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RA_Fisher

891 karma · joined September 14, 2012

I’m a statistician-economist and I was Zapier’s first data scientist & 9th employee.
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RA_Fisher··on Microsoft starts canceling Claude Code licenses
Ah okay, can it work on a whole repo in an agentic way?
RA_Fisher··on Microsoft starts canceling Claude Code licenses
Claude Code will write the whole thing for you. Whereas doesn’t Copilot require input along the way of coding? ie- it doesn’t do all the programming for you
RA_Fisher··on Microsoft starts canceling Claude Code licenses
Do people bring their own then (considering work doesn’t pay for it)?
RA_Fisher··on AISLE Discovers 38 CVEs in OpenEMR Healthcare Software
AI gives us a means of leverage. We can do more with less. production = f(labor, capital, technology) + eps
RA_Fisher··on €54k spike in 13h from unrestricted Firebase browser key accessing Gemini APIs
Anthropic and Claude are running circles around Google / Gemini for me these days. Anthropic was quite helpful for a while but strange limit issues started popping up. The final thread was a bug that essentially broke my ability to develop. I moved over to Claude Code full time and haven't looked back. Opus 4.6 is awesome for accelerating probabilistic programming!
RA_Fisher··on US and Iran agree to provisional ceasefire
They’ll probably receive most if not all of Iran’s focus now.
RA_Fisher··on Ask HN: How do you handle clients who don't pay on time?
I limit the risk and insist on payment upfront.
RA_Fisher··on Ask HN: Who wants to be hired? (April 2026)
Location: Brighton, MI, USA Remote: Yes Willing to relocate: Yes

Technologies: Bayesian statistics, econometrics, causal inference, experimental design, machine learning, AI systems, R (expert), Python (expert), SQL (expert), Stan/brms, PyMC, scikit-learn, tidyverse, PostgreSQL/Redshift, AWS, Airflow, Ansible, Terraform

Résumé/CV: https://statwonk.com/about/

RA_Fisher··on CEO of largest public hospital says he's ready to replace radiologists with AI
That’s good, reducing healthcare costs will increase access and boost the our health.

Agree that AI should replace CEOs. They’re often biased in unhelpful ways that AI isn’t and it costs people wellbeing.

RA_Fisher··on Walmart: ChatGPT checkout converted 3x worse than website
True, though I don’t think they’re too different on that dimension.
RA_Fisher··on Hamilton-Jacobi-Bellman Equation: Reinforcement Learning and Diffusion Models
AI makes it easier to catch up. :)
RA_Fisher··on Walmart: ChatGPT checkout converted 3x worse than website
I use AI to shop and it seems easy for an AI to understand when that’s the case (they can do statistics and physics after all).
RA_Fisher··on US SEC preparing to scrap quarterly reporting requirement
I think they'll keep the status quo of quarterly, bc if any announce switching I'd expect their stock value to fall (bc in my mind the decision would transmit more bad potential than positive potential for future earnings). ie- I don't buy that quarterly reporting drives too short-term decision-making (or that it's generally too short).
RA_Fisher··on Show HN: Prompt Enricher – paste a rough prompt, get a structured one back
I built this after noticing how much variation there is in AI output depending on the quality of the prompt. Models matter a lot — but even the best model underperforms when the prompt is vague. Enriching the input is one of the highest-leverage things you can do.

Most prompts are drafted in 10 seconds and sent. They're missing context, constraints, a clear objective, examples. The model fills in the gaps with whatever it wants, which is why the output often feels generic or off.

Prompt Enricher scores your prompt across 5 dimensions (the YIELD framework: Your Objective, Input Context, Expectations & Constraints, Layout of Output, Demonstrations/Examples), then rewrites it with the missing pieces filled in. It also produces 4 variants — Packed, Quality, Concise, and Reliable — so you can match the enriched prompt to your use case.

The "Show Changes" diff view that highlights exactly what was added (green) and removed (red) — so it's immediately clear what enrichment actually did to your prompt.

RA_Fisher··on Labor market impacts of AI: A new measure and early evidence
Does that extra work bring in more revenue? I think that’s the key question.
RA_Fisher··on We tasked Opus 4.6 using agent teams to build a C Compiler
Progress can be reviewed over time, and I'd think that'd take a lot of the risk out.
RA_Fisher··on How AI assistance impacts the formation of coding skills
I’m a fan of using a variety of methods to teach, no issue with that. My issue is with teachers that don’t admit how the world is changing. Dinosaurs.
RA_Fisher··on How Jeff Bezos Brought Down the Washington Post
What seems false?
RA_Fisher··on The Codex app illustrates the shift left of IDEs and coding GUIs
I use them to probabilistically program. They’re better than me and I’ve been at it for 16 years now. So I wouldn’t say they’re superficial at all.

What have you tried to use them for?

RA_Fisher··on The Codex app illustrates the shift left of IDEs and coding GUIs
Claude, Codex and Gemini can read code much faster than we can. I still read snippets, but mostly I have them read the code.
RA_Fisher··on How Jeff Bezos Brought Down the Washington Post
Agree, if Bezos hadn’t alienated the readership, they’d probably be doing well.

I used to look up to him before he became an obsequious traitor.

RA_Fisher··on How AI assistance impacts the formation of coding skills
Very fair. I think even more we underestimate our own sentimentalities. eg- the teacher that believes adding or multiplication has to be done a particular way (like the standard algorithm vs. partial products).
RA_Fisher··on How AI assistance impacts the formation of coding skills
I think learning arithmetic is a good idea, but it’s only a part of computation. I don’t think we should get too hung up on a particular method of computation (bc there’s so many ways).
RA_Fisher··on The Codex App
It’s possible to run up to 4 agents at once vs. Claude Code’s single thread. Sometimes I’ll find meaningful quality differences between what agents produce.
RA_Fisher··on How AI assistance impacts the formation of coding skills
That reminds me of when teachers would say: what if you're without a calculator? And yet we all have smartphones in our pockets today with calculators.
RA_Fisher··on How many chess games are possible?
Infinite. :) Chess is strictly unbounded.
RA_Fisher··on Heathrow scraps liquid container limit
Very true. The queues need to be improved.
RA_Fisher··on Heathrow scraps liquid container limit
Exactly, air security has actually done a really good job over the last 25 years. I hope they keep improving it.
RA_Fisher··on When employees feel slighted, they work less
Econometrics allows us to understand and measure these things. This result isn’t surprising at all. Treating employees well has a similar effect in improving productivity.
RA_Fisher··on Claude Cowork exfiltrates files
If they made it clear when skills were being used / monitored that, it'd seem to mitigate a lot of the problem.
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