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Frieder Rodewald

@frodewald

πŸŽ“ PhD-Student of Social Data Science 🧐 Data Donation β€’ Online Behavior β€’ Measurement β€’ Privacy Behavior 🏫 MZES, Mannheim πŸ•ΈοΈ https://frieder-rodewald.de πŸ‘» for everything else, let’s see what I do here

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04.11.2023
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Latest posts by Frieder Rodewald @frodewald

⏰ Last chance to register for my GESIS course

▢️ Bayesian Modeling: From Foundations to Custom Solutions

πŸ“… Apr 16–17 & 23–24 (online)

We cover:
β€’ Foundations of Bayesian inference
β€’ Applied modeling with brms in R
β€’ Building custom models in Stan

Feel free to get in touch if you have questions.

10.03.2026 14:40 πŸ‘ 6 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
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🧡on my new paper "Synthetic personas distort the structure of human belief systems" w Roberto Cerina I'm v excited about...

🚨 Do synthetic samples look like human samples?

We compare 28 LLMs to the 2024 General Social Survey (GSS) to find out + develop host of diagnostics...

25.02.2026 19:46 πŸ‘ 167 πŸ” 78 πŸ’¬ 6 πŸ“Œ 20

Join us tomorrow for this exciting talk by @klaramueller.bsky.social in the MZES Social Science Data Lab!

Details and Zoom link ⬇️

24.02.2026 15:05 πŸ‘ 12 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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We are delighted to welcome Leah von der Heyde! Leah joined KODAQS as a postdoc in the SDM department at GESIS, focusing on data quality aspects of survey data using AI methods. Leah's research explores AI usability for measuring and representing public opinion.

#KodaqsAcademy #AIinSurveys

17.02.2026 12:28 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Weβ€˜re very excited for the next edition of the Summer School for Women* in Political Methodology in Mannheim! ✨

Join us and apply until 1 March!

More info in @melinscribe.bsky.socialβ€˜s thread below and here: summerschoolwpm.org

Application form: sosci.sowi.uni-mannheim.de/wpm/

02.02.2026 17:08 πŸ‘ 28 πŸ” 21 πŸ’¬ 0 πŸ“Œ 0
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🚨 #Bots and #LLMs threaten the integrity of online surveys and public opinion research, but we can identify LLM-generated text in open narrative responses by fine-tuning #BERT.

New #OpenAccess article with @jkhoehne.bsky.social @rubac.bsky.social @carohaensch.bsky.social.

πŸ‘‰ doi.org/10.1177/0894...

20.01.2026 06:26 πŸ‘ 29 πŸ” 13 πŸ’¬ 0 πŸ“Œ 1
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Personal update: proud owner of the first pair of MZES merchandise socks. Being a staff representative @mzesunimannheim.bsky.social for four years was totally worth it! πŸ’ͺπŸ˜…

18.12.2025 11:23 πŸ‘ 11 πŸ” 2 πŸ’¬ 1 πŸ“Œ 1
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this shit is just beyond parody, man

05.12.2025 17:33 πŸ‘ 27489 πŸ” 5997 πŸ’¬ 6237 πŸ“Œ 4255

That’s an awesome project - thank you!

20.08.2025 21:09 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

My Quarto #rstats tip for big/complex papers is to set up R scripts that do data processing/modeling & save plots/outputs as RDS files. The Quarto can then load the RDS file & make any modifications to the ggplot2 object before plotting. This avoids unwieldy long Quarto docs /w complex caching.

15.08.2025 15:32 πŸ‘ 21 πŸ” 3 πŸ’¬ 2 πŸ“Œ 2
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9.2% of all citations go to just 0.32% of psychology articles.

To have the most impact, post-publication peer-review should focus on these influential articles with β‰₯30 citations per year.

@error.reviews will systemically sample from such articles.

Blog post:
mmmdata.io/posts/2025/0...

13.08.2025 15:58 πŸ‘ 38 πŸ” 10 πŸ’¬ 1 πŸ“Œ 2

Autofreie Quadrate & BΓ€ume auf alle ParkplΓ€tze πŸ’β€β™€οΈ

02.07.2025 18:27 πŸ‘ 7 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Linke Influencer auf TikTok haben aufgeholt Vor der Bundestagswahl wurde TikTok erstmals zur Wahlkampfarena für alle großen Parteien. Eine Auswertung exklusiver User-Daten zeigt: Vor allem die Linke hat massiv aufgeholt. Experten Àußern Kritik ...

