All NewsJune 01, 2014
- 5th Annual IGSS Conference
With support from the Eunice Kennedy Shriver National Institute of Child Health & Human Development, the Office of Behavioral and Social Sciences Research, and the Population Association of America, the Institute of Behavioral Science and the NIH/NICHD supported University of Colorado Population Center are hosting the 5th annual conference entitled Integrating Genetics and the Social Sciences. The goal of this conference is to showcase behavioral and molecular genetic studies that enhance demographic and social scientific inquiry. The two day conference will include a 4 hour advanced statistical genetics workshop. Researchers from any of the biological or social sciences are encouraged to participate.
Information about the conference can be found here
. To be considered for this conference, please submit a complete paper, a working draft, or an extended abstract (including data description, methods, and preliminary
results) as a .pdf file to this link
by June 1st, 2014. February 15, 2014
- Sixth Annual Award Competition for Research Using the IPUMS Microdata Collection
Papers or publications submitted should utilize IPUMS-USA, IPUMS-CPS, IPUMS-International or IHIS data to study social, economic, and/or demographic processes. Please submit your work here
. January 17, 2014
- America’s white-collar Congress
Matthew Wolfson states his concerns about nation's economic inequality. However Nicholas Carnes
, a professor of public policy at Duke University, believes that the problem is coming from the people making policy all come from a particular class. In this article, the interview between Wolfson and Carnes points Carnes' ideas about the impact of social class in policymaking. The Boston Globe ArticleJanuary 15, 2014
- Call for Papers and Applications: Perspectives on Time Use in the U.S. Conference and Workshop, June 23-27, 2014
The deadline for submission of paper abstracts is January 15, 2014. Authors chosen to present papers will be notified by February 14, 2014. The deadline for submission of applications to the Workshop is March 1, 2014 and workshop applicants will be notified by March 15. Detailed information is contained in the call for papers and call for applications documents, which you can access using this link
. For more information, contact Sandra Hofferth
, University of Maryland. January 13, 2014
- Proposal Plagiarism
Investigators at the National Science Foundation (NSF) turned up nearly 100 cases of suspected plagiarism in proposals funded by the agency during the fiscal year 2011, all of which are now being investigated. The NSF’s Office of Inspector General (IG), an internal but independent watchdog, used plagiarism detection software to analyze some 8,000 successful funding applications, and flagged 1 to 1.5 percent of cases as suspicious—though it’s not clear what percentage of these are self-plagiarism, in which researchers lift sections from the materials and methods or even introductions of their own previous proposals. Please be careful and not plagiarize in your proposals. January 07, 2014
- Unplanned Pregnancies Don’t Necessarily Mean Marriage AnymoreChristina Gibson-Davis
, a sociology professor at Duke University, agrees with Hope Yen that there is no need for a marriage after unplanned pregnancies, although the two-parent family idea is still valued. Hope Yen discusses that the number of the marriages due to the unplanned pregnancies have declined. Associated PressJanuary 07, 2014
- Millionaires Run our Government. Here’s Why That Matters.Nicholas Carnes
, an Assistant Professor of Public Policy at the Sanford School of Public Policy at Duke University and the Co-Director of the Research Triangle chapter of the Scholars Strategy Network, explains why millionaires should run the government. He argues the class in legislatures and believes that it matter when we are governed by former investment bankers or former blue-collar workers. Washington Post ArticleJanuary 03, 2014
- Mistake to Focus on Border SecurityJacob Vigdor
, an adjunct fellow at the Manhattan Institute and professor of public policy at Duke University, argues the immigration reform and how the laws will be changed one step at a time. In order to support the immigration reform, he expresses that the number of Mexican-born US citizens has decreased and according to the World Bank Mexico's population rate will be lower than it was before. Along with that, he supports that today's immigrants are better educated. The Hill ArticleDecember 08, 2013
- How a Federal Job Program Would Fix EconomyWilliam Darity Jr.
, arts and sciences professor of public policy, African and African-American studies and economics and the director of the Research Network on Racial and Ethnic Inequality at Duke University, talks about that Barack Obama wants to raise the minimum wage to fix persistent problems in the economy by creating a federal job guarantee for all citizens. News ObserverDecember 04, 2013
- Federal Law Requires Job CreationWilliam Darity Jr.
