DB Krupp
@dbkrupp.bsky.social
Working on social evolution theory, kinship, inequality, and competition. Probably not the interdisciplinarian you’re looking for. https://www.saltlab.org
Pinned
DB Krupp
@dbkrupp.bsky.social
· Oct 19
Three Paths Through the Levels of Selection
ecoevorxiv.org
Have you ever wondered about individual-, group-, and multi-level selection arguments? Packed with strong opinions, vehicles and replicators, the Price equation, and causal graphs, I hope you find some answers in my new paper. Please share widely!
ecoevorxiv.org/repository/v...
ecoevorxiv.org/repository/v...
Reposted by DB Krupp
Very happy to share that I just published a new paper from my thesis! 🎉
We analysed 546 species of ant to understand how extreme specialisation into reproductive and non-reproductive roles evolved.
Key discoveries in thread🧵 👇
Full paper here: academic.oup.com/evolut/advan...
We analysed 546 species of ant to understand how extreme specialisation into reproductive and non-reproductive roles evolved.
Key discoveries in thread🧵 👇
Full paper here: academic.oup.com/evolut/advan...
December 18, 2025 at 3:31 PM
Very happy to share that I just published a new paper from my thesis! 🎉
We analysed 546 species of ant to understand how extreme specialisation into reproductive and non-reproductive roles evolved.
Key discoveries in thread🧵 👇
Full paper here: academic.oup.com/evolut/advan...
We analysed 546 species of ant to understand how extreme specialisation into reproductive and non-reproductive roles evolved.
Key discoveries in thread🧵 👇
Full paper here: academic.oup.com/evolut/advan...
Reposted by DB Krupp
They’re not perfect, but golly, public universities are one of the best engines of economic mobility we have
Recently accepted by #QJE, “Marginal Returns to Public Universities,” by Jack Mountjoy: doi.org/10.1093/qje/...
Marginal Returns to Public Universities
Abstract. This paper studies the returns to enrolling in American public universities by comparing the long-term outcomes of barely admitted versus barely
doi.org
December 25, 2025 at 12:15 AM
They’re not perfect, but golly, public universities are one of the best engines of economic mobility we have
Reposted by DB Krupp
Hoverboards are the future, segways are the future, betamax, laser disc, Google glass is the future, 3d tvs are the future, curved screens are the future.
Like do we have to traipse through the whole graveyard of tech to get these people to understand just becauae you say it doesn't make it true.
Like do we have to traipse through the whole graveyard of tech to get these people to understand just becauae you say it doesn't make it true.
December 24, 2025 at 1:57 AM
Hoverboards are the future, segways are the future, betamax, laser disc, Google glass is the future, 3d tvs are the future, curved screens are the future.
Like do we have to traipse through the whole graveyard of tech to get these people to understand just becauae you say it doesn't make it true.
Like do we have to traipse through the whole graveyard of tech to get these people to understand just becauae you say it doesn't make it true.
Reposted by DB Krupp
These declines are MASSIVE.
And the comparative silence in media coverage is absolutely DAMNING.
“Why are ppl always so afraid of crime?”
THIS is why. When crime goes up, media trips over itself to report it.
Falls to pre-war (!!) levels? Just CRICKETS.
And the comparative silence in media coverage is absolutely DAMNING.
“Why are ppl always so afraid of crime?”
THIS is why. When crime goes up, media trips over itself to report it.
Falls to pre-war (!!) levels? Just CRICKETS.
I count 10 cities in 2025 that are on track to have the fewest murders since at least 1970. Newark is on pace to have the fewest murders since 1956 (though only have data through Oct this year) and San Francisco is on pace to have the fewest murders since 1942.
December 23, 2025 at 10:03 PM
These declines are MASSIVE.
And the comparative silence in media coverage is absolutely DAMNING.
“Why are ppl always so afraid of crime?”
THIS is why. When crime goes up, media trips over itself to report it.
Falls to pre-war (!!) levels? Just CRICKETS.
And the comparative silence in media coverage is absolutely DAMNING.
“Why are ppl always so afraid of crime?”
THIS is why. When crime goes up, media trips over itself to report it.
Falls to pre-war (!!) levels? Just CRICKETS.
Reposted by DB Krupp
The full spiked 60 Minutes CECOT package, clean & subtitled. 1/5
December 23, 2025 at 1:28 AM
The full spiked 60 Minutes CECOT package, clean & subtitled. 1/5
Reposted by DB Krupp
CBS didn't run the 60 Minutes segment on CECOT, but over here at @propublica.org we've been working on the story since March, including finding out who each and every man sent to that maximum security prison was.
