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Hannes Ullrich
@hannesullrich.com
5.6K followers 1.3K following 300 posts
Economist at DIW Berlin, University of Copenhagen, and Berlin School of Economics

Research on Digitilization, Health Care, and Industrial Organization

https://www.hannesullrich.com
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Hannes Ullrich @hannesullrich.com · Nov 22
Now published in the December issue of Quantitative Marketing and Economics: link.springer.com/article/10.1...

#QME has a very efficient, no BS editorial policy. Can highly recommend!
Reposted by Hannes Ullrich
davidzipper.bsky.social
New NBER research finds that in NYC alone, Uber and Lyft collect $300M annually by making it hard to comparison shop before booking a ride.

www.nber.org/papers/w34441
November 10, 2025 at 2:11 PM
Reposted by Hannes Ullrich
georgweizsaecker.bsky.social
🚨Very Strong Job Market Candidates

#EconSky

The Berlin School of Economics is a unique cooperation of 9 institutions - together we do research and train PhDs/Postdocs.

This year: fantastic people in applied micro, behavioral/experimental, and macro. 👇🏻

berlinschoolofeconomics.de/job-market/j...
Job Market Candidates
berlinschoolofeconomics.de
November 10, 2025 at 6:47 AM
Reposted by Hannes Ullrich
lavaredmonds.bsky.social
On net I like Bluesky, but the shift really lost grad students (far fewer active here vs. during peak EconTwitter). With job market season, it’s been kinda nice seeing familiar faces who were in the Covid grad school trenches w me popping up again recently

Like hey there! I remember you! Cool paper
Leonardo DiCaprio pointing in a couch meme
November 8, 2025 at 2:20 AM
Reposted by Hannes Ullrich
j2bryson.bsky.social
“One of the first public displays of the double helix, at the Royal Society Conversazione in June 1953, was signed by the authors of all three Nature papers1–3,21. In this, the discovery of the structure of DNA was not seen as a race won by Watson and Crick, but as the outcome of a joint effort.”
According to journalist Horace Freeland Judson and Franklin’s biographer, Brenda Maddox, Rosalind Franklin has been reduced to the “wronged heroine” of the double helix22,23. She deserves to be remembered not as the victim of the double helix, but as an equal contributor to the solution of the structure.
November 8, 2025 at 2:08 PM
Reposted by Hannes Ullrich
joshgans.bsky.social
Folks, this is a hot deal. Try out refine.ink and you (and I) get a free review if you use the referral code refine.ink?ref=am9zaHVh... I'm telling you, it is worth it. You'll save at minimum one round of journal submissions.
refine
AI feedback for research.
www.refine.ink
November 4, 2025 at 1:58 PM
Reposted by Hannes Ullrich
jmwiarda.bsky.social
Ohne Reallabore läuft die KI an Hochschule ins Leere
Nicht Technik entscheidet über den Lernerfolg, sondern die Art, wie sie erforscht, erprobt und verantwortungsvoll eingeführt wird. Ein Gastbeitrag von Marcus Specht und Stefan Stürmer im Wiarda-Blog: www.jmwiarda.de/blog/2025/11...
November 6, 2025 at 10:10 AM
Reposted by Hannes Ullrich
uedio.bsky.social
Die SZ sagt, was ist.
Die EU hat am Morgen ihr Klimaziel verwässert und ihre Klimaschutzarchitektur geschwächt
www.sueddeutsche.de/politik/eu-k...
EU schwächt ihre Klimaziele ab
Die Umweltminister der EU-Mitgliedstaaten billigten am Mittwoch in Brüssel einen in der Nacht erzielten Kompromiss.
www.sueddeutsche.de
November 5, 2025 at 8:49 AM
Reposted by Hannes Ullrich
diw.de
Der @erc.europa.eu fördert Projekte, die besondere Innovationen versprechen. Die DIW-Forscher @hannesullrich.com und @pmlersch.bsky.social haben uns erzählt, wie ihre Forschung davon profitiert hat. Das komplette Interview gibt's auf unserer Jubiläumsseite: www.diw.de/de/diw_01.c....
Außergewöhnliche Förderung für innovative Forschung ERC Grant
November 4, 2025 at 1:39 PM
Reposted by Hannes Ullrich
digitalecon.org
#VIDEseminar is coming up tomorrow! 👇
digitalecon.org DigitalEcon.org @digitalecon.org · 11d
🚨 Coming up at #VIDEseminar: Julie Holland Mortimer (Wash U)

“The Effect of Ad-Supported Plans on Content Offerings of Streaming Platforms”

🔜 Wed, November 5, 11am New York, 5pm Berlin. Open to anyone!

