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With research staff from more than 60 countries, and offices across the globe, IFPRI provides research-based policy solutions to sustainably reduce poverty and end hunger and malnutrition in developing countries.

researcher spotlight

Liangzhi You

Liangzhi You is a Senior Research Fellow and theme leader in the Foresight and Policy Modeling Unit, based in Washington, DC. His research focuses on climate resilience, spatial data and analytics, agroecosystems, and agricultural science policy. Gridded crop production data of the world (SPAM) and the agricultural technology evaluation model (DREAM) are among his research contributions. 

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Where we work

IFPRI currently has more than 600 employees working in over 80 countries with a wide range of local, national, and international partners.

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experts

Development Strategies and Governance

Derek Headey

Senior Research Fellow

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Bio

Derek Headey is a Senior Research Fellow in the Development Strategies and Governance Unit, where he has worked since 2008. A development economist, his research chiefly focuses on agricultural development and nutrition, though he has also worked on economic growth, food security, and poverty reduction issues. He was the Principal Investigator for the Advancing Research on Nutrition and Agriculture project (ARENA, 2013-2021), funded by the Bill and Melinda Gates Foundation. He has published in a variety of journals on topics relating to economics, agriculture, and public health. He also co-authored a widely cited book on the global food crisis with Shenggen Fan, and a number of journal articles on the cause and consequences of higher food prices. He has lived and worked in India and Ethiopia, and joined the Myanmar Agricultural Policy Support Activity (MAPSA) in Yangon.  He received his PhD in Economics from the University of Queensland, Australia.

Languages spoken: English, Spanish

Publications

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Publications

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Book Chapter

Dietary quality and nutrition: Past progress, current and future challenges

2024Mahrt, Kristi; Headey, Derek D.; Ecker, Olivier; Comstock, Andrew R.; Tauseef, Salauddin
Details

Dietary quality and nutrition: Past progress, current and future challenges

Prior to the onset of the COVID-19 pandemic in 2020 and the military coup in 2021, Myanmar was experiencing a period of rapid economic growth and transformation in the wake of economic and political liberalization. Between 2005 and 2017, average annual growth in real GDP per capita was 7.8 percent, making Myanmar the fastest growing economy among the Association of Southeast Asian Nations (ASEAN) countries. Strong growth was accompanied by a halving of the national poverty rate between 2005 and 2017 from 48.2 to 24.8 percent (CSO, UNDP, and World Bank 2019). COVID19 and the economic and political shocks affecting the country since 2021 have led to an economic contraction: 2021 saw an 18 percent drop in real GDP per capita; in 2022, real GDP per capita was estimated to be 15 percent lower than in 2019 (World Bank 2022). The impacts on poverty were even more dire. A high-frequency panel phone survey of mothers and young children in urban Yangon and the rural Dry Zone revealed incomes collapsing during the COVID-19 lockdowns and further income losses in the wake of the February 2021 military takeover (Headey et al. 2022). Prices rose dramatically, with the consumer price index rising by 20 percent between July 2021 and July 2022 (MOPF 2022), while food prices rose by 34 percent over the same period and by about 50 percent between December 2021 and December 2022. Nationally, a variety of different poverty indicators suggest that between 40 and 50 percent of the population was living in poverty in 2022 —poverty rates similar to those found between 2005 and 2010.

Year published

2024

Authors

Mahrt, Kristi; Headey, Derek D.; Ecker, Olivier; Comstock, Andrew R.; Tauseef, Salauddin

Citation

Mahrt, Kristi; Headey, Derek; Ecker, Olivier; Comstock, Andrew; and Tauseef, Salauddin. 2024. Dietary quality and nutrition: Past progress, current and future challenges. In Myanmar’s agrifood system: Historical development, recent shocks, future opportunities, Duncan Boughton, Ben Belton, Isabel Lambrecht, and Bart Minten, eds. Chapter 4, Pp. 79-120. https://hdl.handle.net/10568/155148

Country/Region

Myanmar

Keywords

Asia; South-eastern Asia; Agrifood Systems; Development; Diet Quality; Economic Shock; Governance; Nutrition

Language

English

Access/Licence

Open AccessCC-BY-4.0

Source

Source record

Record type

Book Chapter

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Journal Article

Estimating the cost and affordability of healthy diets: How much do methods matter?

