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Emily Riederer

@emilyriederer.bsky.social
9.5K followers 4.3K following 685 posts

Here for data, data science, analytics engineering, rstats, books

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David M. Perry @lollardfish.bsky.social · 29/09/2026
Bluesky, the app for books
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Emily Riederer @emilyriederer.bsky.social · 28/09/2026
Had so much fun chatting with @lucystats.bsky.social and @sarahlotspeich.bsky.social about gnarly real world data wrangling — from elections to EHRs and beyond! Show link below! Meanwhile, I’m live-posting of my latest civic data eng sidequests here bsky.app/profile/emil...
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Emily Riederer @emilyriederer.bsky.social · 28/09/2026
Yes, I would judge you for bringing iced coffee to an interview. But only because diluting previously hot brewed coffee with ice cubes is definitionally weak. Bring cold brew to show me you understand good things take time and are worth upfront investment. That’s a builder mindset
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Emily Riederer @emilyriederer.bsky.social · 27/09/2026
CFP for @causalscience.org closes on Wed! Selfish reminder to submit so I can watch your talk 🍿 Also remember to register; always closes before conf! IMHO everything you need to know about any flavor of DS can be learned from causal thinking (One day I will finish my drafted post on this... 🤦‍♀️) 1/
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Emily Riederer @emilyriederer.bsky.social · 26/09/2026
There's something really beautiful about canonical mathematical models or analytical frameworks (L-V in diffeq, epi study designs, etc.) Just a testament the extent to which all our x-discipline problems are the same at some level of abstraction and the power of taxonomizing / naming them
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Reposted by Emily Riederer
bpiros.bsky.social @bpiros.bsky.social · 24/09/2026
I made this plot using Matplotlib + plotnine and added interactive tooltips with @joseph-barbier.bsky.social ’s ninejs library. A nice way to bring some interactivity to static visualizations! #matplotlib #ninejs #plotnine #rasterio #ghsl #populationgrid #dataviz
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Emily Riederer @emilyriederer.bsky.social · 25/09/2026
Usually vote by mail but changed things up this year to be in the first ~350k midterm voters!
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Emily Riederer @emilyriederer.bsky.social · 24/09/2026
Never going to look at NYT election data the same was again after hearing @christinezhang.bsky.social ‘s awesome @posit.co ::conf keynote! She discussed all the diff viz they considered to capture the plethora of sources of uncertainty in polling data (Also the needle and election night plots!)
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Emily Riederer @emilyriederer.bsky.social · 21/09/2026
Every year -- this is like the advent calendar of election day to me. Behold both democracy in action and a beautiful feat in data wrangling / harmonization
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Emily Riederer @emilyriederer.bsky.social · 19/09/2026
Incredibly sad and sorry to have missed everyone at posit::conf with a mind bending migraine which apparently was the harbinger of whatever bug has me down and out atm🤒. Grateful to the undeserved kindness of organizers and immense creativity of the lightning speakers who filled the gap 1/
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Emily Riederer @emilyriederer.bsky.social · 14/09/2026
Life advice but also good talk advice. The number of time I get stuck puzzling over, "I want to communicate xyz but what I'm saying isn't coming across" and the answer is "Well, just say xyz" is... a lot
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Emily Riederer @emilyriederer.bsky.social · 14/09/2026
"It's not this it's..." I'm a monster. Make it stop!
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Emily Riederer @emilyriederer.bsky.social · 13/09/2026
Accidentally said “and that difference matters” unironically during talk prep and now I hate myself 🙊 Claudish is coming for us all
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Emily Riederer @emilyriederer.bsky.social · 13/09/2026
Inspired by this blog post, I was testing out how different LLMs perform `polars` tasks Gemini (Colab - I'm cheap what can I say) did NOT just convert to `pandas` to do a quantile instead of using a window function?! pola.rs/posts/llm-po...
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Reposted by Emily Riederer
Simon P. Couch @simonpcouch.com · 11/09/2026
I AM SO EXCITED FOR POSIT CONF
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Reposted by Emily Riederer
Yihui Xie @yihui.org · 21/08/2026
I just came back from summer vacation, and would like to announce a tiny new R package I developed recently: {lt} yihui.org/en/2026/07/l...
yihui.org
The lt Package: Lightweight HTML Tables for R (and Beyond) - Yihui Xie | 谢益辉
Recently I have released a new package on CRAN: lt, short for lightweight tables (or less than). Its origin story is a small moment of shock. About two years ago a project required gt, so I ran &helli...
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Emily Riederer @emilyriederer.bsky.social · 10/09/2026
We could save years of education across data science and data engineering by just printing t-shirts that say "know what makes a row"
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Emily Riederer @emilyriederer.bsky.social · 09/09/2026
tech debt except calendar debt where you keep moving the one-on-ones thinking you'll be less busy tomorrow
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Reposted by Emily Riederer
Demetri @phdemetri.bsky.social · 08/09/2026
Ah yes, the millenial problems. Among them: * Navier Stokes * Home ownership * That damn moustache tattoo on your index finger
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Emily Riederer @emilyriederer.bsky.social · 08/09/2026
Major shout out to @dalefrakes.bsky.social @jounihelske.bsky.social @tiddlydump.bsky.social and @rbly.bsky.social for the help! Bluesky lazyweb is alive and well 🙏
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Emily Riederer @emilyriederer.bsky.social · 07/09/2026
It is surprisingly difficult* to find someone to whom the phrase "data generating process" is first attributed. Stats lazy web? *as in, I Googled it and was not in top hits. I have tried (almost) nothing and it isn't working!
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Emily Riederer @emilyriederer.bsky.social · 04/09/2026
Doing some volunteer data eng work and their infra is... interesting (probably built by a series of random vols over time) 📊 Not pointing fingers, but sharing a running list of antipatterns for your amusement and as I keep track for a future thing I want to write up 🧵
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Emily Riederer @emilyriederer.bsky.social · 03/09/2026
Could not recall this quote. Thanks, Gemini, for "debunking" it for me. Really worried I was going to have to create a universe there...
Google Search: to do you have to invent the world first