Further information: www.digitalecon.org/seminar
ABSTRACT We examine how the shift of streaming platforms to an advertiser-supported revenue model affects their content offerings and consumers. This shift forces platforms to adjust their content strategies, though the direction is unclear. Platforms may aim to increase ad impressions by offering content that appeals to a broad audience, thereby driving up viewership. Alternatively, they may seek to increase the value of impressions by targeting niche audiences, who are typically more valuable to advertisers. These changes also impact consumers: while they generally dislike ads, consumers might benefit from adjusted content offerings if aligning with their preferences. We plan to answer this question using data on content offerings of platforms and consumer viewership.
November 4, 2025 at 1:35 PM
Reposted by Hannes Ullrich
diw.de
Der Vorsitzende der Monopolkommission @tomasoduso.bsky.social fordert strukturelle Massnahmen im Energiesektor: Im Strommarkt müssten Preise nach Netzknoten oder Zonen gereget werden. Bei der Ladeinfrastruktur für E-Mobilität drohe ein Monopol durch die Autobahnstandorte.

www.diw.de/de/diw_01.c....
»Wir stehen im Energiesektor vor strukturellen Problemen, die jetzt angegangen werden müssen. Nichtstun ist die teuerste Option« Zitat Tomaso Duso
November 4, 2025 at 12:56 PM
Reposted by Hannes Ullrich
drtomemery.bsky.social
Applications for MCSA are up 64%! 50% now come from outside the EU. Trump effect?

The European Research market just got a hell of a lot more crowded.

EU should turn on the tap

marie-sklodowska-curie-actions.ec.europa.eu/news/msca-po...
MSCA Postdoctoral Fellowships 2025 receives record number of 17,058 proposals
This year’s annual MSCA Postdoctoral Fellowships call has attracted considerable interest from the research community with 17,058 proposals submitted.
marie-sklodowska-curie-actions.ec.europa.eu
October 22, 2025 at 2:11 PM
Reposted by Hannes Ullrich
podszun.bsky.social
Rheinmetall & Rüstungsmilliarden: Die @faznet.bsky.social weist heut nochmal auf die Warnungen der #Monopolkommission hin: wir müssen die Chance für Innovationen nutzen und dürfen uns nicht von einzelnen Unternehmen abhängig machen. #Wettbewerb #KI #defence

www.faz.net/aktuell/wirt...
Rheinmetall an allen Fronten – jetzt auch im Drohnengeschäft
Der Rüstungskonzern mischt jetzt auch bei den Drohnen mit. Führt im deutschen Aufrüstungsprojekt am Platzhirschen und seinem Chef Armin Papperger kein Weg mehr vorbei?
www.faz.net
November 3, 2025 at 10:24 AM
Reposted by Hannes Ullrich
jfbonnefon.bsky.social
It's hiring season at @iast.fr!

- 2y research postdoc contract
- Full autonomy, you are your own PI
- Awesome multidisciplinary environment
- All social and behavioral sciences welcome
- Seed funding for projects and workshops
- Gorgeous city in the south of France

www.iast.fr/research-fel...
September 20, 2025 at 9:15 AM
Reposted by Hannes Ullrich
hetanshah.bsky.social
This is good on how fundamental research can lead to unanticipated applications. I especially like the study of root vegetables leading to flat screen TVs (through the discovery of liquid crystals)
www.nature.com/articles/d41...
7 basic science discoveries that changed the world
Ozempic, MRI machines and flat screen televisions all emerged out of fundamental research decades earlier — the very types of study being slashed by the US government.
www.nature.com
October 31, 2025 at 1:23 PM
Reposted by Hannes Ullrich
pettertornberg.com
Is social media dying? How much has Twitter changed as it became X? Which party now dominates the conversation?

Using nationally representative ANES data from 2020 & 2024, I map how the U.S. social media landscape has transformed.

Here are the key take-aways 🧵

arxiv.org/abs/2510.25417
October 30, 2025 at 8:09 AM
Reposted by Hannes Ullrich
dieworkwear.bsky.social
"go to TikTok. See for yourself."
Pop Base tweets: "Kim Kardashian said on ‘The Kardashians’ that she believes the moon landing was fake: “They’re gonna say I’m crazy no matter what, but like, go to TikTok. See for yourself. […] There’s no gravity on the moon. Why is the flag blowing? The shoes that they have in the museum that they wore on the moon is a different print in the photos. Why are there no stars?”"
October 31, 2025 at 4:25 AM
Reposted by Hannes Ullrich
georgweizsaecker.bsky.social
A long way to go for 🇪🇺 in academia - but worth it.

