Health and the Environment
Paragraphs

It is widely recognized that an “African green revolution” will require greater use of inorganic fertilizers. Often-made comparisons note that fertilizer use rates in Africa are just 10–20% of those in Asia, Europe and the Americas. Most attempts to explain relatively low-adoption of fertilizer assume yield responses to inorganic fertilization warrant higher application rates and hypothesize that observed use rates are limited by market-based factors. Another explanation may be that application rates are low because African yields are less responsive to inorganic fertilizer than yields in other regions, and less responsive than analysts perceive. Examining the case of Zambia, we evaluate whether yield response to fertilizers could explain adoption and application rates. A model of yield response is constructed and a combination of estimators is employed to mitigate potential biases related to correlation between fertilizer use and unobserved heterogeneity as well as stochastic shocks. Results indicate higher fertilization rates would be marginally profitable or unprofitable in many cases given commercial fertilizer and maize prices. Phosphoric fertilizer is particularly unprofitable on acidic soils, which are common in Zambia and other areas of sub-Saharan Africa. We propose feasible recommendations for diversifying the current government strategy to enhance crop productivity.

All Publications button
1
Publication Type
Journal Articles
Publication Date
Journal Publisher
Agricultural Economics
Authors
News Type
News
Date
Paragraphs
This Global Food Security Strategy presents an integrated whole-of-government strategy and agency-specific implementation plans as required by the Global Food Security Act of 2016 (GFSA).

"Right now, the world is closer than ever before to ending global hunger, undernutrition, and extreme poverty, but significant challenges and opportunities remain, including urbanization, gender inequality, instability and conflict, the effects of a changing climate, and environmental degradation. Despite our collective progress in global food security and nutrition over recent years, a projected 702 million people still live in extreme poverty, nearly 800 million people around the world are chronically undernourished, and 159 million children under five are stunted. Food security is not just an economic and humanitarian issue; it is also a matter of security, as growing concentrations of poverty and hunger leave countries and communities vulnerable to increased instability, conflict, and violence." From the USAID Oct. 3 release.  

You can read more and download the pdf of the Global Food Security Strategy at the USAID website

Hero Image
food strategy 0
All News button
1
-

Abstract: Over the past decade, the proven ability to produce large quantities of natural gas from organic-rich shale formations in North America has shown the potential to change the energy picture in many parts of the world. Over the past five years there have been discoveries of large natural gas fields in the eastern Mediterranean and off the east coast of Africa.  These enormous resources have the potential to dramatically change the global energy system – for better, or for worse. In this talk I will discuss steps that can be taken to assure that natural gas resources are developed in an optimally efficient and environmentally responsible manner. Responsible development of shale gas resources using horizontal drilling and multi-stage hydraulic fracturing has the potential to substantially reduce greenhouse gas emissions and, in the near term, significantly reduce air pollution in many cities in the developing world. I will discuss several on-going research projects investigating the wide variety of factors affecting successful gas production from these extremely low permeability formations and procedures for managing the risks of earthquakes triggered by injection of hydraulic fracturing waste water.

About the Speaker: Dr. Mark D. Zoback is the Benjamin M. Page Professor of Geophysics at Stanford University and Director of the Stanford Natural Gas Initiative.  Dr. Zoback conducts research on in situ stress, fault mechanics, and reservoir geomechanics with an emphasis on shale gas, tight gas and tight oil production.  He currently directs the Stanford Natural Gas Initiative and is co-director of the Stanford Center on Induced and Triggered Seismicity. He is the author of a textbook entitled Reservoir Geomechanics published in 2007 by Cambridge University Press and the author/co-author of over 300 technical papers. Dr. Zoback was the founder of GeoMechanics International, a software and consulting company that was acquired by Baker Hughes in 2008. Dr. Zoback has received a number of awards and honors, including the 2006 Emil Wiechert Medal of the German Geophysical Society and the 2008 Walter H. Bucher Medal of the American Geophysical Union.  In 2011, he was elected to the U.S. National Academy of Engineering and in 2012 elected to Honorary Membership in the Society of Exploration Geophysicists.  He is the 2013 recipient of the Louis Néel Medal of the European Geosciences Union and named an Einstein Chair Professor of the Chinese Academy of Sciences. In 2015 he received the Robert R. Berg Outstanding Research Award of the AAPG 2016 received the American Geosciences Institute Award for Outstanding Contribution to Public Understanding of Geosciences. He served on the National Academy of Engineering committee investigating the Deepwater Horizon accident and the Secretary of Energy’s committee on shale gas development and environmental protection. He also advised a Canadian Council of Academies panel investigating the same topic and served on the National Academy of Sciences Advisory Board on drilling in the Gulf of Mexico.

