“The past is never dead. It’s not even past.” In a new study, we show that decades of violence mean that four out of ten Colombians alive today have lost family members as a result of the Colombian Armed Conflict. This 'demographic memory' of war has implications for post-conflict reconciliation 👇

Weaponizing Kinship: Four out of ten Colombians have lost a family member in the conflict 🇨🇴
Enrique Acosta, Diego Alburez, Maria Gargiulo, & Catalina Torres quantified how many Colombians have ever lost at least a family member to conflict-related violence.
www.demogr.mpg.de/go/weaponkinship

📢Job Offer‼️Post-Doctoral Researcher‼️We are seeking to appoint a full-time post-doctoral researcher to join the Research Group on Labor Demography. Christian Dudel
https://www.demogr.mpg.de/en/career_6122/jobs_fellowships_1910/post_doctoral_researcher_15072/
#LaborDemography #PostDoc #DataScience

I'll be teaching again for Barcelona Summer School of Demography, "Demography with R" 6-10 July: ced.cat/en/bcn4seaso... You can do this program in person or online. Sign up, it's fun to do demography! @cedemografia.bsky.social

Arriaga Meets Kitagawa. Life Expectancy Decomposition With Population Subgroups An Arriaga decomposition partitions differences in life expectancy into contributions from mortality rate differences in each age. A Kitagawa decomposition partitions a difference between two weighte...

Another way to use Kitagawa decomposition in demography:-) onlinelibrary.wiley.com/doi/10.1111/...

📢 Event alert: UNICEF + UN IGME #UNSC57 Measuring Child Mortality & Overcoming Data Gaps 3 Mar | 1:15–2:30 EST | NY + Online: forms.office.com/e/BNZxS0dZ9  Practical approaches — mobile phone surveys + analytical tools — to collect child mortality data where CRVS is incomplete. #data #mortality

📣Calls of Abstracts‼️Second International Workshop on Life Course Analysis
Theory, methods, & applications
📅August 18-19, 2026
🗺️Hertie School, Berlin
https://www.demogr.mpg.de/en/news_events_6123/calendar_1921/second_international_workshop_on_life_course_analysis_14953
Christian Dudel Carla Rowold

sex1 sex2 sex3 sex4 sex5 sex6 sex7 sex8 Boy Girl Boy Boy Boy Boy Girl Girl Boy Girl Girl Boy Boy Boy Girl Boy Girl Girl Boy Girl Boy Boy Boy Girl Boy Boy Boy Girl Boy . Boy . Girl Boy Boy Boy Girl Girl Girl Girl Boy . . . . Boy

What if every family stops having children as soon as they have a boy? Would the sex ratio end up skewed one way or the other?

This is what it would look like for 25 random families following that rule (with a normal male/female sex ratio of 105/100.)

/1

Gaza: Study Reveals Unprecedented Losses of Life & Life Expectancy
Researchers from MPIDR & the Centre for Demographic Studies (CED) investigated the impact of the conflict in Gaza on mortality. Life expectancy 2024 fell to nearly half the level expected without the war. www.demogr.mpg.de/go/GazaLE

Today, launching the World Urbanization Prospects 2025 with new UN estimates and projections of urbanization for
237 countries and areas of the world & 12,000+ cities with 50,000+ inhabitants in 2025. www.un.org/development/... - see also new online datasets and plots: population.un.org/wup/

LEdecomp: Decompose Life Expectancy by Age (and Cause) A set of all-cause and cause-specific life expectancy sensitivity and decomposition methods, including Arriaga (1984) &lt;<a href="https://doi.org/10.2307%2F2061029" target="_top">doi:10.2307/2061029<...

Over a dozen ways to decompose life expectancy, all in one (we hope) friendly interface. Please have a look at the LEdecomp R package cran.r-project.org/web/packages... See the function LEdecomp() for access to all of them. If we left something out, please shout! #rstats #demography #mortality

Check out this conference if you work on topics related to kinship structure and dynamics (within and beyond the household), caregiving, intergenerational processes, family bereavement, LGBTQ+ & chosen kinship, etc. @iussp.bsky.social Submit by 21 Jan 2026 👇 www.demogr.mpg.de/go/kinship-conference

4/11/2025 - DemoSoc Seminar: Measuring the Scale of Loss: Life Expectancy and Conflict Mortality in Gaza - Departament | Facultat de Ciències Polítiques i Socials - UPF

Measuring the Scale of Loss: Life Expectancy and Conflict Mortality in Gaza.
Enrique Acosta, Centre d'Estudis Demogràfics (CED)
Come join us: Next Tuesday 4.11 at noon. @demosocupf.bsky.social
www.upf.edu/web/politiqu...

