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Alexis R. Santos

@alexisrsantos.com
1.9K followers 968 following 203 posts

Demographer and Population Health Scientist Puerto Rican 🇵🇷 + Dog lover + Salsa/Music Enthusiast. Twitter retiree. I study Demography and Population Health. Trained in Economics. www.alexisrsantos.com

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Alexis R. Santos @alexisrsantos.com · 28/09/2026
Search for the next director for @ssripennstate.bsky.social is starting! If you want to lead #SocialScience research at @pennstateuniv.bsky.social apply! psu.wd1.myworkdayjobs.com/en-US/PSU_Ac...
psu.wd1.myworkdayjobs.com
Director, Social Sciences Research Institute
APPLICATION INSTRUCTIONS: CURRENT PENN STATE EMPLOYEE (faculty, staff, technical service, or student), please login to Workday to complete the internal application process. Please do not apply here, a...
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Robert Chung @rchung.bsky.social · 15/09/2026
Here's my 1-month alert: applications to join us in the Demography Department at UC Berkeley are due in 1 month. This is a great department in a great place with collegial people doing cool things. aprecruit.berkeley.edu/JPF05488
aprecruit.berkeley.edu
Assistant Professor - Open Field - Demography
University of California, Berkeley is hiring. Apply now!
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Alexis R. Santos @alexisrsantos.com · 15/09/2026
Work coauthored with Jeongmin Park on Demographic Aging in South Korea! Published today in The Conversation.
theconversation.com
How South Korea is tackling its super-aging problem – and what other aging nations can learn from its experience
South Korea’s unusually rapid transition to a super-aged society means it has had little time to find solutions for pension funding and healthcare for the elderly.
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Rense Nieuwenhuis @rnieuwenhuis.bsky.social · 02/09/2026
Good thing to note that social sciences are, indeed, not as simple as rocket science. Insights into China's one child policy by Susan Greenhalgh, quoted in @newyorker.com
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Casey Breen @caseybreen.bsky.social · 09/09/2026
We're hosting our 2nd annual CenSoc Users Conference on December 4th, remotely. Please consider joining us! docs.google.com/document/d/1...
docs.google.com
CenSoc Users Conference 2026
2026 CenSoc Users Conference Hosted by the CenSoc Project Organizer: Casey Breen We invite submissions for our second annual CenSoc Users Conference. The conference will be held remotely on Decem...
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Berkeley Population Sciences @berkeleypopcenter.bsky.social · 03/09/2026
Join us next Wednesday, Sept. 9 at 12pm PT for our first Brown Bag talk of the 2026-2027 academic year! Mathew Hauer (Florida State University) and Tyler McCormick (University of Washington) will discuss, "AI in Demography." Attend in-person or via Zoom. events.berkeley.edu/popsci/event...
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Alexis R. Santos @alexisrsantos.com · 20/08/2026
New article on #fertility decline in #PuertoRico suggests that the 2006 economic crisis led to accelerated decline in fertility rates. Coauthorship with @lizafuentes.bsky.social and Rahisa Delucca. #Demography www.tandfonline.com/doi/full/10....
tandfonline.com
Accelerated fertility decline following the onset of the economic crisis in Puerto Rico, 1990–2020
In 2020, the total fertility rate in Puerto Rico was estimated at 0.93 children per woman, one of the lowest in the world. While fertility decline preceded the new millennium, little is known about...
