@SamBabichenko

I like math. Quantitative analytics @wellsfargo. Views/Opinions are my own and not my employer's

 Charlotte, NC
sbabichenko.com
Joined May 2018
  • Tweets534
  • Following855
  • Followers189
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Sam Babichenko 🇺🇦 retweeted
alz
@alz_zyd_Aug 4
A puzzling thing about all this grocery uproar: - Roughly 6-8% of the median US household's income is spent on groceries, so like $4000 a year - Even if applied to literally all groceries a person buys, a 15% discount is like $600 a year, which honestly is... kind of pathetic?
Clay Travis
@ClayTravisAug 3
New York City will require IDs to prove you live in the city in order to shop in the city owned grocery stores. So you need an ID to shop in the city’s stores, but it would be racist to require an ID to vote. Perfection.
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Call me Dr. Sam Babichenko PhD MA BS AS AS AS GED
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Sam Babichenko 🇺🇦 retweeted
Mini Modu@MinModulationMay 2
you can also remove the W entirely and also get your answer
le.hl
@0xleegenzMay 1
Me realizing that if you replace the "W" in "What", "Where", "When" with a "T" you will answer the questions
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Fostering some really cute kittens
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I've made a little blog post about using partial pooling to carefully estimate interaction effects for linear models. Here it's for estimating alpha in factor models, but the technique is fairly general and can be improved on. May edit in the future. sbabichenko.com/writing/part…

Partial Pooling for Estimating Interaction Effects in Factor Models

Every additional filter halves the sample again. Each one has a cost. We want to estimate the abnormality of the returns without leaving food on the table.

sbabichenko.com
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The novelty for interactions is that there are multiple ways to refer to similarity (a lattice of ways), which each give a new mean datapoint, so I added a simple heuristic fix to keep everything working,
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I might do a crude alpha estimation example for the next post, but I'm also thinking of writing a post about using partial pooling as a way to speed up the double descent phenomena by treating it as a pooling parameter estimate for overparameterized models
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Sam Babichenko 🇺🇦 retweeted
🖤Adelaide🩶@BreadstickMommy30 Aug 2025
this is a ham. would be a shame if someone put an s and an e next to it
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I've been doing a lot of thinking and I feel like the goal of learning any advanced topic is to better understand the basics. One of my favorite stories is that a chef's hat represents the number of ways they can cook an egg. I don't see the opportunities a chef does when I look
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at eggs. As I get better at modeling, I add stripes to my hat, maybe not for eggs but for linear regression, differentiation, approximations... I get a new perspective of an old friend, and I wouldn't want to experience mastery in any other way
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Replying to @__paleologo
@__paleologo
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a plethora of rabbit holes to fall into, and an excitement for the future. I can only recall one other event that has caused me to feel this way, and I use it to divide my life between before and after. It’s too early to speak in absolutes, but reading your book has already
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Dramatically changed my life. I feel proud to have it on my bookshelf and in my hands, and I feel proud to have my name in the acknowledgements. I have a lot more to say, but for now, thank you. I feel grateful for you and your work, and the tidbits you post on X.
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Sam Babichenko 🇺🇦 retweeted
Thiha Aung@taung009 Dec 2024
Yes!
Caglar
@caglar_ee8 Dec 2024
Video lectures, Probability Theory by Todd Kemp mathweb.ucsd.edu/~tkemp/Prob… UC San Diego Math 280A Probability Theory I youtube.com/playlist?list=PL… UC San Diego Math 280B Probability Theory II youtube.com/playlist?list=PL… UC San Diego Math 280C Probability Theory III youtube.com/playlist?list=PL…
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Sam Babichenko 🇺🇦 retweeted
Agus 🔸
@austinc330121 May 2024
Ok this paper is a huge breakthrough in Mechanistic Interpretability. This is wild, I'm so happy A small explanation in thread
henry
@arithmoquine21 May 2024
WAKE UP BABE NEW ANTHROPIC BANGER MECHINTERP PAPER JUST DROPPED
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Sam Babichenko 🇺🇦 retweeted
Visakan Veerasamy
@visakanv17 Mar 2024
this is a 1996 guide on how to help someone use a computer. it’s strikingly resonant with ‘how to be a parent’, or really ‘how to help anyone with anything’. a nice example of “the universal within the particular”
Omar Rizwan@rsnous28 Jan 2024
Replying to @tylerangert
pages.gseis.ucla.edu/faculty…
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Sam Babichenko 🇺🇦 retweeted
owen cyclops
@owenbroadcast11 Feb 2024
i grew up outside a large city. around thirteen, i became vegan (sorry). when i told people around me that cows make milk after becoming pregnant, like humans, everyone told me i was very stupid and misinformed. they all thought there was zero analogy - cows just made milk.
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