Postdoctoral Researchers in Demography and Population Projections The Population Research Institute (PRI) at Väestöliitto – Family Federation of Finland and the University of Helsinki invite applications for three positions as Postdoctoral research fellow to study…

3 full-time positions on Probabilistic Migration Modeling at University of @helsinki.fi in collaboration with @mpidr.bsky.social and Mikko Myrskylä.

DM me if you want to know more, as I'm part of the project. Definitely DM me if you heard of conformal prediction

www.vaestoliitto.fi/en/news/post...

Postdoctoral Researchers in Demography and Population Projections The Population Research Institute (PRI) at Väestöliitto – Family Federation of Finland and the University of Helsinki invite applications for three positions as Postdoctoral research fellow to study…

Up to 3 Post-docs: Pop. Projections for Migration Scenarios, Human Capital Dev & Sust. Integration

At@pophel.bsky.social, Population Research Inst, in collab w @mpidr.bsky.social & @iiasa.ac.at .https://www.vaestoliitto.fi/en/news/postdoctoral-researchers-in-demography-and-population-projections/

Job Offer: PhD Student Position
The University of Hong Kong (HKU) and the
@mpidr.bsky.social +
@imprs-phds.bsky.social
invite applications for a 4-year PhD position. The studentship is not limited to specific topics. Apply until November 17!
www.demogr.mpg.de/en/career_61...

🙋🏻‍♀️🙋🏻‍♀️🙋🏻‍♀️

We are looking forward to the #HMD symposium next week 🎉

📢 Papers from #REVES2026 with a focus on new methods for analyzing healthy life expectancy and inequalities will be great candidates for the @genus.bsky.social Healthy Life Expectancy collection by @cosmostrozza.bsky.social & @timriffe1.bsky.social !
🔗 tinyurl.com/HLEgenus
📌01/06/2026
#demography

🎉🎊A week full of celebrations
✨Two ERC Starting Grants for the MPIDR✨
We are thrilled to announce that @marilianep.bsky.social and @ugobas.bsky.social have each been awarded with an ERC Starting Grant by the @erc.europa.eu. #ERCStG
www.demogr.mpg.de/en/news_even...
#ERCStartingGrant #longevity

The next Formal Demography Working Group is Thursday September 11 at 10am ET! @phbocquier.bsky.social will present on identifying small-area diffusion of mortality transitions using non-linear modelling. Sign up details on our website! formaldemography.github.io/working_group/

Health demographers 📣
Calling for submissions to our w. @timriffe1.bsky.social
Healthy Life Expectancy methodology collection on @genus.bsky.social! We're seeking innovative approaches to statistical modelling and empirical analysis of health inequalities 📈
📆 Submission deadline: 01/06/26
🔗 Link 👇

GitHub - timriffe/mscalc: Calculates State Occupancy Times by Age from Discrete Time Transition Probabilities Calculates State Occupancy Times by Age from Discrete Time Transition Probabilities - timriffe/mscalc

bootstrapping & Horiuchi-decomposing multistate models of late drove me to write this efficient occupancy time calculator. It avoids matrix inversion, is state-space-flexible, and is faster and more memory efficient than alternatives tested thus far: github.com/timriffe/msc...

There is an exact procedure to abridge a single-age lifetable, but is there a method to graduate an abridged one that 1. Matches lx and ex in abridged ages 2. Is fully transitive (e.g. mx-ax-qx identity and others) 3. Is reasonably smooth 4. Has standard-looking ax values (close to .5 exc tails)?

I tried recently splines on lx (5<=x<oag)and then fixed ax within 5y interval, replicating 5Lx. But not always a smoothed solution on ax. So... no 😅

Some good news to brighten up your feed: Our #R package 📦 DemoKin for the demographic analysis of kinship has a new website with extensive documentation and literature 🎉🎈 @mpidr.bsky.social If you don't know it yet, why not check it out? ivanwilli.github.io/DemoKin/inde...

Hey demographers! We're starting up the formal demography working group again! Next Friday 16 May at 11:30am ET @hggaddy.bsky.social will talk to us about challenges in estimating crisis mortality. Excited! Head to the website to sign up for Zoom details: formaldemography.github.io/working_group/

With a little delay we learned that @lpcalderonb.bsky.social, who could not attend #PAA2025, won a Best Poster Award! Her colleagues put up the poster and a note from Liliana and co-author @martinkolk.bsky.social jumped in to present the research. Congrats Liliana! @popassocamerica.bsky.social