, arts and sciences professor of public policy, African and African-American studies and economics and the director of the Research Network on Racial and Ethnic Inequality at Duke University, states that if US citizen workers are not subjected to low wages, then the US has to comply with the terms of the 1978 Humphrey-Hawkins Act, mandating that if the private sector does not create full employment, the public sector will provide the missing jobs. New York TimesDecember 03, 2013
- Call for Papers: Cohort Studies Working Group
The National Bureau of Economic Research (NBER) will hold a meeting of the Cohort Studies Working Group on Friday, April 4, 2014 in Los Angeles, CA. If you are interested in presenting a paper please email an abstract to Dora Costa
by Dec 3, 2013. November 30, 2013
- The Civil War’s African American Women Refugees
Duke University history professor Thavolia Glymph talks about what happened to former slave women upon escape or emancipation from their former owners over the course of the war. Though their experiences were marked by perpetual transience, Ms. Glymph explains, these women formed new bonds of friendship and support during a turbulent time when many of them were separated from their families and established networks. Wake Forest University in Winston-Salem, North Carolina hosted this event. C-Span ArticleOctober 28, 2013
- U.S. Census Data May Undercount Mexicans, Arabs, Others
Jen'an Ghazal Read, Associate Professor of Sociology, writes in Population Research and Policy Review that the number of Mexican-Americans known to be legally in the U.S. would increase nearly 10 percent if the federal census broadened its standard definition. Read the press release here
. October 23, 2013
- What is going on at NIH now that the shutdown has ended?
Guidance on Resumption of NIH Extramural Activities Following the Recent Lapse in Appropriations(NOT-OD-14-003
) Office of the Director, NIH. This is the latest news we have about operations at NIH after the shutdown. The following topics are covered:
October 22, 2013
- eRA Systems Availability,
- Rescheduling October Application Due Dates,
- Processing of Applications Submitted During the Shutdown,
- Replacing an Application that was Submitted for an October Due Date,
- Rescheduling Peer Review Meetings,
- Opportunity to “Refresh” Applications that are Reassigned to May 2014 Council,
- Early Stage Investigator Eligibility,
- K99/R00 Eligibility, Payment Management System,
- Award Actions, Financial Operations under a Continuing Resolution.
- DuPRI Economist Offers a Family “Trickle Down” Theory
V. Joseph Hotz argues in the online magazine Slate that birth order influences achievement in life because parents target first-borns for discipline to establish their reputation for toughness and hope the message trickles down to the other kids. Based on a working paper written with Washington University colleague Juan Pantano, the theory received wide media coverage by PBS Newshour, NPR’s Marketplace, The Atlantic, MSNBC and others. Slate Op-Ed
, PBS Newshour
, NBER Working paper no. 19542
, V. Joseph Hotz July 11, 2013
- BBCNews.com Features DuPRI Aging Research
Kaare Christensen, research scientist with the DuPRI Center for Population Health and Aging, is featured by BBCNews.com for his comparison of Danish nonagenarians born a decade apart. The study, published in The Lancet, found significantly better cognitive function and activities of daily living in the later cohort, suggesting that a larger proportion of people are living to older ages in better overall health than in the past. BBC News story
| The Lancet article
| Kaare ChristensenJuly 03, 2013
- Public Radio Talks About Values
Scott Huettel, professor of psychology and neuroscience, talked to WUNC public radio about his latest publication in the Journal of Neuroscience describing how the brain assigns value to things and how that understanding can lead to better decisionmaking. WUNC.org story
| Journal of Neuroscience article
| Duke Today announcementJuly 02, 2013
- Immigrant Assimilation and Public Policy: Immigrant Roots, but Made in America
Jacob Vigdor, Sanford School of Public Policy professor, discusses immigrant integration with the Christian Science Monitor newspaper and others. His “assimilation index,” described in a March report for the Manhattan Institute, reviews recent trends in immigration to the U.S. and gauges the degree to which immigrants are assimilated into U.S. society compared with the past. Christian Science Monitor Article
| Manhattan Institute Report
| Sanford School of Public Policy AnnouncementJune 28, 2013
- A Test for Asthma Risk?