Habt ihr schon vom grâßten Tik Tok-Datensammelprojekt in D gehârt?

@weizenbauminstitut.bsky.social, @dizh.bsky.social, @br24.de & @stuttgarter-nachrichten.de haben For You-Page von ca. 700 Nutzer:innen ausgewertet. πŸ“²

Spannend: Filterblasen-Theorie auch hier wiederlegt
www.br.de/nachrichten/...

22.05.2025 08:58 πŸ‘ 26 πŸ” 11 πŸ’¬ 3 πŸ“Œ 0
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Attending this amazing workshop on data donations by @valeriehase.bsky.social @frodewald.bsky.social πŸ‘©πŸ»β€πŸ’»
#COMPTEXT2025

24.04.2025 09:21 πŸ‘ 33 πŸ” 11 πŸ’¬ 1 πŸ“Œ 0
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A stimulating morning of hands-on tutorials at #COMPTEXT2025 introduced participants to advanced techniques in digital trace data collection, visual content analysis, and Bayesian text modelling. The day is far from over β€” stay tuned for more cutting-edge methods in action.

24.04.2025 13:42 πŸ‘ 29 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

holy hell this is smart

18.02.2025 15:18 πŸ‘ 154 πŸ” 33 πŸ’¬ 2 πŸ“Œ 2
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The German left has lost its monopoly on class consciousness The German radical right has mobilised around a working class identity that pits hard-working β€œmaker...

This is very interesting and more data-driven than you might think from the title. Also comes up with an actual idea what centre-left parties could do to build a new coalition. No idea if this would work, but at least it's something constructive #farright #Germany #btw25

14.02.2025 17:10 πŸ‘ 54 πŸ” 18 πŸ’¬ 2 πŸ“Œ 3

Nice :D - There’s always next year to submit this :)

21.12.2024 08:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Kick-off for our DFG project! With multimodal ML, we study 15,000h of German parliamentary speeches. Stay tuned for how MPs handle populism, how facial expressions send coalition signals and dynamics of salience. #DreamTeam #ScienceRocks #DankeDFG @pluggedchris.bsky.social @ankuepfer.bsky.social

18.12.2024 17:18 πŸ‘ 18 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Our systems now automatically track online ad spending on Meta and Google by 109,592 advertisers from 729 parties in 51 countries. More at trends.whotargets.me

09.12.2024 15:43 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 2
How to Install R and RStudio on Linux Mint 21: An In-Depth User Guide – TheLinuxCode Are you looking to unlock the power of R for advanced analytics and statistical computing on Linux? Installing R and RStudio on Linux Mint 21 provides a robust data science workstation. In this 2,800+...

Cool !:) Using R on Fedora too with a system copr and it works way smoother and faster - can definitely recommend it. There seems to be something similar for apt too: thelinuxcode.com/install-r-an...

By using install.packages() you will always have to build each package yourself which takes time…

09.12.2024 08:16 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A screenshot of the call for applications.

A screenshot of the call for applications.

🚨 CfA: MZES-DVPW Conference "Methods of Political Science"

πŸ—“οΈ Mannheim, Mar 27-28, 2025

⏰ Deadline: Dec 16, 2024

πŸ”—Apply via sosci.sowi.uni-mannheim.de/mzes-dvpw-me...

@gessler.bsky.social, @aleininger.bsky.social, @hannahrajski.bsky.social, Oliver Rittmann & I look forward to your submissions!

20.11.2024 12:57 πŸ‘ 46 πŸ” 37 πŸ’¬ 0 πŸ“Œ 5
The G.I. Bill, Standardized Testing, and Socioeconomic Origins of the U.S. Educational Elite Over a Century
Ran Abramitzky, Jennifer K. Kowalski, Santiago PΓ©rez, and Joseph Price
NBER Working Paper No. 33164
November 2024
JEL No. 123, 124, N32
ABSTRACT
We compile, transcribe, and standardize historical records for 2.5 million students at 65 elite (private and public) U.S. colleges. By combining these data with more recent survey and administrative data, we assemble the largest dataset on the socioeconomic backgrounds of students at American colleges spanning the last 100 years. We document the following: First, despite a large increase in the share of lower-income students in the overall college-going population, the representation of these students at elite private or public colleges has remained at similarly low levels throughout the last century. Second, the representation of upper-income students at elite colleges decreased after World War II, but this group has regained its high representation since the 1980s. Third, while there has been no increase in the economic diversity of elite private and public colleges, these colleges have become more racially and geographically diverse. Fourth, two major policy changes in the history of American higher education, namely the G.I. Bill after World War II and the introduction of standardized tests for admissions, had little success in increasing the representation of lower- and middle-income students at elite colleges.

