Jordan D. Klein

New MPIDR press out today on our PNAS Letter (published this week): www.pnas.org/doi/10.1073/...

Migration fell during the pandemic, but not in the ways we think.

Looking beyond total flows shows how border closures curtailed outflows, stranded migrants, and produced unintended consequences.

17.12.2025 11:23 — 👍 2    🔁 0    💬 0    📌 0

World map with interconnected lines and text about migration during the pandemic

Diagram shows estimated changes in the migrant population after a one-month travel ban for France, Germany, Italy, Spain, and the US by country of origin.

Estimate of the change in the migrant population due to a one-month travel ban in France, Germany, Italy, Spain, and the US by country of origin.

Jordan D. Klein & Ingmar Weber published a Letter to the Editor in Proceedings of the National Academy of Sciences that opens a conversation on the findings of Chi et al (Measuring global migration flows using online data). https://www.demogr.mpg.de/go/PNAS-Letter-Editor

17.12.2025 10:15 — 👍 12    🔁 4    💬 0    📌 1

GitHub - jordan-klein/covid19-mortality-gradients-brazil Contribute to jordan-klein/covid19-mortality-gradients-brazil development by creating an account on GitHub.

Data + code available here: github.com/jordan-klein...
#Epi #OpenScience #InfectiousDisease #HealthEquity

28.04.2025 15:44 — 👍 8    🔁 0    💬 0    📌 0

I show how structural inequities—not differential intervention uptake—likely drove death gaps. Targeting vulnerable areas for vax + equal NPIs could’ve flipped this dynamic.

Geo-spatial SEIRD model of counterfactual scenarios ➡️ fresh policy insight on making future outbreak control more equitable

28.04.2025 15:44 — 👍 9    🔁 0    💬 1    📌 0

Must Whatever Goes up Come Down? Mortality Gradients in the Emergence of COVID-19 According to fundamental cause theory, even as disease burdens shift, social inequalities in mortality persist. Yet for emerging infectious diseases, isolating the roles played by underlying social di...

Hey Bluesky! 👋 First post here. Just dropped a preprint of the 1st national-scale, data-driven mechanistic model of socio-economic inequalities in COVID-19 mortality in 🇧🇷 doi.org/10.1101/2025...

28.04.2025 15:44 — 👍 32    🔁 4    💬 1    📌 0