Gemini: No, you do not need to invent the world first to create something new
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Emily Riederer @emilyriederer.bsky.social · 03/09/2026
For no real reason, I was looking up something about the ancestry of causal DAGs in path diagrams and came across this picture. I got to see it so you do to. HT to Sewall Wright who both set the course for a very useful analytical tool but also took the time to include cute drawings of guinea pigs
Sketch of Wright's path diagram showing the influence of heredity and environment on the inheritance of color of guinea pigs. Drawing is mostly a directed acyclic graph but includes four cute sideways drawings of guinea pigs.
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Emily Riederer @emilyriederer.bsky.social · 02/09/2026
Just occurred to me I don’t think I’ve ever seen a post I thought to be AI authored on Bluesky. Zero ways to monetize and zero clout from building a following here. Incentives are a magical thing
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Emily Riederer @emilyriederer.bsky.social · 01/09/2026
Appreciation post for the @dataelixir.com newsletter. Just saw it hop into my inbox and always a delight to read
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Emily Riederer @emilyriederer.bsky.social · 30/08/2026
👀👀 @bsky.app beta feature to auto number slide multi-post threads from authors 👀👀 Love this, but would also/additionally love a more Reddit-like ➕ to expand/collapse threads
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Reposted by Emily Riederer
Christian Minich @christianminich.com · 28/08/2026
Short, to the point technical reports are both a flex and a sign of deep respect. “I would have written a shorter letter but I didn’t have the time” has never been more true.
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Emily Riederer @emilyriederer.bsky.social · 28/08/2026
Something I think about a lot is two times in undergrad where a professor said "If you remember absolutely nothing else from this class, remember this"... and I still do. Very effective tool when used sparingly [talk prep thoughts]
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CODE@MIT @codemit.bsky.social · 28/08/2026
Submissions for CODE@MIT are open until Sept 13th. As @dholtz.bsky.social noted www.linkedin.com/feed/update/... we're particularly interested in these topics this year:

 - New metrics and outcomes for changing products and user experiences (e.g., designing outcome measures for conversational, generative, and other complex products; measuring productivity and the quality of product-development and experimentation processes; distinguishing meaningful outcomes from engagement and other intermediate signals; constructing metrics from text and high-dimensional behavioral data; validating AI-generated labels, evaluations, and measures)

 - Using experiments to uncover causal mechanisms (e.g., moving beyond average treatment effects and ship/no-ship decisions to understand why interventions work; using process data (including AI-mediated conversations) to reconstruct heterogeneous user experiences; causal mediation and mechanism discovery; identifying which components of complex or AI-based treatments generate observed effects; using AI tools to analyze previously intractable qualitative and behavioral data)

- Experimental design under rapid iteration and treatment abundance (e.g., designing experiments when AI and other technologies make treatments inexpensive and continuously generated; exploring large, continuous, or combinatorial treatment spaces; allocating scarce traffic across many candidate interventions; integrating offline and synthetic evaluation, factorial designs, bandits, and sequential experiments; determining the diminishing value of additional treatments and iterations)
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Reposted by Emily Riederer
Julia M. Rohrer @dingdingpeng.the100.ci · 27/08/2026
"Statistical analyses serve to answer statistical questions. It is imperative that these questions align closely with the substantive research questions. But quite often, research questions are vague or formulated in several logically distinct ways."
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Reposted by Emily Riederer
Kathryn Anne Edwards @kedseconomist.com · 25/08/2026
I managed to take the Fed to task for bad leadership and discuss W.E.B. Du Bois's "The Philadelphia Negro," a real win of a column. Walking away from public data is going backwards in time, as the history of measuring the economic status of Black people shows. www.bloomberg.com/opinion/arti...
bloomberg.com
The Fed’s Data Task Force Is a Step Backward
The logic seems straightforward enough: To make its decisions, the Federal Reserve needs timely and reliable information. A lot of that is public, but increasingly, there is relevant data in private h...
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Emily Riederer @emilyriederer.bsky.social · 23/08/2026
Anyone teaching undergrads that would indulge me in a boondoggle? Idea is to share a trivial dataset and question but many potential interpretations or "data snags". Asking for <5 min of their time to do whatever seems reasonable; answers tend to cluster around diff made/missed assumptions 1/
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Emily Riederer @emilyriederer.bsky.social · 23/08/2026
Anyone teaching undergrads that would indulge me in a boondoggle? Idea is to share a trivial dataset and question but many potential interpretations or "data snags". Asking for <5 min of their time to do whatever seems reasonable; answers tend to cluster around diff made/missed assumptions 1/
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Emily Riederer @emilyriederer.bsky.social · 22/08/2026
Talking to my mom about Posit keynote prep and past talks Her: "The one of yours I never got was the column names. Surely everyone knows to do that" So, my mom thinks your database is bad and you should feel bad about it. You tell 'em, Mom!
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Emily Riederer @emilyriederer.bsky.social · 22/08/2026
What's the German word for: Sending five people an entirely human-crafted Google doc but being so fatigued of being on the receiving end of Gemini-written docs that you're paranoid they make think any part of it was AI written? Because that was my yesterday
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Libby Heeren @libbyheeren.bsky.social · 19/08/2026
Did you miss Quarto Slidecrafting workshop from @emilhvitfeldt.bsky.social last week? I gotchu. Pinging @emilyriederer.bsky.social who had to miss out! And y'all lemme know if anything is missing in the description! All resources from the chat should be linked there! Video: youtu.be/xpFy0UGeb9Q
youtu.be
Slidecrafting - Creating beautiful slides in Quarto | 2-hr workshop | Emil Hvitfeldt
YouTube video by Posit PBC
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Emily Riederer @emilyriederer.bsky.social · 22/08/2026