You can see our reporting here: www.propublica.org/series/depor...
You can see our reporting here: www.propublica.org/series/depor...
Deported and Imprisoned Archives
A case-by-case investigation that examines the Trump administration’s claims that these immigrants are all “sick criminals” and “terrorists” and that shows what they suffered during months in one of t...
www.propublica.org
December 22, 2025 at 4:08 PM
CBS didn't run the 60 Minutes segment on CECOT, but over here at @propublica.org we've been working on the story since March, including finding out who each and every man sent to that maximum security prison was.
You can see our reporting here: www.propublica.org/series/depor...
You can see our reporting here: www.propublica.org/series/depor...
Reposted by DB Krupp
Do people judge what is going to happen in unknown situations differently depending on their socioeconomic position? Yes, if you experience lower socioeconomic position, you think the big rewards are even more unlikely to come your way: www.sciencedirect.com/science/arti...
Low socioeconomic status amplifies the perceived rarity of large rewards
Decision-making relies on heuristics derived from past experiences that likely vary with socioeconomic status. We investigate socioeconomic difference…
www.sciencedirect.com
December 22, 2025 at 9:49 AM
Do people judge what is going to happen in unknown situations differently depending on their socioeconomic position? Yes, if you experience lower socioeconomic position, you think the big rewards are even more unlikely to come your way: www.sciencedirect.com/science/arti...
Reposted by DB Krupp
I am taking the opportunity to once again remind you of the time Naomi Wolf thought Apple invented time machines run by vaccines
December 19, 2025 at 2:18 PM
I am taking the opportunity to once again remind you of the time Naomi Wolf thought Apple invented time machines run by vaccines
Reposted by DB Krupp
The Paradox of the Organism: Adaptation and Internal Conflict is now out!
Get your copy directly from @harvardpress.bsky.social
Get your copy directly from @harvardpress.bsky.social
December 17, 2025 at 4:34 PM
The Paradox of the Organism: Adaptation and Internal Conflict is now out!
Get your copy directly from @harvardpress.bsky.social
Get your copy directly from @harvardpress.bsky.social
Really exciting work! (Link to paper is downthread.)
In our new study we were the first to experimentally simulate the origin of sociality! By controlling how many wasp 🐝daughters could help their mom, we found that early helpers don't just add to colony success—they multiply it!
December 17, 2025 at 1:04 PM
Really exciting work! (Link to paper is downthread.)
Reposted by DB Krupp
@kztwyman.bsky.social & @andygardner.bsky.social mathematically connect the dynamics of natural selection to optimisation to provide formal justification for viewing obligately eusocial colonies as adaptive individuals in their own right—that is, superorganism:
doi.org/10.1093/jeb/...
doi.org/10.1093/jeb/...
December 16, 2025 at 12:43 PM
@kztwyman.bsky.social & @andygardner.bsky.social mathematically connect the dynamics of natural selection to optimisation to provide formal justification for viewing obligately eusocial colonies as adaptive individuals in their own right—that is, superorganism:
doi.org/10.1093/jeb/...
doi.org/10.1093/jeb/...
Reposted by DB Krupp
NEW: One of the most significant accomplishments of the Trump Admin: Decimating the US's humanitarian aid.
We went to S. Sudan to see the effects.
Rubio says no one has died from the cuts.
Spoiler: That's not true.
@annamaria.bsky.social & Brett Murphy:
www.propublica.org/article/usai...
We went to S. Sudan to see the effects.
Rubio says no one has died from the cuts.
Spoiler: That's not true.
@annamaria.bsky.social & Brett Murphy:
www.propublica.org/article/usai...
Trump Officials Celebrated With Cake After Slashing Aid. Then People Died of Cholera.
Behind closed doors in Washington, top advisers made a series of decisions that had devastating repercussions for the poorest country on earth. We went to South Sudan and found people who died as a re...
www.propublica.org
December 15, 2025 at 12:10 PM
NEW: One of the most significant accomplishments of the Trump Admin: Decimating the US's humanitarian aid.
We went to S. Sudan to see the effects.
Rubio says no one has died from the cuts.
Spoiler: That's not true.
@annamaria.bsky.social & Brett Murphy:
www.propublica.org/article/usai...
We went to S. Sudan to see the effects.
Rubio says no one has died from the cuts.
Spoiler: That's not true.
@annamaria.bsky.social & Brett Murphy:
www.propublica.org/article/usai...