2024Headey, Derek D.; Hirvonen, Kalle; Alderman, Harold
Details

Estimating the cost and affordability of healthy diets: How much do methods matter?

Recently developed cost and affordability of healthy diet (CoAHD) metrics have quickly become mainstream food security indicators. However, published research on the sensitivity of estimation methods is limited. This paper focuses on two important innovations in CoAHD measurement at the global level. First, we develop a demographic scaling factor to adjust healthy diet costs for cross-country differences in age structures, since younger populations generally require fewer calories than older populations. Second, we improve the way in which household expenditure available for purchasing food (“food budgets”) are derived. In addition, we explore sensitivity of global CoAHD estimates to potential problems with the representativeness and food product coverage of global food price data and vary assumptions for activity levels that shape energy expenditure requirements. We apply these explorations to the EAT-Lancet reference diet in 137 countries using price data from 2017. Relative to the conventional methods, we find that demographic scaling and improved food budget derivation substantially reduces the estimated population who cannot afford a healthy diet, from 3.02 to 2.13 billion. Adjustments for low product coverage can lead to modest reductions for specific regions and food groups, while higher physical activity assumptions increase the share of people who cannot afford a healthy diet, though perhaps implausibly so. Methods clearly matter in CoAHD estimation, and more accurate and timelier CoAHD estimates have substantial scope to improve policy analysis, design and targeting.

Year published

2024

Authors

Headey, Derek D.; Hirvonen, Kalle; Alderman, Harold

Citation

Headey, Derek D.; Hirvonen, Kalle; and Alderman, Harold. 2024. Estimating the cost and affordability of healthy diets: How much do methods matter? Food Policy 126(July 2024): 102654. https://doi.org/10.1016/j.foodpol.2024.102654

Keywords

Affordability; Food Security; Healthy Diets; Prices

Language

English

Access/Licence

Open AccessCC-BY-4.0

Links

https://doi.org/10.1016/j.foodpol.2024.102654 Source record

Record type

Journal Article

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Brief

From promises to action: Strengthening global commitments to fight hunger and food insecurity

2024
Menon, Purnima; Resnick, Danielle; Zorbas, Christina; Martin, Will; Vos, Rob; Jones, Eleanor; Suri, Shoba; Iruhiriye, Elyse; Headey, Derek D.; Arndt, Channing
…more Fritschel, Heidi
Details

From promises to action: Strengthening global commitments to fight hunger and food insecurity

Since the Sustainable Development Goals (SDGs) were adopted by the United Nations General Assembly in 2015, heads of state and ministers at global convenings have repeatedly expressed commitments in support of achieving SDG2 — Zero Hunger — by 2030. Yet progress toward SDG2 has stalled, owing to economic slowdowns, unforeseen crises, geopolitical conflict, and lackluster investment in agricultural productivity and open trade. Where have commitments to SDG2 fallen short? While SDG2 calls for ending global hunger, food insecurity, and malnutrition by 2030, this brief predominantly focuses on progress and commitments related to hunger and food insecurity. Drawing on the results of two recent studies, the policy brief (1) discusses trends and setbacks toward reducing hunger and food insecurity, (2) analyzes progress on the “means of implementation,” or mix of finances, technology, and policy choices, to address SDG2, (3) assesses 107 commitment statements in support of SDG2 made at 68 global meetings since 2015, and (4) explores how to improve accountability in the commitment-making process to accelerate progress toward Zero Hunger.

Year published

2024

Authors

Menon, Purnima; Resnick, Danielle; Zorbas, Christina; Martin, Will; Vos, Rob; Jones, Eleanor; Suri, Shoba; Iruhiriye, Elyse; Headey, Derek D.; Arndt, Channing; Fritschel, Heidi

Citation

Menon, Purnima; Resnick, Danielle; Zorbas, Christina; Martin, Will; Vos, Rob; Jones, Eleanor; Suri, Shoba; Iruhiriye, Elyse; Headey, Derek; Arndt, Channing; and Fritschel, Heidi. 2024. From promises to action: Strengthening global commitments to fight hunger and food insecurity. IFPRI Policy Brief July 2024. Washington, DC: International Food Policy Research Institute. https://hdl.handle.net/10568/149046

Keywords

Food Security; Food Policies; Hunger; Governance; Nutrition

Language

English

Access/Licence

Open AccessCC-BY-4.0

Source

Source record

Record type

Brief

Blogs

From crisis to recovery: How CGIAR’s BRIGHT Survey can catalyze evidence-based policy reforms in Sri Lanka
IFPRI Blog
 | 
December 20, 2024

From crisis to recovery: How CGIAR’s BRIGHT Survey can catalyze evidence-based policy reforms in Sri Lanka

By Derek Headey, Joanna van Asselt, Olivier Ecker, and Jean Balié

Research can shape a new government’s decision-making.