Dan Belsky, a DuPRI postdoctoral fellow, led a study of asthma risk featured by Medical News Today and published in The Lancet Respiratory Medicine journal. Using data from the longitudinal Dunedin Multidisciplinary Health and Development Study, Belsky and his colleagues - including DuPRI’s Avshalom Caspi, Terrie Moffit and Karen Sugden - linked purported asthma-risk genes to real-life outcomes in more than 800 Dunedin study participants, demonstrating that the genotypes could be used to predict a child’s risk of developing asthma better than family history alone and early enough to take preventive measures. Medical News Today Story
| The Lancet Respiratory Medicine Article
| Duke Today AnnouncementJune 13, 2013
- DuPRI Graduate Trainee Wins Research Award
Ryan Brown, an economics doctoral candidate in DuPRI’s National Institute on Aging-funded training program, has received the Minnesota Population Center’s 2012 IPUMS-USA Research Award for the best published or unpublished work by a graduate student. Read Full Article HereMay 01, 2013
- Millionaire Politicians and Farmers Featured
Nicholas Carnes, Sanford School of Public Policy assistant professor, provoked discussions by American Public Media’s “Marketplace” and others in May and June with his “thought experiment” on the prospect of a millionaires’ political party. In early July, a paper by Carnes on farm subsidies also garnered coverage by the Toronto Globe and Mail and Washington Post. Marketplace Article
| Washington Post Workblog Article
| Munich Personal RePEc Archive PaperApril 01, 2013
- Inequalities in the Housing Market Make News
Patrick Bayer, Duke economics chair and professor, was featured by Chicago Magazine and other outlets for his working paper showing that blacks and Hispanics may pay thousands of dollars more than white buyers for comparable houses, and the differential is highest in Cook County Illinois. Bayer told the magazine that one reason for the racial differences is probably that minorities have lower home ownership rates, and are therefore more likely to be first-time home buyers with less experience negotiating the asking price of a house. ChicagoMag.com Story
| Working Paper
| Duke Today AnnouncementMarch 01, 2013
- 4th Annual IGSS Conference, Boulder, CO, October 10-12, 2013
With support from the Eunice Kennedy Shriver National Institute of Child Health & Human Development and the Population Association of America, the Institute of Behavioral Science and University of Colorado Population Center are hosting the 4th annual Integrating Genetics and the Social Sciences Conference. The goal of this conference is to showcase behavioral and molecular genetic studies that enhance demographic and social scientific inquiry. Researchers from any of the biological or social sciences are encouraged to participate. Information about the conference can be found here
. To be considered for this conference, please submit a complete paper, a working draft, or an extended abstract (including data description, methods, and preliminary results) as a .pdf file here
by June 1st, 2013. For more information, contact Jason Boardman at firstname.lastname@example.orgFebruary 11, 2013
- Call for Abstracts: 2013 International Conference on Family Planning
The International Conference on Family Planning organizers invite abstracts on cutting edge research and program results directed at enabling individuals in the world, especially in low-income areas, to achieve their contraceptive and reproductive intentions. Of particular interest are abstracts on research demonstrating how family planning benefits and advances the health and wealth of people and nations and on high impact or best practices of family planning programs and service delivery models. Abstracts using strong scientific/evaluation methods will be given priority in the review and acceptance process.
Pre-formed panels may be submitted for review. These will include no more than four (4) abstracts, thematically integrated with each abstract based on work carried out by separate organizations.
To submit abstracts please visit the 2013 International Conference on Family Planning website
. September 19, 2012
- Call for Papers: Alpine Population Conference, Aosta Valley, Italy
Alp-Pop brings together scholars interested in population issues across several disciplines, among them demography, economics, and sociology. The conference emphasizes empirical rigor and innovation over a given topic or geographical area, and meets the challenges of interdisciplinary and international audiences. Submissions are particularly welcome on topics concerning: population, families, and the welfare state; population and economic development/institutions; finance and population issues.
Alp-Pop scholars confer both formally and informally. A traditional conference program (paper and poster presentations)
mixes with group activities in a world-class winter resort. The conference location, the Planibel Hotel, is located on the well-known ski slopes of La Thuile. Read the full announcementSeptember 11, 2012
- DuPRI Faculty Spotlight: Jenny Tung, PhD.
