Understanding the Rapid Reduction of Undernutrition in Nepal, 2001–2011
Derek D. Headey, John Hoddinott
PLoS ONE · 2015 · DOI: 10.1371/journal.pone.0145738
Countries: Nepal
What Was Studied
This paper analyses three rounds of Nepal's nationally representative Demographic and Health Surveys (2001, 2006, 2011) — repeated cross-sectional data, not a panel — to explain why Nepal achieved the fastest recorded decline in child stunting recorded anywhere in the world, doing so in the middle of the Maoist insurgency (2001–2006) and its unstable aftermath. Using a pooled sample of 9,341–9,858 children aged 0–59 months per model, the authors build regression models of height-for-age z-scores (HAZ), stunting, and severe stunting, controlling for household wealth (an asset index), maternal and paternal education, healthcare utilisation (antenatal care visits, hospital delivery, vaccination), village-level open defecation, water source, women's household decision-making, and maternal height. They then apply a Blinder-Oaxaca-style decomposition — multiplying each variable's estimated regression coefficient by its actual change in the population mean between 2001 and 2011 — to quantify how much of Nepal's real-world nutritional improvement each factor can statistically account for.
What They Found
Child stunting fell from 56.6% to 40.0% and severe stunting from 25.3% to 14.6% between 2001 and 2011 (mean HAZ improved by 0.51 standard deviations, from –2.17 to –1.66). The decomposition attributes 0.13 of the predicted 0.40 SD HAZ gain — roughly a third, and the single largest share — to household asset accumulation, whose mean score rose 143% over the decade; maternal education contributed a further 0.06 SD, versus only 0.01 SD for paternal education, confirming maternal but not paternal schooling matters for child growth. Expanded healthcare utilisation — antenatal care, hospital delivery (which rose from 9.2% to 36.3%), and full vaccination (52.4% to 69.8%) — jointly contributed about 0.09 SD, while the sharp fall in village-level open defecation (75.1% to 42.3%) contributed 0.05 SD and maternal height (an intergenerational, non-policy channel) contributed another 0.05 SD. Overall, the model statistically explains about 79% of Nepal's actual HAZ improvement and 78% of the stunting decline, but only 62% of the severe stunting decline.
What This Means for Nepal
Nepal's stunting decline did not stop in 2011: NDHS 2022 shows under-five stunting at 25%, meaning the drivers this paper identifies have kept working, but also that progress has slowed and disparities persist (worst in Madhesh and Lumbini, per NDHS 2022). Three implications follow. First, since asset accumulation was the single largest predictor and Nepal's household wealth growth is now heavily remittance-financed (remittances ~28.2% of GDP, NRB 2025), MoHP and the National Planning Commission should not assume rising incomes alone will keep driving nutrition gains — the paper's own message is that dedicated 'nutrition-sensitive' investment in health access, sanitation, and women's education is what government can actually control, an argument central to Nepal's subsequent multisectoral nutrition planning (MSNP) and the Suaahara programme. Second, because the paper's health-access channel is linked to the same era's expansion of community-based care and the Aama safe-motherhood incentive scheme — which took institutional delivery from 9% in 2001 to 79.4% by NDHS 2022 — local governments, who now own 'basic health and sanitation' under Schedule 8 of the 2015 Constitution, should be resourced to sustain FCHV-led outreach and Community-Led Total Sanitation (CLTS) follow-through, since sanitation gains (open defecation fell from 75.1% to 42.3% in this data, and Nepal was declared an ODF nation in 2019) accounted for a similar-sized share of the nutrition gain as healthcare itself. Third, because maternal — not paternal — education was the schooling channel that mattered, girls' education and adult female literacy programmes (female literacy is still 69.4% versus 83.6% for males, Census 2021) should be treated as nutrition policy, not merely an education-sector concern.
Contextualisation
Nepal's under-five stunting rate — 56.6% in 2001, falling to 40.0% by 2011 in this paper's own data — has continued its decline to 25% by NDHS 2022, making this decomposition the foundational account of a nutrition success story Nepal is still building on. The finding that household asset growth was nutrition's single largest predictor is especially salient now that remittances account for roughly 28.2% of GDP (NRB, 2025): much of Nepal's nutritional gain may reflect migration-financed household wealth rather than a specific health policy, whereas the paper's other major channels — expanded health service access and the fall in open defecation that preceded Nepal's 2019 Open-Defecation-Free declaration — are levers government can directly act on.