Encina Hall, 2nd floor

Mark Zoback Professor of Geophysics Stanford University
Seminars
Paragraphs
In 2007, "solar market gardens" were installed in 2 villages for women’s agricultural groups as a strategy for enhancing food and nutrition security. Data were collected through interviews at installation and 1 year later from all women’s group households (30–35 women/group) and from a random representative sample of 30 households in each village, for both treatment and matched-pair comparison villages. Comparison of baseline and endline data indicated increases in the variety of fruits and vegetables produced and consumed by SMG women’s groups compared to other groups. The proportion of SMG women’s group households engaged in vegetable and fruit production significantly increased by 26% and 55%, respectively (P < .05). After controlling for baseline values, SMG women’s groups were 3 times more likely to increase their fruit and vegetable consumption compared with comparison non-women’s groups (P < .05). In addition, the percentage change in corn, sorghum, beans, oil, rice and fish purchased was significantly greater in the SMG women’s groups compared to other groups. At endline, 57% of the women used their additional income on food, 54% on health care, and 25% on education. Solar Market Gardens have the potential to improve household nutritional status through direct consumption and increased income to make economic decisions.
All Publications button
1
Publication Type
Journal Articles
Publication Date
Journal Publisher
Food and Nutrition Bulletin
Authors
Rosamond L. Naylor
Encina Hall616 Serra StreetStanford, CA 94305-6055
0
zaira.jpg

Zaira Razu is a research Associate and Project Manager at the Program on Poverty and Governance at CDDRL. She is currently working on the Governance of Public Health in Mexico project, focusing on the differences in mortality rates across income groups to analyze health disparities in the country. She is also collaborating in the design of impact and process evaluations of different interventions that seek to reduce youth violence in Mexico and the US, as well as to better understand the key dimensions of youth criminal careers: recruitment, incentives, training, and desistance. Zaira’s previous responsibilities at PovGov included a review on the current state of Political Economy scholarship in Mexico and the creation of a database of Oaxaca municipalities to analyze the relationship between community participation and the quality of public goods provision.

Zaira graduated from Stanford in June 2014 with an MA in International Policy Studies, concentrating in Democracy, Development, and the Rule of Law. She also holds a BA in Political Science from Instituto Tecnológico Autónomo de Mexico (ITAM). Zaira is interested in applied research on youth, health, and poverty alleviation policies. She has experience in impact evaluation (at the Inter-American Development Bank), and in policy design and implementation (at Fundación IDEA and in the Center Mario Molina, Mexico).

 

Publications

Díaz- Cayeros, A., & Razú, Z. (2014). ¿ Hacia dónde va la economía política en México?. El Trimestre Económico81(324), 783-806.

 

Project Manager and Research Assistant, Governance of Public Health in Mexico Project
-

Abstract: Concerns are mounting that changes in climate, land use, species invasions, and connectivity are changing the global landscape of infectious diseases. Ecological complexity makes these anthropogenic effects on infectious disease difficult to predict. Using data-driven mathematical models, I will show how mosquito-transmitted diseases such as malaria, dengue, and chikungunya may shift with changing climate. I will then discuss sources of uncertainty and how ecological understanding can help to mitigate future shifts in disease risk. Finally, I will introduce the new Center for Disease Ecology, Health, and Development based at Stanford University, which will work to improve human health and well-being through ecological solutions to infectious disease.