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Liza Fuentes @lizafuentes.bsky.social · 17/08/2026
New paper with @appdemography.bsky.social & Rahisa Delucca Moraleson fertility decline in Puerto Rico following economic crisis. As anxiety about declining fertility proliferates, we explore how socioeconomic instability delays parenthood. www.tandfonline.com/doi/epdf/10....
tandfonline.com
Accelerated fertility decline following the onset of the economic crisis in Puerto Rico, 1990–2020
Reader environment loaded
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APDU @apduorg.bsky.social · 08/07/2026
Congratulations to the 2026 Data Integrity Award winners - @datarescueproject.org - Gina Plata-Nino of @fracposts.bsky.social - @mapresearch.bsky.social & Williams Institute - @hudgov.bsky.social & FEMA - Disaster Recovery Data Portal Details in 🧵
static.klipy.com
Congratulations Fireworks Display
ALT: Congratulations Fireworks Display
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Catherine Rampell @crampell.bsky.social · 26/06/2026
The Trump admin wants to purge America of its undesirables. And for those Trump can’t deport, he hopes to simply hide away. On the new DOJ memo authorizing states to forcibly institutionalize more disabled Americans, rather than fund services that allow them to stay in their homes:
thebulwark.com
The Americans Trump Would Rather Not See
There are some uncomfortably eugenicist vibes in Trump’s latest disability policy, which authorizes states to institutionalize more Americans.
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Hampton Gaddy @hggaddy.bsky.social · 24/06/2026
A paper based on my master's thesis is out this morning in PDR! It offers a new way of theorising and estimating "demographic memory". In a week of heatwaves and political instability in the UK, these toy examples work as a nice graphical abstract 🌡️ onlinelibrary.wiley.com/doi/10.1111/...
Figure 2. The estimated annual level of global warming in the Northern Hemisphere from 1900 to 2025, compared to the 1861–90 average (panel a); a Lexis surface of the average memory of global warming from 1900 to 2025, in terms of average experience of warming after age 5 (panel b); population pyramids of Japan and Niger in 2025 with cohorts colored by their average memory of warming in 2025 (panel c); and the average memory of warming in Japan and Niger in 2025 across all cohorts since age 5 (panel d)Figure 3. The proportions of the life of the average British resident lived after age 18 (survivorship memory without individual-level forgetting) under the premiership of Margaret Thatcher, Theresa May, Liz Truss, a male prime minister, an unknown prime minister (from August 2029 onwards), or outside the UK
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Julia M. Rohrer @dingdingpeng.the100.ci · 19/06/2026
New paper out now! We (w/ @rmcelreath.bsky.social and @gregork.bsky.social) start from the observation that among adolescents in Leipzig, the gender gap in life satisfaction has doubled over time and ask: why?> link.springer.com/article/10.1...
Why Did the Gender Gap in Adolescent Life Satisfaction Grow? Evaluating Methodological and Demographic Explanations

The city of Leipzig in Germany conducts large-scale school surveys of adolescents in secondary schools. While in 2010 and 2015 girls were somewhat less satisfied than boys, in 2023 this gender gap had doubled. Why? When asking such a reverse causal question, answers often focus on broad narratives, such as the psychological impact of social media. Here, we illustrate how to probe alternative explanations, such as demographic changes and methodological issues. First, we rule out that the observed pattern is a simple scaling artifact. Second, we find that the widening of the gender gap is much more pronounced among students with a migration background. This could plausibly be explained by a shift in the composition of the underlying population, with a strong increase in the proportion of Syrian students, and a relative decrease of Vietnamese students. Third, part of the increasing gender gap could potentially be attributed to survey mode: In 2023, for the first time, the survey was conducted on tablets—and unexpectedly, girls (but not boys) reported significantly lower satisfaction when surveyed on tablet rather than on paper. Lastly, beyond these patterns, we still find significantly widening gender gaps in satisfaction with leisure time activities and relationships to friends. Thus, there may be a substantive increase in the gender gap in satisfaction in those two domains that is not readily attributable to changes in demographics and survey mode.

Plot showing mean life satisfaction among female and male adolescents over time. In general, boys show higher levels than girls; from 2010 to 2015 the lines for the two genders are pretty much parallel. In 2023, both boys and girls decline -- but girls much more so, effectively doubling the gender gap.