Reposted by DB Krupp
please take a moment to appreciate Tesla's epic accomplishment of coming dead last in the auto industry in reliability, despite making relatively expensive cars with a tiny fraction of the moving parts
www.consumerreports.org/cars/which-b...
www.consumerreports.org/cars/which-b...
December 15, 2025 at 3:53 PM
please take a moment to appreciate Tesla's epic accomplishment of coming dead last in the auto industry in reliability, despite making relatively expensive cars with a tiny fraction of the moving parts
www.consumerreports.org/cars/which-b...
www.consumerreports.org/cars/which-b...
Reposted by DB Krupp
No question, this is the most original paper I have ever written
It says that something that seems plain and obvious - humans have an intuitive sense of what is and is not grammatical - and describes how this apparent common sense is actually misleading
Thread coming soon!
It says that something that seems plain and obvious - humans have an intuitive sense of what is and is not grammatical - and describes how this apparent common sense is actually misleading
Thread coming soon!
Why does “The rat the cat the dog chased killed ate the malt” feel wrong even though it is grammatical? Thom Scott Phillips links gut judgements to communicative usefulness, not abstract rules
doi.org/10.25189/267...
#langsky #linguistics
doi.org/10.25189/267...
#langsky #linguistics
December 12, 2025 at 1:27 PM
No question, this is the most original paper I have ever written
It says that something that seems plain and obvious - humans have an intuitive sense of what is and is not grammatical - and describes how this apparent common sense is actually misleading
Thread coming soon!
It says that something that seems plain and obvious - humans have an intuitive sense of what is and is not grammatical - and describes how this apparent common sense is actually misleading
Thread coming soon!
Reposted by DB Krupp
Um, ok...
This paper forthcoming at the JOP provides evidence that rent control in Germany actually made tenants MASSIVELY *less* NIMBY.
This result was in the opposite direction of the authors' pre-registered expectations.
And the effect sizes are, truly, massive.
This paper forthcoming at the JOP provides evidence that rent control in Germany actually made tenants MASSIVELY *less* NIMBY.
This result was in the opposite direction of the authors' pre-registered expectations.
And the effect sizes are, truly, massive.
December 11, 2025 at 4:30 PM
Um, ok...
This paper forthcoming at the JOP provides evidence that rent control in Germany actually made tenants MASSIVELY *less* NIMBY.
This result was in the opposite direction of the authors' pre-registered expectations.
And the effect sizes are, truly, massive.
This paper forthcoming at the JOP provides evidence that rent control in Germany actually made tenants MASSIVELY *less* NIMBY.
This result was in the opposite direction of the authors' pre-registered expectations.
And the effect sizes are, truly, massive.
Reposted by DB Krupp
Increase tri-council funding next you cowards
It's happening! Canada launched two programs to recruit international researchers.
Canada Impact+ Research Chairs (1 million/yr for 8 yrs +)
Canada Impact+ Emerging Leaders.
I will do my best to facilitate the process for those interested. Hit me up.
www.canada.ca/en/impact-pl...
Canada Impact+ Research Chairs (1 million/yr for 8 yrs +)
Canada Impact+ Emerging Leaders.
I will do my best to facilitate the process for those interested. Hit me up.
www.canada.ca/en/impact-pl...
The Government of Canada introduces new programs for international researchers - Canada.ca
www.canada.ca
December 9, 2025 at 8:26 PM
Increase tri-council funding next you cowards
Two birds loved
in a flurry of red feathers
like a burst cottonball,
continuing while I drove over them.
I am a good driver, nothing shocks me.
(Michael Ondaatje, “Application for a Driving License”)
in a flurry of red feathers
like a burst cottonball,
continuing while I drove over them.
I am a good driver, nothing shocks me.
(Michael Ondaatje, “Application for a Driving License”)
Which lines of poetry live rent-free in your head?
December 7, 2025 at 2:42 PM
Two birds loved
in a flurry of red feathers
like a burst cottonball,
continuing while I drove over them.
I am a good driver, nothing shocks me.
(Michael Ondaatje, “Application for a Driving License”)
in a flurry of red feathers
like a burst cottonball,
continuing while I drove over them.
I am a good driver, nothing shocks me.
(Michael Ondaatje, “Application for a Driving License”)
Reposted by DB Krupp
Trans people suffer the most violence in prison. PREA was never enough but it’s just disgusting to roll it back.