"Monkeys don't smoke, and they don't do yoga," says Jenny Tung. But monkeys do experience the kind of psychosocial stress that can drive humans to embrace both of those coping mechanisms. Read the full article here
. September 06, 2012
- DuPRI Faculty Awarded $2.8 Million to Study Gene Effects of Stress
Jenny Tung, Faculty Associate at DuPRI and an Assistant Professor in the Department of Evolutionary Anthropology, has been awarded a five-year R01 grant from the National Institute of General Medical Sciences totaling $2.8 million. Read the full articleAugust 27, 2012
- Call for Papers: PAA 2013 Annual Meeting
The Call for Papers for the PAA 2013 Annual meeting has been finalized. A PDF version and other instructions can be found at http://paa2013.princeton.edu
in the "Reference Documents" section. To see the sessions organized by topics please click on the Sessions by Topic link on the toolbar.
The website is now ready to accept submissions of papers and posters for the annual meeting. If you are new to the process, please read the detailed instructions in the first page of the Call for Papers PDF
. Submissions can be made online until September 21, 2012. For the full announcement, visit the PAA 2013 Annual Meeting Program
. August 17, 2012
- Call for Papers: 27th International Population Conference
The Call for Papers for the 27th International Population Conference to be held in Busan, Korea on August 26-31, 2013 went out by mail to all IUSSP members in May. If you did not get your copy in the mail you can consult the Call for Papers on the Conference website
You can also download the full list of sessions with sessions cross-listed in more than one theme, so even if you do have a copy of the call for papers you may want to check the list with cross-listed sessions. The Conference website will also display information on registration, side meetings, exhibit space, and travel to Korea. Please check the website regularly for new information.
Please note that for the 2013 conference extended abstracts (2-4 pages) are mandatory and should include sufficient information for the organizer to judge the merits of the submission including description of topic, theoretical focus, data and research methods, and expected findings. The deadline to submit abstracts is October 15, 2012. Click for more info
. August 10, 2012
- International Conference on Methods for Surveying and Enumerating Hard to Reach Populations
"H2R 2012" will be held Oct. 31 to Nov. 3 in New Orleans, LA. The conference will bring together survey methodologists, sociologists, statisticians, demographers, ethnographers, policy analysts and other professionals from around the world to present new and innovative concepts and techniques for surveying hard to reach populations. DuPRI faculty members M. Giovanna Merli and James Moody will both be presenting papers. The conference aims to address both the statistical and survey design aspects of including hard to reach groups. Researchers will report findings from censuses and surveys and other research related to the identification, definition, measurement, and methodologies for surveying and enumerating undercounted populations. The deadline for registration is Sept. 20. H2R 2012 Homepage
| Registration FormJuly 09, 2012
- Supercentenarian Researchers Meet in Rome
Over two full and lively days, researchers from Europe, Scandinavia, the U.S., Canada, Japan and Brazil presented their latest data and analyses of the phenomenon of "supercentenarians" — people who reach the age of 110 or more. Read the full articleMay 08, 2012
- Anatoliy Yashin Receives Sheps Award for Mathematical Demography
Anatoliy I. Yashin, Scientific Director of the DuPRI Center for Population Health and Aging, received the Mindel C. Sheps Award in San Francisco for his contributions to the methodological foundations of demography. Read the full articleMay 08, 2012
- DuPRI Faculty Spotlight: Anatoliy I. Yashin, PhD.
Whether the secret to long life turns out to be a positive attitude, lucky genes, or highly complex interactions among a multitude of factors over a lifetime, Anatoliy I. Yashin will likely capture those forces at work in a sophisticated mathematical model.
Yashin, the scientific director of DuPRI’s Center for Population Health and Aging, applies advanced mathematics to understanding the complexities of human aging. The new methods and models he has devised, and the results they generate, continually influence the course of research in the field of aging studies. Read the full article here
. April 30, 2012
- PAA 2012: DuPRI Students, Faculty Highlighted at Duke Economics
Five economics Ph.D. students head to the Population Association of America (PAA) Annual Meeting this week. The conference will be held May 3 - 5 in the heart of San Francisco. These students join Duke Population Research Institute (DUPRI) faculty who continue to represent Duke at the PAA meeting year after year. Duke Economics Professors Seth Sanders and Duncan Thomas will be in attendance this week. Read the full article. March 01, 2012
- DuPRI Faculty Spotlight: M. Giovanna Merli, Ph.D.
