M profit / employee, the highest for a 1000+ ppl company. High-frequency trading continues to be the most efficient money making engine. I want to share an old story about my Jane Street interview in 2014. Jane Street was known for hiring a lot of math, physics and CS olympiad winners from top universities and putting them through many rounds - including, for trading roles, a gauntlet of mental math. It was my 6th interview and my final round and I recall being asked "What is the next day after today in DD/MM/YYYY where all the digits are unique?" They'd toy with you and say "You can use a pencil and paper, if you want" but you knew that was an instant no. Painstakingly and as quickly as I could, I came to an answer. "How confident are you that this is correct on a 0-1 probability scale?" the interviewer said. "0.95", I blurted out, not fully knowing how to answer that. "Are you sure?" After thinking harder for a few more seconds, I realized I could've flipped the digits around to get a closer date. I gave the interviewer my answer. It was correct. "0.95 huh?" he chuckled. That's when I knew I failed. Note: fwiw, other companies that come close in efficiency are - Tether ($90M+ profit/emp) - Hyperliquid ($80M+ profit/emp) and on revenue: - Valve ($50M/emp) - OnlyFans ($37M/emp) - Craigslist ($14M/emp) - Anthropic ($12M/emp, run rate) - OpenAI ($8M/emp, run rate) For comparison, Nvidia is very efficient at scale and is $4.4M/emp.

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Mark Hudson
Mark Hudson@mark_bikes·
@W98AB Yup the largest eigenvalue of the Fibonacci sequence is the golden ratio which happens to be pretty close to the mile/km ratio
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Bill
Bill@W98AB·
Just learnt you can use the fibonacci sequence to approximate miles to kilometers 🤯 cant believe I did not know that before. On the lower numberrs not great, but 3m - 5km, 5m - 8km, 8m - 13km. It works pretty well
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Mark Hudson
Mark Hudson@mark_bikes·
@Predamame In fairness to him, he wrote this right before the shoe technology breakthroughs and it still didn’t happen before he was 50 (though it did before 65).
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Jane Coaston 🏔️
Jane Coaston 🏔️@janecoaston·
what gets me is that this means he can stay in zone 3 while running at that pace. like, he can keep a heart rate of 155-160 while running 4:30 repeats for two hours.
Ev@EvanMadders

@janecoaston I am a pretty damn good runner compared to the average person, when I started running I ran a 5k in 30 minutes, after years of work I can run a 5k in 21:05 Sawe just AVERAGED a 14:10 5k.

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Mark Hudson
Mark Hudson@mark_bikes·
@MTabarrok bad take man. You're just gonna let half of all babies/small children die?
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Maxwell Tabarrok
Maxwell Tabarrok@MTabarrok·
blue is the selfish choice here if you throw yourself into danger and rely on the sacrifice of others to help you escape even though you could have easily saved yourself, that is extremely selfish
Tim Urban@waitbutwhy

Everyone in the world has to take a private vote by pressing a red or blue button. If more than 50% of people press the blue button, everyone survives. If less than 50% of people press the blue button, only people who pressed the red button survive. Which button would you press?

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Mark Hudson
Mark Hudson@mark_bikes·
@lymanstoneky There is no "murder" involved in pressing blue. You can ungenerously call it "suicide" but how could it possibly bring about the death of anyone else? I'm not sure you understand the scenario.
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Mark Hudson
Mark Hudson@mark_bikes·
@lymanstoneky Button A is supposed to represent Blue? No one who "chose to live" dies; pressing blue can only kill yourself -- no one else.
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Mark Hudson
Mark Hudson@mark_bikes·
@LinkofSunshine There is actually not enough information in the stated question to determine an answer and the 99% answer is technically possible.
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Basil🧡
Basil🧡@LinkofSunshine·
The most worrying poll I’ve ever seen is one when they asked doctors “1% of the population had disease X. The test has a 99% accuracy rate. If someone tests positive for disease X, what are the odds they’re have disease X” And like 95% of doctors said ~99%. This is their job.
Mary Radcliffe@marywitha4

Sigh.

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