Rafael H. M. Pereira 🚡 Urban Demographics
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urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics
@urbandemog.bsky.social
7K followers 890 following 180 posts

Researcher Ipea Brazil | Visiting prof @geo_uoft | PhD @TSUOxford | Structured procrastination on Cities, Urban mobility, Accessibility, Equity, Data science, R. About: www.urbandemographics.org/

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urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · May 19
New preprint where we propose "Rethinking Congestion as Lost Access"
📑 osf.io/fjdbs_v2 Short 🧵!

Reposted by Rafael H. M. Pereira

Reposted by Rafael H. M. Pereira

Reposted by Nita A. Farahany, Christopher D. Manning, Eric P. Xing , and 8 more

Reposted by Rafael H. M. Pereira

Reposted by Jan W. Mueller, Linda J. Skitka, Rafael H. M. Pereira , and 8 more

adambonica.bsky.social
Adam Bonica @adambonica.bsky.social · 5d
The Abundance movement often points to environmental groups as the obstacles to building. But who actually files the lawsuits blocking projects? It’s not environmental groups. It’s been lawyered-up HOAs protecting property values all along. Regulation by litigation is the problem.
Bar chart titled “Who’s Really Blocking California Development?” showing the share of CEQA lawsuits by plaintiff type. HOAs and NIMBY groups account for the majority at 54%. Business and commercial plaintiffs file 20% of cases, government entities 13%, environmental groups 8%, tribal or cultural groups 4%, and labor unions 2%. The chart notes the analysis is based on 1,234 CEQA court opinions from 1973–2025 using CourtListener data, with HOAs/NIMBYs defined as homeowner associations, neighborhood groups, and ad hoc project-opposition groups.

Reposted by Rafael H. M. Pereira

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 7d
How the magnitude of the causal effect of a policy (z) on the outcome variable varies over time (x) and distance to policy location (y) #dataporn

Reposted by Rafael H. M. Pereira

Reposted by Rafael H. M. Pereira

Reposted by Rafael H. M. Pereira

Reposted by Richard Blundell, Karl Deisseroth, Marcin Zaborowski , and 13 more

Reposted by Rafael H. M. Pereira

thiagokrause.bsky.social
Thiago Krause @thiagokrause.bsky.social · 11d
Transcribed over 7,000 folios of eighteenth-century merchant letters with @leotranscribes.bsky.social. Now I just need to read them... 😅

Reposted by Rafael H. M. Pereira

knaaptime.com
eli knaap @knaaptime.com · 11d
neat.

I notice somebody asked for a python version on the duckplyr github and they recommended ibis ibis-project.org/posts/ibis-d... which seems like it's probably the answer im looking for (!) (cc @urschrei.bsky.social , @jreades.bsky.social , @urbandemog.bsky.social )
Ibis
the portable Python dataframe library
ibis-project.org

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 12d
Lol. I understand you, though. There are convenient ways of using duckdb in R with {duckplyr} and {duckspatial}. I'm sure something similar should be created in Python soon

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 12d
Polars is OK, but have you heard the word of #DuckDb, our lord true savior of larger-than-memory data analysis?

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 13d
How well do LLMs generate R code?
skaltman-model-eval-app.share.connect.posit.cloud #rstats #llm

Reposted by Rafael H. M. Pereira

stephenturner.us
Stephen Turner @stephenturner.us · 13d
Which LLM writes the best R code? posit.co/blog/r-llm-e... Interestingly, GPT-5.2 underperformed OpenAI’s own older/legacy GPT-5, as well as Gemini 3 and all the Claude models. #Rstats

Reposted by Gavin A. Schmidt, Rafael H. M. Pereira, Evan Roberts

humantransit.bsky.social
Jarrett Walker @humantransit.bsky.social · 14d
An astonishing percentage of Americans are open to car-free living.

The problem isn't attitudes. The problem is the failure to invest in viable options.

humantransit.org/2025/12/many...
Many Americans Are Open to Car-Free Living — Human Transit
Is Americans a “car culture” or are they “car dependent”?  Do they drive because they love driving, or are they in an unhealthy relationship with a substance it would be happy to do without?  Obviousl...
humantransit.org

Reposted by Karen Lucas

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 14d
Cc @pcastaneda.bsky.social @aag-tgsg.bsky.social @drkarenlucas.bsky.social @edabeyazit.bsky.social @wojciechkeblowski.bsky.social @plyushteva.bsky.social

urbandemog.bsky.social
Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 14d
CfP special issue on "Decolonising Research in Transport Geography", in JTG. Please help us spread the word!
Deadline 30 Sep 2026
More info www.sciencedirect.com/special-issu...
Guest editors:
Qiyang Liu, Peking
Zihao An, U. Leeds
Rafael H. M. Pereira, Ipea
Zahara Batool, Leeds
Tim Schwanen, Oxford