Rafael H. M. Pereira

Rafael H. M. Pereira 🚡 Urban Demographics

@urbandemog.bsky.social

7K followers 890 following 170 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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Engineering 29%

Economics 25%

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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 🧵!

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 4h

But has he published an R package on CRAN ? #rstats
¯\_(ツ)_/¯

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 22h

- Site do AOP-Lab www.ipea.gov.br/acessooportu...
- Site da premiação www.gov.br/cidades/pt-b...

Acesso a Oportunidades

Pesquisador (Ipea)

www.ipea.gov.br

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 22h

Um destaque do trabalho é que gente gera estimativas em alta resolução espacial de acesso a postos de emprego, serviços públicos de saúde, educação e proteção social por modo de transporte para as maiores cidades do Brasil. Mais info no site abaixo :)

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 22h

O AOP-Lab é um grupo de pesquisa e de desenvolvimento de ferramentas computacionais e de dados para acessibilidade espacial e planejamento urbano, com foco em questões de desigualdades sociais e de mobilidade urbana sustentável. +

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 22h

O Ministerio das Cidades criou ano pasado o Prêmio Bicicleta Brasil p/ reconhecer projetos que incentivem o uso da bicicleta e a melhoria das condições de mobilidade urbana. Esse ano, o Lab de Acesso a Oportunidades do @ipeaonline recebeu o prêmio de 1o lugar na categoria Concientização🥳

Reposted by Rafael H. M. Pereira

Gabriel M Ahlfeldt @ahlfeldt.bsky.social · 1d

Ever wondered what housing value proxy for sales prices to use? Long story (in our @cesifo.org DP) short: Assessed values are good for quantification of QSMs. List prices better for hedonic valuation using panel identification. www.ifo.de/en/cesifo/pu... @hans-koster.bsky.social

Reposted by Robb Willer, Rafael H. M. Pereira, Robert C. Richards , and 1 more Robb Willer, Rafael H. M. Pereira, Robert C. Richards, Nathan P. Kalmoe

Angela Li @angelamli.bsky.social · 2d

👉 Our new paper uses daily mobility data to show that spatial isolation is much more common today among those living in advantaged neighborhoods than the converse.

👩🏻‍💻 Lots of massive data wrangling and careful assumptions about mobility data needed - but check it out here! doi.org/10.1177/0042...

Abstract for "The truly isolated: Spatial isolation of advantage in the United States" by Shannon Rieger, Angela Li, and Patrick Sharkey, published at Urban Studies

Reposted by Rafael H. M. Pereira

Abdirashid Dahir @abdirashid.bsky.social · 3d

Excited to share that the 1st paper of my dissertation has been published! In this study, we developed and applied the novel JTEV framework in Columbus, OH. Thankful to Jeffrey Bielicki, Jeffrey Jacquet and my PhD advisor @huyentkle.bsky.social

Link: authors.elsevier.com/c/1m7I87tZ6a...

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 3d

@filipecampante.bsky.social has two very interesting papers related to this:
- www.aeaweb.org/articles?id=...
- www.aeaweb.org/articles?id=...

Capital Cities, Conflict, and Misgovernance

(July 2019) - We investigate the links between capital cities, conflict, and the quality of governance, starting from the assumption that incumbent elites are constrained by the threat of insurrection...

www.aeaweb.org

Reposted by Rafael H. M. Pereira

Environmental Change Institute, University of Oxford @ecioxford.bsky.social · 7d

New Nature Energy @nature.com study shows the UK can reach net zero faster, cheaper & with fewer risks by cutting energy demand.

ECI’s Prof Christian Brand @profchristianbrand.bsky.social led the transport analysis in this unique gov–research collaboration.

➡️: www.eci.ox.ac.uk/news/less-en...

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 7d

I would add WebGL-based visualization libraries (e.g. #deckgl and #mapgl). They are not exactly super new but they're really centraly in how spatial data science has changed over the past 10-ish years.

ps. #GeoParquet, and #DuckDB + spatial ! would also be at the top of my list!

Jakub Nowosad @jakubnowosad.com · 8d

What are the most exciting trends you’re seeing in spatial data science lately?
Some of mine:

- New file formats (e.g. #GeoParquet)
- Geospatial DBs (e.g. #DuckDB + spatial)
- Global discrete grids

What would you add?

#Geospatial #GISchat #RSpatial #GeoPython

A discrete global grid (DGG) is a mosaic that covers the entire Earth’s surface. Mathematically it is a space partitioning.

Reposted by Rafael H. M. Pereira

Jakub Nowosad @jakubnowosad.com · 8d

Reposted by Rachel S. Franklin

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 9d

Glad to share this paper is now published "A family of accessibility measures derived from spatial interaction principles" journals.plos.org/plosone/arti...
A delightful colab led by @soukhova.bsky.social !

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 10d

Em minha defesa, recomendei pq era onde os taxistas abasteciam. Eu nunca lavei nada lah kkkkk

Reposted by Rafael H. M. Pereira

Emi Tanaka @emitanaka.org · 11d

Congratulations to my student, Maggie Ma, for publishing her first #rstats package {ggincerta} on CRAN 🥳

Spatial uncertainty visualisation (bivariate, pixel, exceedance, glyph), like {Vizumap}, but fully integrated with ggplot2 -- a much simpler API with all the advantages of the ggplot2 system.

exceedance plot

ggplot(nc) + geom_sf(aes(fill = duo_exceed(value, sd)))

bivariate plot

ggplot(nc) + geom_sf(aes(fill = duo(value, sd)))

glyph plot

ggplot(nc) + geom_sf_glyph(mapping = aes(v1 = value, v2 = sd))

pixel plot

ggplot(nc) + geom_sf_pixel(mapping = aes(v1 = value, v2 = sd))

Reposted by Rafael H. M. Pereira

Qiusheng Wu @giswqs.bsky.social · 11d

I’m thrilled to share that my new book (Spatial Data Management with DuckDB) is now published! 🎉

At 430 pages, this book provides a practical, hands-on guide to scalable geospatial analytics and visualization using DuckDB. All code examples are open-source and freely available on GitHub.

Reposted by Lisa W. Fazio, Robert W. Wallace, Rafael H. M. Pereira , and 3 more Lisa W. Fazio, Robert W. Wallace, Rafael H. M. Pereira, Fabián Muniesa, Rebecca Tushnet, Julia M. Wright

mtsw @mtsw.bsky.social · 11d

A lot of education discourse is at root an inability to decide whether the purpose of our education system is to 1) teach material and measure learning 2) reward students who work hard 3) separate the smart kids (destined for smart guy jobs) from the dumb kids (destined to serve the smart guys)

Rafael H. M. Pereira 🚡 Urban Demographics @urbandemog.bsky.social · 13d

Oficina de acessibilidade espacial com #r5rstats no R hoje na #anpet2025
Material do curso aqui ipeagit.github.io/oficina_aces...

Reposted by Hugo Mercier, Rafael H. M. Pereira, Rebecca Sear

Jorge Peña @jorgeapenas.bsky.social · 14d

📣 Are you a PhD student in the quantitative social sciences interested in interdisciplnary research? Join us at the Toulouse Summer School in Quantitative Social Sciences (25 May-19 Jun 2026) at @tse-fr.eu.

Apply by 15 Dec 2025 🎓🔍

👉 More info + application: www.tse-fr.eu/toulouse-sum...

Toulouse Summer School in Quantitative Social Sciences

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