Lightnews — Scholar-powered news

Kyle Butts @kylefbutts.bsky.social · 8d

TIL you can calculate the mean and the variance in one pass through a vector 🤯

Really nice article showing how:
nullbuffer.com/articles/wel...

Numerically stable algorithm for computing the running mean

nullbuffer.com

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Kyle Butts @kylefbutts.bsky.social · 15d

If you have any questions about the U of A, please reach out! Happy to answer any questions :-)

Kyle Butts @kylefbutts.bsky.social · 15d

And finally, the department! Our group is a very young and research focused. We have a great group of development/urban/labor folks with a mix of reduced form and structural approaches; A really strong experimental group; and a few applied econometricians who are happy to help!!

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Kyle Butts @kylefbutts.bsky.social · 15d

Concerned about the southern heat? Being within the Ozarks, makes the summer not too bad. Plus the winter is very temperate..

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Kyle Butts @kylefbutts.bsky.social · 15d

If sports are your thing, there's no place better than the SEC

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Kyle Butts @kylefbutts.bsky.social · 15d

Walmart, JB Hunt, Tyson Chicken are all headquartered here. Many large companies have campuses here as well.

This younger demographic brings a lot of consumptive amenities, like great food! Dinner with speakers is a nice treat..

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Kyle Butts @kylefbutts.bsky.social · 15d

The arts scene is magnificent:

- Walton Arts Center brings in Broadway shows all year
- Crystal Bridges is a world class art musuem
- The AMP has great live music

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Kyle Butts @kylefbutts.bsky.social · 15d

We are in the beautiful Ozark mountains with tons of hikes and incredible mountain biking opportunities.

The Razorback greenway makes biking to and from campus very easy and there's a few breweries along the way..

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Kyle Butts @kylefbutts.bsky.social · 15d

Come be a razorback! We are hiring two positions this year at the U of Arkansas!

Macro/General Equilibrium: www.aeaweb.org/joe/listing....
Applied Micro: www.aeaweb.org/joe/listing....

Northwest Arkansas is consistently ranked one of the best places to live. Here's some highlights!

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Kyle Butts @kylefbutts.bsky.social · 15d

yup! wrote this after refereeing yet another paper randomizing policy rollout in DID...

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Kyle Butts @kylefbutts.bsky.social · Jun 10

I have a script that should pop up after installing the extension and opening a do file. Does it not do that?

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Kyle Butts @kylefbutts.bsky.social · Jun 9

Does anyone have really good examples of a github repository for a research paper. Trying to get good examples for a lesson I'm giving

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Kyle Butts @kylefbutts.bsky.social · Jun 8

github.com/kylebutts/vs...
If you are using vscode and stata, you should try out my extension. It uses interactive window which let's you write in a `.do` file but get a notebook type experience.

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Kyle Butts @kylefbutts.bsky.social · Apr 28

The answer is all 0s !!! what a frustrating choice !!!!

Kyle Butts @kylefbutts.bsky.social · Apr 23

Stata quiz. what do you think the output of `tab` will be?

```
sysuse auto, replace
reg mpg i.rep78 if rep78 == 2, nocons
predict xb
tab xb if rep78 != 2
```

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Kyle Butts @kylefbutts.bsky.social · Apr 23

one would hope!

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Kyle Butts @kylefbutts.bsky.social · Apr 23

Stata quiz. what do you think the output of `tab` will be?

```
sysuse auto, replace
reg mpg i.rep78 if rep78 == 2, nocons
predict xb
tab xb if rep78 != 2
```

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Kyle Butts @kylefbutts.bsky.social · Apr 19

kylebutts.com/blog/2025-04...

A short blog post for efficient stats coding. All about the importance of dimensionality when doing matrix operations ft. 100x speed-up of my code

Kyle Butts

Kyle Butts -- Urban Economics and Applied Econometrics

kylebutts.com

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Kyle Butts @kylefbutts.bsky.social · Apr 5

TIL how to download census data (www2.census.gov) super simply.

Finder: Go > Connect to Server > ftp://ftp2.census.gov/. Login as guest and 🤯

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Kyle Butts @kylefbutts.bsky.social · Mar 25

great little explanation on why to avoid passive voice refactoringenglish.com/chapters/pas...

Passive Voice Considered Harmful

Effective writing for software developers

refactoringenglish.com

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Kyle Butts @kylefbutts.bsky.social · Mar 11

R tip: If you run code but forget to save it in a variable, you can use `.Last.value` in the console.

More, if you want to copy the result to your clipboard, use `clipr::write_last_clip`:

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Reposted by Kyle Butts

Achim Zeileis @zeileis.org · Feb 24

🚨 The "penguins" data is coming to the base #rstats{datasets} in 4.5.0!

@ellakaye.co.uk & @HeathrTurnr.fosstodon.org.ap.brid.gy r prepared an adapted and a raw version of the data set based on the {palmerpenguins} 📦 by @allisonhorst.bsky.social @apreshill.com and Kristen Gorman.

📈 Scatter plot:

Scatter plot of bill depth vs. length by species (color) and sex (symbol). It shows positive correlations for all species with males tending to have bigger bills than females.

sym <- c(1, 16)
pal <- c("darkorange","purple","cyan4")
plot(bill_dep ~ bill_len, data = penguins, pch = sym[sex], col = pal[species])

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Kyle Butts @kylefbutts.bsky.social · Feb 20

WHAT YOU THOUGHT I ONLY HAVE 1 CUTE DOG ?? THINK AGAIN

Kyle Butts @kylefbutts.bsky.social · Feb 20

Probably doesn’t matter much for this map, but I like st_point_on_surface() because centroids could be not within the shape for weird shaped counties

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Kyle Butts @kylefbutts.bsky.social · Feb 20

snow day in Fayetteville

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Kyle Butts @kylefbutts.bsky.social · Feb 18

👀 github.com/posit-dev/po...

Positron Assistant by georgestagg · Pull Request #6361 · posit-dev/positron

Initial Positron Assistant scaffolding. FAO @jmcphers.

github.com

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