About the Speaker: Erin Mordecai has been an Assistant Professor in Biology at Stanford University since January 2015. Her research focuses on the ecology and evolution of infectious diseases in humans and natural systems, and in particular how infectious diseases respond to global change. She graduated from the University of Georgia in 2007 and received her PhD at the University of California Santa Barbara in 2012. She then completed an NSF Postdoctoral Research Fellowship in Biology at the University of North Carolina at Chapel Hill and North Carolina State University. 

Encina Hall

616 Serra Street

Stanford University

Erin Mordecai Assistant Professor in Biology Stanford University
Seminars
Authors
News Type
News
Date
Paragraphs

For Matthew Kohrman and his students, the war against tobacco needs a new communications strategy.

After all, he noted, three times as many cigarettes are currently manufactured and sold worldwide than were in the 1960s. And the global cigarette industry is the greatest cause of preventable death on the planet today.

That’s why the Stanford associate professor of anthropology decided to teach an introductory seminar this spring, Anthro 182N, titled Smoke and Mirrors in Global Health. Kohrman led his 10 students on a journey into the “strange optics” that the global tobacco industry uses – and what to do about them.

As noted in the syllabus, “entrenched challenges” to global health require society to develop “new methods” to communicate the real truth about tobacco.

Just what are those “new methods?” At the culmination of the class, the students presented some variations on that theme. Their end-of-the-quarter projects were web-based efforts profiling various features of global tobacco. They included exposés on how academicians in China assist the industry in that country, humorous parodies and critiques of Philip Morris, and flawed approaches to tobacco control in South Korea.

They tackled big-picture questions, Kohrman said. For example, they asked what exactly constitutes cigarette manufacturing and how new strategies could help slow the spread of tobacco-related diseases worldwide.

Kohrman, the director of Stanford’s Cigarette Citadels project, envisioned his class as a way for students to offer some thought-provoking and original ideas grounded in solid data. After viewing the student projects, he was astounded – and proud.

“My overall impression has been a feeling of awe,” he said. “Mostly freshmen and sophomores, the students who enrolled in this new course quickly synthesized complex intellectual concepts introduced early in the quarter, conceived their own innovative project ideas, collected relevant data, generously worked with each other, designed apt strategies for evocatively visualizing their messages, and chose and implemented strong interactive media tools – most of which were utterly new to me.”

One of those students was Minkee Sohn, a communication major, who created a video, “Fresh Recruits,” to highlight what he believes is the hypocrisy in the language of some cigarette manufacturers’ recruitment efforts.

“While cigarette manufacturers,” Sohn said, “often frame smoking as an act of free choice, that choice is just an illusion. Free choice is denied to people in all stages of cigarette manufacturing and consumption.”

For example, he explained that children in the African country of Malawi are coerced to work with their families in tobacco fields. “It’s deeply disturbing to hear companies associate freedom with high-paying jobs in cigarette manufacturing.”

For biology major Annabel Chen, the most important thing she learned was to analyze information skeptically. “Industries like big tobacco have influences in unexpected places, so you always need to do sleuthing to find out the truth,” she said.

She chose to examine the links between tobacco and academic research in China. “Seeing as China is the biggest tobacco market in the world, this was a problem we needed to address.”

Kohrman appreciates how students like Sohn and Chen were willing to try an experimental course, never taught before, and which for many was outside of their comfort zone. He said the course will be taught again in 2015-16.

“Looking back, it was the perfect-size group for all the work and one-on-one teaching we did,” he said.

The course was a classic collaboration, according to Kohrman, who also credits Claudia Engel, a lecturer in the Anthropology Department who helped with the technology and his own experiences mentoring undergraduate research, all of which proved instrumental to designing Smoke and Mirrors in Global Health.

“It was a great success today,” he said after seeing the student projects on the last day of class. Tom Glynn, a top adviser to the American Cancer Society, was on hand to see the presentations.

Kohrman added, “Students got tremendous feedback, and there was lots of enthusiasm about how this experimental course unfolded.”