The G.I. Bill, Standardized Testing, and Socioeconomic Origins of the U.S. Educational Elite Over a Century Ran Abramitzky, Jennifer K. Kowalski, Santiago PΓ©rez, and Joseph Price NBER Working Paper No. 33164 November 2024 JEL No. 123, 124, N32 ABSTRACT We compile, transcribe, and standardize historical records for 2.5 million students at 65 elite (private and public) U.S. colleges. By combining these data with more recent survey and administrative data, we assemble the largest dataset on the socioeconomic backgrounds of students at American colleges spanning the last 100 years. We document the following: First, despite a large increase in the share of lower-income students in the overall college-going population, the representation of these students at elite private or public colleges has remained at similarly low levels throughout the last century. Second, the representation of upper-income students at elite colleges decreased after World War II, but this group has regained its high representation since the 1980s. Third, while there has been no increase in the economic diversity of elite private and public colleges, these colleges have become more racially and geographically diverse. Fourth, two major policy changes in the history of American higher education, namely the G.I. Bill after World War II and the introduction of standardized tests for admissions, had little success in increasing the representation of lower- and middle-income students at elite colleges.

Holy crap this is an astounding piece of historical research

Will post ungated link later today unless someone beats me to it

www.nber.org/system/files...

18.11.2024 12:47 πŸ‘ 1381 πŸ” 467 πŸ’¬ 66 πŸ“Œ 75
Two maps the the contiguous United States. The first is colored with the 4 time zones. Above that map states "say no to time zones". The bottom is the same map but with a continuous color gradient. Above that map states "say yes to the time gradient"

Two maps the the contiguous United States. The first is colored with the 4 time zones. Above that map states "say no to time zones". The bottom is the same map but with a continuous color gradient. Above that map states "say yes to the time gradient"

We must stand against the arbitrary categorization of continuous variables!

... and that's why I'm proud to announce my support of abolishing time zones in favor of the time gradient

14.11.2024 13:09 πŸ‘ 275 πŸ” 40 πŸ’¬ 26 πŸ“Œ 5

Gestern abend war ich ja noch sehr spÀt auf der Hotelterasse, um etwas den Südhimmel zu fotografieren. Bei Objekten, die sehr hoch am Himmel stehen, stâßt das Seestar S50 leider an seine Grenze, und bekommt die Nachführung nicht mehr so gut hin. WÀhrend ich darauf gewartet habe, dass meine 1/

16.08.2024 15:47 πŸ‘ 12 πŸ” 1 πŸ’¬ 3 πŸ“Œ 0

Ich finde ja, mit solchen Qualifikationstellen hat sich die Uni als Qualifikationsort disqualifiziert. #IchBinHanna

18.07.2024 09:34 πŸ‘ 37 πŸ” 7 πŸ’¬ 4 πŸ“Œ 2
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The fake data were coming from inside the lab
datacolada.org/117

12.06.2024 11:35 πŸ‘ 50 πŸ” 14 πŸ’¬ 1 πŸ“Œ 7
An infographic of Taylor's thesis defense. Moves through and describes all 4 of her thesis papers. The title of her thesis was "Socio-ecological well-being: Resources at the personality,k activity, and community level (Taylor's version)"

An infographic of Taylor's thesis defense. Moves through and describes all 4 of her thesis papers. The title of her thesis was "Socio-ecological well-being: Resources at the personality,k activity, and community level (Taylor's version)"

My PhD student, Taylor Hill, successfully defended her thesis on Tuesday! She's not here on Bluesky, but one really cool thing she did was get an infographic of her thesis drawn live from the defense. It's so cool, I had to share.

Check it out, and the service she used is here:
www.emmarichard.ca

08.06.2024 21:00 πŸ‘ 28 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0

Yeah, this is pretty much it for me wrt chrome.

02.06.2024 20:10 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Our "Many Voices" 75-author collaboration led by Yuto Ozaki finding global regularities in music-speech relationships is now out on the cover of Science Advances: science.org/doi/10.1126/...

Full video of 18 coauthors singing/speaking in our own languages at youtu.be/a4eNNrdcfDM

16.05.2024 05:01 πŸ‘ 18 πŸ” 14 πŸ’¬ 1 πŸ“Œ 3