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Robert Chung

@rchung.bsky.social

Anti-social social scientist with low amusement threshold. When you do theoretical mathematical demography it's good to have a Plan B so I ride a bike.

414 Followers  |  195 Following  |  730 Posts  |  Joined: 03.08.2023
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Posts by Robert Chung (@rchung.bsky.social)

(Though I made exactly that same comment about cycling analytics back before any of the current big apps existed: they were diving into a single ride's data when the big potential was looking at trends, patterns, and deviations from pattern across rides).

04.03.2026 11:25 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

(That's not about GC, it's about the world of cycling apps).

04.03.2026 11:22 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I sort of gave up on that, and export to R when I want to dive deep. I think, in general, too much effort is made on diving deeply into a single ride and not quite enough on looking at trends and patterns across rides.

04.03.2026 11:22 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

The probability of being found out is more of a deterrent than severity of punishment. This has implications for monitoring of potential bad behavior vs. coming down hard post-discovery. It's also related to "it's not the crime, it's the coverup."

04.03.2026 11:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Default GC can be a little intimidating, especially for newer users--but occasionally even for me. I just had a conversation with my dentist about all his (hand) tools. 90% of the time he grabs the same 3 tools. I've paid him enough to outfit his entire damn office and he uses 3 hand tools.

04.03.2026 10:25 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Hmmm. That's ... intriguing. Nice demo.

04.03.2026 09:29 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
GoldenCheetah Web Viewer by SweatStack

Imagine community-built dashboards, custom visualizations, training plan tools. All running in the browser, all powered by your local GoldenCheetah data. Here's the proof of concept: goldencheetah-web-viewer.pages.sweatstack.dev

04.03.2026 09:04 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0

Getting the US into avoidable disaster in Iraq took months and months and months.

In Vietnam, it took years and years and years.

We are just three days into this totally unnecessary, one-man's-whim fiasco.

03.03.2026 01:37 β€” πŸ‘ 608    πŸ” 105    πŸ’¬ 23    πŸ“Œ 1

Heads up US demographers. Our main NIH study sections (SSPA/SSPB) are being disbanded. I don’t know what this means. public.csr.nih.gov/StudySection...

03.03.2026 02:53 β€” πŸ‘ 22    πŸ” 17    πŸ’¬ 4    πŸ“Œ 0

No one could have foreseen.

02.03.2026 14:30 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

But to be fair, often I'm looking for things that stick out from the trend, not always the trend itself. Anyway, a change in slope is something that sticks out from a trend.

01.03.2026 15:15 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I often avoid parametric detrends at first; sometimes they work after I'm familiar with the reasons and sources of noise. When looking for a small change in something it's good to use techniques that don't enforce fit.

01.03.2026 15:09 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Trying to spot changes in the slope of a noisy trend can be hard. Sometimes it helps to remove the trend.

01.03.2026 05:56 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Salaire?

28.02.2026 20:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
The Birthrate Is Plunging. Why Some Say That’s a Good Thing.

Wise words from *Dr* Guzzo:
β€œWe spent decades shaming women for having kids under the wrong circumstances, for not having their ducks in a row,” said Ms. Guzzo, the demographer. β€œNow they are holding up their end of the bargain.”
www.nytimes.com/2026/02/27/u... @karenguzzo.bsky.social #demography

27.02.2026 20:54 β€” πŸ‘ 47    πŸ” 12    πŸ’¬ 1    πŸ“Œ 2

I was going to write, "FIFA wants its Peace Prize back," but actually FIFA doesn't really care.

28.02.2026 17:16 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The birthright citizenship IS an easy case. That’s the point. That’s the flex. β€œNo matter what rights you think you have, no matter how universally acknowledged you think they are, no matter how central to American values those rights are, WE decide whether or not you have those rights”……
/1

27.02.2026 15:28 β€” πŸ‘ 2901    πŸ” 721    πŸ’¬ 50    πŸ“Œ 52

The Washington Post's description of the bodycam video of his arrest last year, and the translation of Mr. Shah Alam's comments, is gutting. Remember, he was entirely blind in one eye and could only see three feet in the other, and he spoke virtually no English.

He spent a year in jail for this.

27.02.2026 01:01 β€” πŸ‘ 3963    πŸ” 1778    πŸ’¬ 72    πŸ“Œ 115
Preview
Breaking: Trans inmate's lawyers claim "egregious retaliation" in violation of court order Trans woman involved in a lawsuit challenging anti-trans policies says federal prison official told her on Feb. 22: β€œI don’t give a fuck what that judge says, I do what I want.”

β€œI don’t give a fuck what that judge says, I do what I want.”

The judge in question: Judge Royce Lamberth.

Let's see how this goes.

www.lawdork.com/p/trans-inma...

26.02.2026 05:53 β€” πŸ‘ 926    πŸ” 256    πŸ’¬ 18    πŸ“Œ 37

They beat a blind refugee who speaks no English for failing to obey police commands he could not understand. Then instead of apologizing, they charged him with possession of a β€œweapon”—HIS WALKING STICK. Then they dumped him miles from home without notifying anyone, after which he was found dead.

25.02.2026 20:48 β€” πŸ‘ 12646    πŸ” 6100    πŸ’¬ 56    πŸ“Œ 332

But ... he's been so very very transparent. The most transparent.

24.02.2026 22:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Post image

In our new paper (BMJ Global Health), we systematically collected 923 historical growth studies covering 122 countries from 1814–2016.

By harmonising height-by-age data, we reconstruct stunting patterns over two centuries.

Link: doi.org/10.1136/bmjg...

5)

23.02.2026 18:18 β€” πŸ‘ 21    πŸ” 10    πŸ’¬ 2    πŸ“Œ 1
Post image Post image

Pretty amazing that comms person at FBI called my @ms.now colleague @kendilanian-nbc.bsky.social a liar and demand a correction only for Kash to post a photo from the locker room

22.02.2026 21:48 β€” πŸ‘ 21143    πŸ” 5931    πŸ’¬ 595    πŸ“Œ 293

Ten thousand days is a bit more than 27 years. On 6 Oct 1998 Magali realized that our lives would be bound together. These have been the best 10,000 days of my life.

21.02.2026 16:39 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Well, I guess that's a lot of refunds going to China!

20.02.2026 18:02 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio

New Post-Doc Opportunity:

Princeton OPR is hiring postdocs in population studies.

PhD in demography or related fields (sociology, economics, epi, etc.) welcome.

Apply here: apply.interfolio.com/181246

Review begins 3/1/16. Please share!

18.02.2026 15:37 β€” πŸ‘ 10    πŸ” 8    πŸ’¬ 0    πŸ“Œ 0

Holy fuck.

18.02.2026 23:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
postdoctoral associate at Princeton ad

postdoctoral associate at Princeton ad

New Postdoctoral Research Associate positions at @Princeton's Office of Population Research!

17.02.2026 18:08 β€” πŸ‘ 22    πŸ” 28    πŸ’¬ 1    πŸ“Œ 0

Noem more concerned about her blankie than for the love of Americans.

18.02.2026 00:56 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Application deadline: March 1

18.02.2026 00:55 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0