In a recent interview, DuPRI Associate Director M. Giovanna Merli explains how she blends classical demographic methods with tools like social network modeling to challenge assumptions about the world’s most populous country. Read the full article here
. February 13, 2012
- PAA 2012 Annual Meeting
This year's Population Association of America (PAA) Annual Meeting is taking place in San Francisco on May 3-5. Are you a DuPRI student that is interested in attending? Let us help! Conference DetailsJanuary 19, 2012
- 7th Annual AIDS and Economics Pre-Conference
This call is open to individuals who are conducting research on the issue of HIV/AIDS and economics. Typical topics in past Pre-Conferences have included HIV costing, cost-effectiveness analysis, resource allocation and expenditure tracking, AIDS and the workplace, AIDS and the private sector, economics and behavior change, and socio-economic impact assessments.
In addition to individual submissions, groups who would like to propose a panel on one particular topic may do so by proposing presenters and abstracts as a group. The panel should not comprise more than four abstracts. Reviewers reserve the option of selecting a panel to present, selecting individual abstracts within a panel or rejecting all abstracts within a proposed panel.
Click for more infoJanuary 11, 2012
- APHA Call for Abstracts
The American Public Health Association is now accepting abstracts for the 140th APHA Annual Meeting. The theme of the meeting is: Prevention and Wellness Across the Lifespan.
Click for more info. October 04, 2011
- New DuPRI Training Website Launches
For students who wish to learn more about Training in the Population Sciences at Duke, DuPRI has launched a comprehensive Training website. The site aims to answer any questions prospective students may have regarding courses, grant funding, and conference attendance. Training LinkAugust 23, 2011
- Population in focus at Science
A recent issue of the popular journal Science
examines the opportunities and challenges created by demographic changes around the world. News stories by the journal's staff and research assessments by leading experts- accompanied by online videos and dynamic graphics- explore the past, present and future trajectory of the world's population. More InfoJuly 27, 2011
- DuPRI's Anatoli Yashin among those skeptical on retracted paper's findings
A prominent paper originally published in Science
on the genetics of longevity in centenarians has recently been retracted. Research professor and DuPRI Associate Anatoli Yashin was skeptical from the start. "I didn't believe it," he says. "Any model that plans to predict lifespan based only on genetic components is not quite correct. The environmental contribution to longevity is huge." Read the entire article here
. July 15, 2011
- Population Reference Bureau Reviews May's Biodemography Conference at Duke
With support from the U.S. National Institute on Aging, a group of U.S. and European scientists met in May at Duke's Population Research Institute to share findings from their ongoing work. The eventual goal is to identify interventions—public health policies, medical treatments, behavior advice—that prolong survival so more people lead longer, healthier lives.
Full articleJuly 13, 2011
- More on US Life Expectancy: James Vaupel on Obesity vs. Longevity
America's obesity epidemic is so called for a reason. Roughly one in three adults is obese, yet Americans are living longer than ever. In a June 30 article featured in The Economist, DuPRI professor and founding director James Vaupel expresses cautious optimism on rising obesity rates in the US having a negative impact on future progress in life expectancy. Read the entire article here
. July 13, 2011
- DuPRI Awarded T32 Grant
The Duke Population Research Institute (DuPRI) is pleased to announce that it has been awarded a T32 training grant from the National Institute of Aging at the National Institutes of Health. The grant will provide funding for five graduate students and two post-doctoral students who wish to engage in rigorous training in the general fields of social, medical, and economic demography of aging. MORE INFOJuly 12, 2011
- CPHA Senior Investigator Weighs in on US Life Expectancy
A recent article posted by BBC News examines the widening gap in life expectancy rates between the US and other Western countries. Risk factors such as obesity, high blood pressure and tobacco use have been linked to a slowed increase towards longevity in Americans when compared to that of Britons or Canadians. "When you look at life expectancy at 65 or 75, the US performs rather well" says Duke researcher Svetlana Ukraintseva. Where the US lags behind is what happens at a much younger age. Full StoryJune 01, 2011
- DuPRI Professor brings a collaborative spirit to the science of Ethnography
James B. Duke Professor of Sociology Linda M. Burton studies Americans “who don’t have a voice, who are under the radar of our society.” Burton directed the ethnographic component of the monumental Welfare, Children, and Families: A Three-City Study
, managing a team of 215 research scientists, ethnographers, data analysts and staff. Full StoryMay 05, 2011