Optimist: the cup is half full Pessimist: the cup is half empty Claude: You’re absolutely right to push back on that!
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Emily Riederer @emilyriederer.bsky.social · 21/08/2026
New rule. If you reference it 3x in a week you have to skeet it. fs.blog/chestertons-... Chesterton's Fence is perhaps no where more true than in large pre-existing codebases
fs.blog
Chesterton’s Fence: A Lesson in Thinking
A core component of making great decisions is understanding previous decisions. If we don’t understand how we got “here,” we run the risk of making things much worse.
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Dan McQuillan @danmcquillan.bsky.social · 19/08/2026
Text: Treat your body like a data centre. Consume as much water and literature as possible. Upset local city councils with your existence. 
Background image: a bearded man putting up the frame of aparge tent in a muddy field with trees in the background.
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Emily Riederer @emilyriederer.bsky.social · 16/08/2026
Bought a quite niche* used book and was delighted that it came heavily bookmarked by past reader and felt instant kinship. But oh man do past reader and I have different interests! My dog-ears are in chapters they all but skipped and vice versa *but excellent! I’m rereading to find a cite
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Emily Riederer @emilyriederer.bsky.social · 15/08/2026
Something NOT better? Gemini BigQuery SQL auto-suggestions are just laughably awful. Hallucinating tables that aren't in the schema, columns that aren't in the table, and like, man you're a database you literally know this stuff
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Emily Riederer @emilyriederer.bsky.social · 15/08/2026
I have an inexplicable irresistible desire to build little event-driven systems when orchestration is more appropriate. Building professional things the right way, it's an odd guilty pleasure to spin up short-lived projects recklessly and know I'll deprecate them before the tech debt comes due
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Emily Riederer @emilyriederer.bsky.social · 15/08/2026
There's something fun about checking back in with tools you use intermittently. I tend to have substantial but intermittent use cases for Google Cloud every other year. Neat to see which "papercuts" from last time were pernicious enough for enough folks to have been resolved (multi region queries!)
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Emily Riederer @emilyriederer.bsky.social · 14/08/2026
Last night I tracked down Jenny Bryan’s absolutely lovely 2019 UseR! keynote on Code Smells (worth the watch, btw!) riffing off of Martin Fowler Confronting more AI slop documents this morning, may is suggested we adopt the “Claude smells”?
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Emily Riederer @emilyriederer.bsky.social · 13/08/2026
Amazing 🧵 How do I get a feed of 0% news and 100% people live-debugging causal analyses 🙏
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Mike Boylan-Kolchin @mbkplus.bsky.social · 11/08/2026
This also fundamentally misunderstands how people learn. Having access to very smart people (or machines) might help, but much larger factors are (1) being highly motivated to learn and (2) getting, and being receptive to, constructive criticism.
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Emily Riederer @emilyriederer.bsky.social · 11/08/2026
fortune.com/2026/08/10/i... This is the most Odd Lots story ever that (to the best of my knowledge) has not been on Odd Lots
fortune.com
Italy's $4.7 billion cheese economy is feeling the heat as climate change threatens its cheese banks that hold Parmigiano wheels as loan collateral | Fortune
Extreme heat is straining the vaults that hold Parmigiano wheels as loan collateral, and economists say the damage runs wider than the vault
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Emily Riederer @emilyriederer.bsky.social · 07/08/2026
We've heard the "got a crazy cloud bill because something was misconfigured story". We've heard the "coding agent gone rogue" story. Mark your calendars for the inevitable "coding agent terraforms its way to an insane cloud bill story"
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Emily Riederer @emilyriederer.bsky.social · 03/08/2026
Solved a problem the old school way last night (following a Stack Overflow that linked to another Stack Overflow than linked to a GitHub repo with three stars), and I’m going to be riding that high all week long
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