BREAKING: Trump administration plans to end prison rape protections for trans & intersex people, memo says. A DOJ memo says certain standards under the Prison Rape Elimination Act (PREA) do not align with Trump’s Jan. 20 anti-trans executive order, @byadamrhodes.bsky.social reports.
Trump administration plans to end prison rape protections for trans and intersex people
A Department of Justice memo says certain standards under the Prison Rape Elimination Act do not align with Trump’s executive order
prismreports.org
December 5, 2025 at 12:28 AM
Trans people suffer the most violence in prison. PREA was never enough but it’s just disgusting to roll it back.
Reposted by DB Krupp
The Twitter account for the Turning Point USA chapter at OU seems to have only started posting last week with an anti-trans pressure campaign. And then, oh gosh, what are the odds that they just happened to immediately find someone who claims to have been discriminated against by a trans person?
December 1, 2025 at 10:14 PM
The Twitter account for the Turning Point USA chapter at OU seems to have only started posting last week with an anti-trans pressure campaign. And then, oh gosh, what are the odds that they just happened to immediately find someone who claims to have been discriminated against by a trans person?
Reposted by DB Krupp
I am frustrated and enraged at the UCP and Danielle Smith, for using the most powerful constitutional hammer we have to vaporize human rights for children and their parents.
I am disgusted by these Conservative MLAs. Every single one of them has taken leave of their senses and their humanity.
I am disgusted by these Conservative MLAs. Every single one of them has taken leave of their senses and their humanity.
Today, Alberta introduced Bill 9 and invoked the notwithstanding clause to shield three anti-trans laws from constitutional challenge. These laws deny gender-affirming care to youth, erase 2SLGBTQI identities from schools, and ban trans girls and women from sports.
November 18, 2025 at 10:18 PM
I am frustrated and enraged at the UCP and Danielle Smith, for using the most powerful constitutional hammer we have to vaporize human rights for children and their parents.
I am disgusted by these Conservative MLAs. Every single one of them has taken leave of their senses and their humanity.
I am disgusted by these Conservative MLAs. Every single one of them has taken leave of their senses and their humanity.
Reposted by DB Krupp
New paper: "A formal theory of group-level adaptation for obligate eusociality", with Kalyani Twyman (@kztwyman.bsky.social) #OpenAccess
academic.oup.com/jeb/advance-...
#Image #GoogleGemini @jevbio.bsky.social #OA
academic.oup.com/jeb/advance-...
#Image #GoogleGemini @jevbio.bsky.social #OA
November 18, 2025 at 10:35 AM
New paper: "A formal theory of group-level adaptation for obligate eusociality", with Kalyani Twyman (@kztwyman.bsky.social) #OpenAccess
academic.oup.com/jeb/advance-...
#Image #GoogleGemini @jevbio.bsky.social #OA
academic.oup.com/jeb/advance-...
#Image #GoogleGemini @jevbio.bsky.social #OA
This is THE story of US poverty: that scores of people do everything Republicans say they want them to do—hold a steady job, be married, etc—and still be poor. I recommend this paper to anyone willing to understand this: www.science.org/doi/10.1126/...
November 17, 2025 at 4:47 PM
This is THE story of US poverty: that scores of people do everything Republicans say they want them to do—hold a steady job, be married, etc—and still be poor. I recommend this paper to anyone willing to understand this: www.science.org/doi/10.1126/...
Reposted by DB Krupp
Coding Club: Creating an R Package by Lisa DeBruine
#RStats
https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package
#RStats
https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package
November 15, 2025 at 4:25 PM
Coding Club: Creating an R Package by Lisa DeBruine
#RStats
https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package
#RStats
https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package
Reposted by DB Krupp
“Housing shortage – Jews to blame," letter sticker, German Reich, 1938
zwangsraeume.berlin/en/context
zwangsraeume.berlin/en/context
November 14, 2025 at 2:16 AM
“Housing shortage – Jews to blame," letter sticker, German Reich, 1938
zwangsraeume.berlin/en/context
zwangsraeume.berlin/en/context
Reposted by DB Krupp
For my Xtra column this month, I wrote about what it's been like living as a trans person in Trump's first year and the outlook moving forward. xtramagazine.com/power/politi...
A year after Trump's reelection, what's next for trans people? | Xtra Magazine
The past year has been horrifying for trans people in the U.S. The past week gave me hope for the future
xtramagazine.com
November 11, 2025 at 7:51 PM
For my Xtra column this month, I wrote about what it's been like living as a trans person in Trump's first year and the outlook moving forward. xtramagazine.com/power/politi...