Reposted from the original at https://blog.stephenturner.us/p/openai-codex-app-qqman.Earlier this week I reposted a Bluesky post from Ethan Mollick.
I’m on the same page here — there are problems for sure, but these
tools have irreversibly changed th...
Short practical advise on media targeting decisions:
Calculate the “Break-Even Multiplier” Before Spending
Instead of asking if a targeting segment will perform better than a broad audience, calculate exactly how much better it needs to be to ... [Read more...]
At rOpenSci we’re continually grateful for the support and engagement of our community who help make our open-source ecosystem stronger, more inclusive, and more collaborative. The software peer review program is one of the best examples of this: brin... [Read more...]
In December, one hundred ninety-six new packages made it to CRAN. Here are my Top 40 picks in nineteen categories: Agriculture, Artificial Intelligence, Audio Analysis, Causal Inference, Computational Methods, Ecology, Econometrics, Epidemiology...
A good sports betting system is not a “pick-winners” machine. It’s an uncertainty engine: it turns data into probabilities, probabilities into expected value, and expected value into position sizes that survive variance. If you can do those three steps consistently, you can build a robust process— even if individual ... [Read more...]
Today’s paper is Byron Sharp’s 1997 “Loyalty Programs and their Impact on Repeat-Purchase Loyalty Patterns” – a classic that remains surprisingly relevant.
Takeaways for marketing practitioners?
Loyalty programs don’t create “excess loyalty”:... [Read more...]
I am very happy to announce the release of dfms version 1.0 (and 0.4.0 just a week earlier, see news), implementing major features such as support for dynamic factor models (DFMs) with autoregressive errors, mixed-frequency (monthly-quarterly) DFMs, including with autoregressive errors, and decomposition of forecast revisions into news releases (updates to time ...
Dear rOpenSci friends, it’s time for our monthly news roundup! You can read this post on our blog. Now let’s dive into the activity at and around rOpenSci!
rOpenSci HQ
Open call for the rOpenSci Champions Program 2026!
We are pleased t... [Read more...]
There was a very long time without a blog post from me.
I will start now again with a very short blog post with some book and blog recommendations.
I think two still very hot topics currently are AI and Causal Modelling.
AI
For a theoretical A... [Read more...]
Read it in: Español. Maintaining an open source package is rewarding work, but it’s also a lot of work.
Life and careers change, interests shift, and sometimes you simply don’t have the time or energy to keep working on your R package (and that’s okay!1).
When ... [Read more...]
Guest post by Christian Martinez, developer of the nycOpenData package in R.
nycOpenData: A unified R interface to NYC Open Data APIs
I am pleased to announce the release of nycOpenData, an R package providing convenient, tidy access to dozens of ...
I saw a fun video on YouTube recently in which some runners attempted to do two parkruns in one day. I don’t mean run the same parkrun course twice, I mean they ran one parkrun at one course and then drove to a different course and ran that one ...
Do prices feel like they are rising more than the CPI (Consumer Price Index) says? Yes.
For 2025 the overall CPI increased by a pretty moderate 2.7% (CPI-U for all urban cons...
Thanks to Athanasia Mo Mowinckel for reviewing this post!
One goal of mine this year is to learn how to crochet amigurumi, that is to say, cute creatures.
When working on my first project, a cat toy made out of yarn left-over from knitting projects, I ... [Read more...]
This document describes the addition of support for variable fonts in R, when rendering glyphs, plus changes to the CRAN package xdvir to take advantage of that ...
Boxing analysis is no longer just about punch totals or “who looked busier.” Modern fight analysis is data science: repeatable pipelines, validated data, explainable models, and performance indicators that translate into strategy. This post shows how to build a professional fight data science workflow in R—from raw data to ... [Read more...]
Preamble: I had a roughly 8 year break from blogging and focussed on kids plus related duties. This year, I will try to start again.
My goal is to write about (advertising-related) research and how practitioners can apply the insights.
Todays paper i... [Read more...]
We are pleased to announce the release of {pharmaversesdtm} 1.4.0 🎉
This release expands the breadth of SDTM test data available in the package, with a particular focus on neurology and oncology, alongside several targeted enhancements and fi...
Alt Text
First things first, if you haven’t heard of or used alt text before, it
is a brief written description of an image that explains context and
purpose. It is used to improve accessibility by allowing screen readers
to describe images, or p...
I am incredibly excited to announce the release of the futurize package. This launch marks a major milestone in the decade-long journey of the Futureverse project.
Since the inception of the future ecosystem, I (and others) have envisioned a tool ...