- DuPRI Faculty Awarded Grant to Improve the Utility of Respondent Driven Sampling
M. Giovanna Merli, Associate Professor of Public Policy at the Sanford School of Public Policy, has been awarded a four-year R01 grant from the National Institutes of Health’s Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD). Totaling $1,067,457 over four years, this grant addresses efforts to obtain valid estimates of the prevalence of sexually transmitted disease infection and risky and preventive health behaviors among female sex workers in China, with possible extensions to other hidden populations in different contexts. Merli and her research team, which includes Jim Moody of the Duke Department of Sociology, will work to improve the utility of Respondent Driven Sampling (RDS), an increasingly popular sampling method used to recruit samples of hidden populations, with data collected in China as part of various collaborative efforts with Ersheng Gao of Shanghai Fudan University, Sharon Weir and Gail Henderson of the Carolina Population Center and Xiangsheng Chen of Nanjing National Center for STD Control. Dr Merli is the Associate Director of DuPRI and directs the institute’s Developmental Core, and is also a member of the Duke Global Health Institute. View AbstractApril 18, 2011
- Call for Papers: 20th Bureau for Research and Economic Analysis of Development (BREAD) Conference
The Centre for Economic Policy Research (CEPR), the Bureau for Research and Economic
Analysis of Development (BREAD) and the Actors, Markets, and Institutions in Developing Countries: A micro-empirical approach (AMID), Marie Curie Initial Training Network are joining forces this year to host a Development Economics Conference at the Paris School of Economics
on Friday 23 and Saturday 24 September, 2011. This meeting is at the same time the annual symposium of the CEPR Development Economics Programme, the Twentieth BREAD
Development Economics Conference and AMID Third Network Annual Conference. Financial
support for the conference is provided by CEPR, BREAD and AMID.
We now invite submissions for the CEPR/BREAD/AMID conference from interested researchers on any topics within the area of Development Economics. Only full-length papers will be considered.
The deadline for replies is 18:00 GMT on Friday June 17, 2011. To respond to this Call, please email your paper to Nadine Clarke
, CEPR Meetings Manager, and indicate to her whether you would like to attend the conference. Click for More InfoApril 05, 2011
- International AIDS Economics Network (IAEN) online forum – join the dialogue!
The International AIDS Economics Network (IAEN) is an organization founded in 1993, with the objective of encouraging economists and policymakers to discuss issues of AIDS and economics. IAEN will be holding an online discussion forum on Efficiency and Effectiveness in the context of HIV and AIDS in April and May. Experts from a variety of organizations and disciplines will be posting short discussion pieces on various aspects of this topic. This forum is designed to encourage online discussion among members, and IAS members are also invited to join the dialogue. There will be the opportunity to read the discussion papers by leaders in this field, as well as to share experiences and opinions with others. In order to receive updates, and join the discussion, please go to the website and enter your name and email address.
More InfoNovember 04, 2010
- Can the Census Accurately Count Same-Sex Couples?
DuPRI Director, Seth Sanders works with other research professors on the topic of gay and lesbian couples living in committed relationships across the country had two options when filling out the 2010 Census: “husband/wife” or “unmarried partner.” Their decisions on which box to check could have serious policy implications.
Full StoryOctober 28, 2010
- DuPRI Can Help with Grant Process
DuPRI offers assistance to faculty associates and affiliates through all stages of the grants process: from proposal development and submission, through research administration responsibilities, to close out activities.
For more information or assistance, please contact the Grants staff at email@example.com Read MoreOctober 26, 2010
- Married With Degrees
All two-career couples face concerns, but when each spouse is an academic, there are particular problems to resolve. They can range from finding jobs at the same or nearby institution to conducting joint research. It's a common issue for universities. One recent book reported that 40 percent of female faculty and 35 percent of male faculty have partners who are also faculty members.
Full StoryJanuary 05, 2010
- James Vaupel: an innovator in the demography of aging
James W Vaupel's career has always been about transcending the limits of his field, demography. As the founding Director of the Max Planck Institute for Demographic Research in Rostock, Germany, Vaupel has helped to revolutionize the statistically bound field by taking a multidisciplinary approach that incorporates both human and non-human biology, mathematics, genetics, and public policy. His findings, which have often provoked debate, have changed perceptions about the demography of aging. Lancet Article