Rising food prices are putting children in harm’s way
IFPRI Blog
 | 
February 29, 2024

Rising food prices are putting children in harm’s way

By Derek Headey and Marie Ruel

New evidence quantifies significant negative health effects.

Cash, COVID, coup, crisis: A pre-pandemic maternal and child cash transfer program had sustained dietary benefits during Myanmar’s ongoing emergency
IFPRI Blog
 | 
March 15, 2023

Cash, COVID, coup, crisis: A pre-pandemic maternal and child cash transfer program had sustained dietary benefits during Myanmar’s ongoing emergency

By Derek Headey and Elisa Maffioli

Positive health and nutrition results persist even in adverse circumstances.

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Events

Delivering for Nutrition in South Asia: Connecting the Dots Across Systems
IFPRI Program/Country Event

 | 

December 3 to 5, 2024

Delivering for Nutrition in South Asia: Connecting the Dots Across Systems

South Asia grapples with escalating levels of malnutrition in various forms, including undernutrition, overweight and obesity, and micronutrient deficiencies, alongside increasing incidence of diet-related non-communicable diseases. Malnutrition results from a complex interplay of factors incorporating household and individual decision-making, agriculture and food systems, healthcare services, education, and socio-ecological systems that determine access to services and […]

Building Resilience, Inclusive Growth, and Holistic Transformation in Sri Lanka
IFPRI Program/Country Event

 | 

November 21, 2024, 9:00 – 10:30 am

Building Resilience, Inclusive Growth, and Holistic Transformation in Sri Lanka

Sri Lanka has experienced slow progress in job creation, poverty reduction, and food insecurity, especially in rural areas. Economic challenges are further compounded by climate change risks and vulnerability to global shocks. At the same time, Sri Lanka has immense potential in agriculture and agro-processing, critical needs for infrastructure development, and a large scope for […]

South Asia Launch | Nepal | 2024 Global Food Policy Report: Food Systems for Healthy Diets and Nutrition
Series/Special Event

 | 

August 8 to 9, 2024

South Asia Launch | Nepal | 2024 Global Food Policy Report: Food Systems for Healthy Diets and Nutrition

Despite significant progress in addressing hunger and undernutrition in the early 2000s, malnutrition, in all its forms, remains a major challenge in all regions of the world. Unhealthy diets remain the primary drivers of many forms of malnutrition, including undernutrition, overweight and obesity, micronutrient deficiencies, and diet- related noncommunicable diseases. Today, the number of people […]

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News

September 20, 2023 | Press Release

New study reveals alarming impact of food inflation on child undernutrition in low and middle-income countries

September 20, 2023, Washington, DC: A new study published in Nature Communications sheds light on the critical relationship between food inflation and child undernutrition in low and middle-income countries (LMICs). The study, conducted by Derek Headey and Marie Ruel of the International Food Policy Research Institute (IFPRI), explores the impact of food price volatility on […]

July 03, 2023 | In the News

Low dairy consumption linked to increased rate of child stunting – research (Food Navigator)

“The study’s findings provide compelling arguments for policymakers, public health officials and nutrition experts to prioritize context-specific dairy development strategies that rely on the right mix of local dairy sector interventions and more consumer-oriented trade policies”. The article is featuring a recent study by IFPRI researchers Beliyou Haile and Derek Headey,  “Growth in milk consumption and […]

June 28, 2023 | Press Release

New research shows potential of dairy development to reduce child undernutrition

Washington, DC: Stunting, a form of chronic undernutrition, affects 150 million children worldwide. While nutrition interventions have been shown to reduce stunting, experts have long concluded that other sectors, like agriculture, need to lift more weight. A new research article in the journal Food Policy, by the International Food Policy Research Institute (IFPRI) authors Beliyou Haile […]

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