Clifton Parker is a writer for the Stanford News Service.

Hero Image
flickr shizhao smokingarea
Smoking area sign.
Flickr/Shizhao
All News button
1
Paragraphs

We examine how variation in local economic conditions has shaped the AIDS epidemic in Africa. Using data from over 200,000 individuals across 19 countries, we match biomarker data on individuals' serostatus to information on local rainfall shocks, a large source of income variation for rural households. We estimate infection rates in HIV-endemic rural areas increase by 11% for every recent drought, an effect that is statistically and economically significant. Income shocks explain up to 20% of variation in HIV prevalence across African countries, suggesting existing approaches to HIV prevention could be bolstered by helping households manage income risk better.

All Publications button
1
Publication Type
Journal Articles
Publication Date
Journal Publisher
The Economic Journal
Authors
News Type
News
Date
Paragraphs

Bad weather in sub-Saharan Africa increases the spread of HIV, according to a study published in the June 2015 issue of the Economic Journal, co-authored by Stanford professor and FSE fellow Marshall Burke.

When the rains fail, farmers in rural areas often see their incomes fall dramatically and will try to make up for it however they can, including through sex work. Analysing data on more than 200,000 individuals across 19 African countries, the research team finds that by changing sexual behaviour, a year of very low rainfall can increase local infection rates by more than 10%.

The results have important policy implications for fighting the spread of the epidemic, as co-author Erick Gong of Middlebury College notes:

‘Existing approaches to stopping the spread of HIV – such as promoting condom use and the use of anti-retrovirals – remain critically important. But our results suggest that other policy approaches could be very useful too – in particular, approaches that provide safety nets to rural households when the weather turns bad.’

Policies and investments seemingly unrelated to HIV – such as the promotion of rural insurance or household savings schemes, or the development of drought-tolerant crops – might have surprising benefits in slowing the HIV epidemic. Co-author Kelly Jones of the International Food Policy Research Institute says:

‘The HIV/AIDS epidemic remains one of the world’s greatest health challenges, with over a million new infections per year in Africa alone. Our results expand the menu of options for addressing the epidemic, and highlight some surprising options that are not at the forefront of people’s minds.’

The research sheds valuable light on why HIV continues to spread in Africa. Previous studies have documented in limited settings that poor women often alter their sexual behaviour in response to an income shortfall. But until now, there has been little evidence that this response is big enough to affect the trajectory of the HIV epidemic.

To fill this gap, the researchers combined data on the HIV status of thousands of people across sub-Saharan Africa with data on the recent rainfall history in each individual’s location.

Because years of low rainfall can lead to much lower incomes in these locations, particularly in rural areas where people depend more heavily on agriculture for their livelihoods, variation in rainfall provides a way to study how changes in local economic conditions affect infection rates. Co-author Marshall Burke comments:

‘We were surprised by how strong the relationship is between recent rainfall fluctuations and local infection rates. As expected, the relationship is much stronger in rural areas, and particularly for women who report working in agriculture. These are the people who really suffer when the rains fail, and who are forced to turn to more desperate measures to make ends meet.’

Notes for editors: ‘Income Shocks and HIV in Africa’ by Marshall Burke, Erick Gong and Kelly Jones is published in the June 2015 issue of the Economic Journal.

Marshall Burke is an assistant professor of Earth System Science at Stanford University. Erick Gong is an assistant professor of economics at Middlebury College. Kelly Jones is a research fellow at the International Food Policy Research Institute (IFPRI).

For further information: contact Marshall Burke on +1-650-736-8571 (email: mburke@stanford.edu); Erick Gong on +1-802-443-5553 (email: egong@middlebury.edu); Kelly Jones on +1-202-862-4641 (email: k.jones@cgiar.org); or Romesh Vaitilingam on +44-7768-661095 (email: romesh@vaitilingam.com; Twitter: @econromesh).

Hero Image
75148497 50e081cd5b b Jon Rawlinson/flickr
All News button
1
Subscribe to Health and the Environment