Informative PBS clip on the situation in the US👇🏼
lorak.bsky.social Lora Kolodny @lorak.bsky.social · 12d
A poll from the journal Nature found that 75% of researchers in the U.S. are considering leaving the country. That includes a man who’s been dubbed the "Mozart of Math." (This PBS story on the scientific brain drain is heartbreaking & ominous for medicine, imo.) www.youtube.com/watch?v=yLvO...
Top researchers consider leaving U.S. amid funding cuts: 'The science world is ending'
YouTube video by PBS NewsHour
www.youtube.com
October 31, 2025 at 6:11 AM
Reposted by Hannes Ullrich
digitalecon.org
🚨 Coming up at #VIDEseminar: Julie Holland Mortimer (Wash U)

“The Effect of Ad-Supported Plans on Content Offerings of Streaming Platforms”

🔜 Wed, November 5, 11am New York, 5pm Berlin. Open to anyone!

Further information: www.digitalecon.org/seminar
ABSTRACT We examine how the shift of streaming platforms to an advertiser-supported revenue model affects their content offerings and consumers. This shift forces platforms to adjust their content strategies, though the direction is unclear. Platforms may aim to increase ad impressions by offering content that appeals to a broad audience, thereby driving up viewership. Alternatively, they may seek to increase the value of impressions by targeting niche audiences, who are typically more valuable to advertisers. These changes also impact consumers: while they generally dislike ads, consumers might benefit from adjusted content offerings if aligning with their preferences. We plan to answer this question using data on content offerings of platforms and consumer viewership.
October 30, 2025 at 7:10 PM
Reposted by Hannes Ullrich
aaronsojourner.org
It's that time of year again...
#EconSky
aaronsojourner.org Aaron Sojourner @aaronsojourner.org · Sep 15
Econ job market candidate intros.

Candidates, communicate:
1) your name, program, & fields,
2) image of JMP title & abstract + Alt Text,
3) #EconJMP, &
4) a link to your website.

Employers, browse & interact respectfully.

Everyone else, shhhh.
📉📈
October 30, 2025 at 2:27 PM
Reposted by Hannes Ullrich
joshua-goodman.com
I'd love to help make BlueSky one of the places where young scholars introduce themselves and their work to the world.

If you're a PhD student whose work at least partially focuses on economics of education or education policy, reply to this thread and I'll highlight your work.
October 30, 2025 at 1:23 PM
Reposted by Hannes Ullrich
emollick.bsky.social
In discussions of AI and jobs, we put too much emphasis on the technology and not enough on the corporate leaders who are actually making decisions about what they want to do with AI & its implications.

It is a time where CEO vision matters a lot, and you can see a contrast in Amazon and Walmart
October 30, 2025 at 2:01 PM
Reposted by Hannes Ullrich
trfetzer.com
The recent announcement by @BillGates to re-evaluate climate policies should be interpreted in a geopolitical light. Our AIPNET production network highlights the challenge that the US is facing vis-a-vis China. Let me walk you through what I think is happening in this domain...
October 30, 2025 at 12:55 PM
Reposted by Hannes Ullrich
economicsinten.bsky.social
Have finally deactivated our Twitter account. It was great whilst it lasted & good for promoting our podcast but at the end of the day, we can't justify being there anymore. Hopefully enough folk can see our work via BlueSky, Insta & other platforms. 🤞#EconSky podcasts.apple.com/gb/podcast/e...
Economics In Ten
Social Sciences Podcast · Economics In Ten is your go-to podcast if you want to learn about the lives, times and ideas of the world's greatest economic thinkers. Each episode is a fun exploration of a...
podcasts.apple.com
October 29, 2025 at 10:28 AM
Reposted by Hannes Ullrich
bsoeberlin.bsky.social
📢 Call for Applications: 2026 PhD Program

Opportunities across four different PhD tracks:

🔹 PhD in Economics
🔹 PhD in Accounting
🔹 PhD in Finance
🔹 PhD in Management

❗ Application Deadline: January 15, 2026

More information👇
berlinschoolofeconomics.de/phd-program/...

#phdcallforapplications
October 28, 2025 at 4:08 PM
Reposted by Hannes Ullrich
andreasloeschel.bsky.social
Alle Systeme blinken rot. Es geht zu langsam voran mit dem Klimaschutz, auch in Deutschland. Kurz vor der Weltklimakonferenz habe ich mit Annica Kramer und Noah Raffenberg von @focusonline gesprochen.
www.focusplus.de/politik/alle...
October 28, 2025 at 11:07 AM