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UW-Madison Sociology @uwsoc.bsky.social · 29/05/2026
“…We demonstrate that mobile device data can detect miscarriage and replicate patterns of miscarriage risk found in high-quality Norwegian administrative data and in US clinical cohorts.” -Jenna Nobles, Lindsay Cannon, Sungsik Hwang, Shannon Malloy, Katie Noddin & Allen J. Wilcox
nature.com
Mobile device data for the study of miscarriage and its causes - npj Women's Health
npj Women's Health - Mobile device data for the study of miscarriage and its causes
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Alexis R. Santos @alexisrsantos.com · 06/05/2026
Want an overview of Demographic Aging in South Korea? Look no further! Paper lead authored by mentee Jeongmin Park and a fantastic group of South Korean colleagues! #SouthKorea #Demography #Aging #PublicPolicy academic.oup.com/gerontologis...
academic.oup.com
Aging in South Korea: the first penguin of the fastest aging nations
Jeongmin Park, MA, Meejung Chin, PhD, Kyungmin Kim, PhD, Soomi Lee, PhD, Alexis R Santos-Lozada, PhD; Aging in South Korea: the first penguin of the fastes
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Alexis R. Santos @alexisrsantos.com · 28/04/2026
New publication on the role of neighborhood length of residence and perceived neighborhood cohesion on drinking among working-age adults in the US.
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Isma Muñoz @ishmamunoz.bsky.social · 23/04/2026
New paper out in The Gerontologist on ageing and inequality in Peru! We examine how demographic change is unfolding through deeply unequal social and territorial conditions, and what this means for pensions, care, health, and social policy. Read the paper here: doi.org/10.1093/gero...
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Alexis R. Santos @alexisrsantos.com · 16/04/2026
We used a "secret shopper" method to explore access to psychiatric care in Puerto Rico 🇵🇷. By calling psychiatrists we were able to capture dynamics in access to services. Findings suggest that patients need to navigate many hurdles and wait times to secure an appointment. #mentalhealth #PuertoRico
link.springer.com
Secret Shopper Analysis Highlights that Accessing Psychiatric Healthcare in Puerto Rico is a Challenging Endeavor - Community Mental Health Journal
Community Mental Health Journal - Over the past 20 years, Puerto Rico has experienced a reduction in medical professionals and an erosion of the healthcare system. In this study, we assess the...
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Alexis R. Santos @alexisrsantos.com · 06/04/2026
I am on TikTok as alexisrsantos I will be doing clips on population health, demography and Puerto Rico. #populationhealth #demography #PuertoRico
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Alexis R. Santos @alexisrsantos.com · 26/02/2026
New paper on Latinos + Race + Political Behavior authored by Giovanni Castro!
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Alexis R. Santos @alexisrsantos.com · 28/01/2026
Universidad Autónoma de Santo Domingo has been the first place I have heard and seen Cotorras in the wild. It has been such a beautiful thing to see them fly around between 10 am to 1 pm. Cotorras are nearly extinct in Puerto Rico, so this really brought some emotions! 🦜
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Alexis R. Santos @alexisrsantos.com · 03/12/2025
Can’t believe it has been 4 months already! I’m proud to represent Penn State in the Dominican Republic and foster connections with academics here! Thanks to @ssripennstate.bsky.social for their unwavering support! #WeAre
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Elizabeth Wrigley-Field @wrigleyfield.bsky.social · 03/12/2025
For profs with a little extra research funding sitting around (and I know it’s an awful time for that), I really recommend this weekly facilitated writing group. The facilitator is excellent and it’s given me a place to work on the writing tasks I’m most resistant to (but need to do!) each week
mailchi.mp
Early bird rate for spring writing groups!
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Max Planck Institute for Demographic Research (MPIDR) @mpidr.bsky.social · 06/11/2025
Call for Papers! Submit your paper for the conference: 'Kinship Structures, Dynamics and Inequalities', taking place on 8 and 9 June 2026 @mpidr.bsky.social in Rostock organized by @demography.bsky.social, @iussp.bsky.social +coll. Deadline: 21 January 2026 www.demogr.mpg.de/go/kinship-conference
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Paul Naish @paulnaish.bsky.social · 22/10/2025
Book Review: A Little History of Mathematics Author: @snezanalawrence.bsky.social Published in Annals of Science and #FREE to read! @tandfresearch.bsky.social www.tandfonline.com/doi/full/10....
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Alexis R. Santos @alexisrsantos.com · 15/10/2025
Our article on historical demography of #PuertoRico is out! In times of economic transformations/instability, birth patterns in PR are disrupted 🇵🇷. Thanks @hathitrust.bsky.social for making these data accessible and to @pennstateuniv.bsky.social! coauthored with Wilmarí De Jesús.
tandfonline.com
Season of birth in Puerto Rico: Rethinking changes in patterns using 90 years of births occurring under US occupation
This article examines birth seasonality in Puerto Rico and explores whether patterns shift during periods of economic transformation. We compiled monthly birth counts for approximately 5.64 million...
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Qasim Rashid, Esq. @qasimrashid.com · 06/10/2025
3 MAGA extremists have re-intro'd a bill that allows South Carolina to execute women who receive an abortion. If you haven't heard about S 323, it's because corporate media has completely ignored it. Here's the overview, the sponsors, & how to fight back: www.qasimrashid.com/p/s-carolina...
qasimrashid.com
S. Carolina RE-Intros Bill To Kill Women For Getting An Abortion
Here's what's in the bill, why it is so dangerous, and the meaningful steps you can take to fight back, support women's health, and help block this bill from becoming law
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Alexis R. Santos @alexisrsantos.com · 06/10/2025
Top Feeling: a journal acceptance on Monday AM!
media.tenor.com
a yellow and black cartoon character with a pink nose and mouth
ALT: a yellow and black cartoon character with a pink nose and mouth
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Hampton Gaddy @hggaddy.bsky.social · 06/10/2025
🚨 The Economist has been telling you for years that polygamy causes civil war by locking men out of marriage. A new article with @rebeccasear.bsky.social and @anthrolog.bsky.social explains that the demography of marriage markets doesn't actually work that way. 🧵 www.pnas.org/doi/10.1073/...
pnas.org
High rates of polygyny do not lock large proportions of men out of the marriage market | PNAS
There is a widespread belief, in both the scholarly literature and the popular press, that polygyny prevents large numbers of men from marrying by ...
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Leah Abrams @leahrabrams.bsky.social · 30/09/2025
The @popassocamerica.bsky.social deadline is coming up on Sunday 📆 I welcome submissions to Session 708: Older Workers, Longer Working Lives, and Health. I look forward to reading your work in this area!
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Alexis R. Santos @alexisrsantos.com · 01/10/2025
Have they endorsed @zohrankmamdani.bsky.social? What happened to Vote Blue No Matter Who? @democrats.org
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Alexis R. Santos @alexisrsantos.com · 30/09/2025
A lot of people will need to update their slides :D
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Marti Rovira @mrovira.bsky.social · 28/08/2025
✨ Want to use quant methods to study crime, desistance and intimate partner violence? A *funded PhD* at ‪@demosocupf.bsky.social‬ is opening soon! DM if you are interested 📬
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@janprobst.bsky.social @janprobst.bsky.social · 27/08/2025
Sam the rural health advoCATe applauds this exploration of a disease with a higher rural burden. #PowerOfRuralCats jamanetwork.com/journals/jam...
jamanetwork.com
Geographic Disparities in Tobacco Treatment for COPD
This cohort study evaluates whether rural residence or physical distance to a specialty clinic are associated with the prescription of comprehensive tobacco dependence treatment among individuals with...
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𝐔𝐧𝐛𝐥𝐨𝐜𝐤𝐚𝐛𝐥𝐞 𝐆𝐨𝐮𝐫𝐦𝐚𝐧𝐝 𝐂𝐫𝐚𝐛 @johnxuandou.bsky.social · 13/08/2025
This is one of the most beautiful things I have witnessed, the craft here is impeccable.
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TizzyWoman @tizzywoman.bsky.social · 29/07/2025
Netanyahu said Monday there is "no starvation" in Gaza. Netanyahu is a war criminal. youtu.be/ejPzTSeB_OI?...
youtu.be
Netanyahu denies starvation in Gaza as images of emaciated children spark global outcry
YouTube video by CBS Evening News
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Alexis R. Santos @alexisrsantos.com · 29/07/2025
My mom has kept issues of ArcUser received in my home in Puerto Rico since Spring 2019! Wow! What do I do with them?
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Alexis R. Santos @alexisrsantos.com · 28/07/2025
Our work on Demographic Aging in Ecuador has been published ahead of print in #TheGerontologist academic.oup.com/gerontologis...
academic.oup.com
Demographic Shifts and Aging in the Middle of the World: Health Challenges and Policy Opportunities in Ecuador
Abstract. Ecuador is a middle-income country in South America with approximately 18 million residents. While still young, the country is undergoing a demog
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Bruce Desmarais @brucedesmarais.bsky.social · 24/07/2025
I’m thrilled to share new work out in Social Networks! In this project, randomly allocating students to teams permitted identifying causal effects of co-membership. Thanks to Sarah Gordon, Wayne Baker, Jose Uribe, and Cassandra Chambers for bringing me on! Ful article: 📄 lnkd.in/e9TyvnRX
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Jen @jdloverr63.bsky.social · 19/07/2025
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Alexis R. Santos @alexisrsantos.com · 13/07/2025
My student has worked so hard. He just turned in his final dissertation chapter draft …. It is so good! … I AM CERTAINLY NOT EMOTIONAL RIGHT NOW …
media.tenor.com
a cartoon horse is screaming with its mouth wide open in the desert .
ALT: a cartoon horse is screaming with its mouth wide open in the desert .
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Alexis R. Santos @alexisrsantos.com · 06/07/2025
I hate that my friend moved from Los Angeles to Chicago! I used to be able to call him at EST Midnight and talk for an hour. He should go back to Los Angeles as it is move convenient for me.
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Alexis R. Santos @alexisrsantos.com · 04/07/2025
Time for some good old phrenology!
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Alexis R. Santos @alexisrsantos.com · 04/07/2025
Anybody with a Kindergarten diploma could have told him this.
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Alexis R. Santos @alexisrsantos.com · 28/06/2025
Fetterman is probably one of the worse disappointments we’ve had as voters in PA. Voted for a so called “liberal” and turns out he is OK with a bunch of Trump agenda. For shame, @fetterman.senate.gov …
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Alexis R. Santos @alexisrsantos.com · 27/06/2025
Free Markets have failed the people 100% of the time. Yet, we always justify such failures. Why not try a new way?
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Alexis R. Santos @alexisrsantos.com · 22/06/2025
Very appropriate today.
media.tenor.com
a woman in a space suit says i repeat we have no
ALT: a woman in a space suit says i repeat we have no
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Alexis R. Santos @alexisrsantos.com · 21/06/2025
I’m attending a social function of the Central Pennsylvania Nobility. 😱 Which fork do I use for soup?
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Alexis R. Santos @alexisrsantos.com · 20/06/2025
It takes the right set of circumstances! I have been working with Wilmarí De Jesús (Visiting Scholar from Puerto Rico) and in 2.5 weeks we’ve compiled a dataset that includes 90 years + of data, written a full manuscript and drafted another! 🤩
media.tenor.com
snoopy is typing on a typewriter while sitting on a bed
ALT: snoopy is typing on a typewriter while sitting on a bed
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