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Assessing the nonlinearity of the calorie-income relationship: An estimation strategy – With new insights on nutritional transition in Vietnam

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  • Trinh Thi, Huong
  • Simioni, Michel
  • Thomas-Agnan, Christine

Abstract

Assessing the nonlinearity of the calorie-income relationship is a crucial issue when evaluating policies aimed at fighting against malnutrition. A natural choice would be to adopt a fully nonparametric specification of the relationship in order to let the data reveal its nonlinearity. But, we would be faced with the problem of the curse of dimensionality due to the presence of many control variables in addition to income. Here, we first propose to estimate generalized additive models where only income is supposed to enter nonlinearly in the specification. Second, we use a recent cross-validation procedure in order to choose among various competing specifications including the parametric double-log specification widely used in the literature in addition to GAM specifications. This methodology is implemented for each of the six waves of the Vietnam Household Living Standard Survey from 2004 to 2014. The calorie-income relationship is nonlinear whatever the wave. A strong response of calorie intake to an increase in income for poorest households is highlighted, showing that there is still room for income-based policies to fight against malnutrition. A byproduct of this methodology is the decomposition of the evolution of average calorie intake between the two waves in the part due to population change and that coming from the change in calorie-income relationship, shedding new light on the nutritional transition in Vietnam.

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  • Trinh Thi, Huong & Simioni, Michel & Thomas-Agnan, Christine, 2018. "Assessing the nonlinearity of the calorie-income relationship: An estimation strategy – With new insights on nutritional transition in Vietnam," World Development, Elsevier, vol. 110(C), pages 192-204.
    • Handle: RePEc:eee:wdevel:v:110:y:2018:i:c:p:192-204
    DOI: 10.1016/j.worlddev.2018.05.030
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    2. Hamed Sambo, 2020. "Effect of migration on the food security of households left behind: Evidence from Ethiopia," CEPN Working Papers hal-02881695, HAL.
    3. Hamed Sambo, 2020. "Effect of migration on the food security of households left behind: Evidence from Ethiopia," Working Papers hal-02881695, HAL.
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    6. Trinh Thi, Huong & Simioni, Michel & Thomas-Agnan, Christine, 2018. "Assessing the nonlinearity of the calorie-income relationship: An estimation strategy – With new insights on nutritional transition in Vietnam," World Development, Elsevier, vol. 110(C), pages 192-204.
    7. Qiyan Zeng & Zhipeng He & Yuting Wang, 2022. "The Direct and Structure Effect of Income on Nutrition Demand of Chinese Rural Residents," IJERPH, MDPI, vol. 19(20), pages 1-13, October.
    8. Heard, Brent R. & Thi, Huong Trinh & Burra, Dharani Dhar & Heller, Martin C. & Miller, Shelie A. & Duong, Thanh Thi & Simioni, Michel & Jones, Andrew D., 2020. "The Influence of Household Refrigerator Ownership on Diets in Vietnam," Economics & Human Biology, Elsevier, vol. 39(C).
    9. Hoa-Thi-Minh Nguyen & Huong Do & Adrian Kay & Tom Kompas, 2020. "Rice policy in a transitional economy: balancing the social and political objectives," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 12(3), pages 549-566, June.
    10. Arkadeep Bandyopadhyay & Carlo Azzarri & Beliyou Haile & Chungmann Kim & Cristina Alvarez & Ana Moltedo & Abdul Sattar & Winnie Bell & Beatrice L. Rogers, 2022. "Exploring the association between agricultural production systems and household diets in Viet Nam," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 14(5), pages 1207-1226, October.
    11. Hamed Sambo, 2020. "Effect of migration on the food security of households left behind: Evidence from Ethiopia," CEPN Working Papers 2020-05, Centre d'Economie de l'Université de Paris Nord.
    12. Vu, Khoa & Vuong, Nguyen Dinh Tuan & Vu-Thanh, Tu-Anh & Nguyen, Anh Ngoc, 2022. "Income shock and food insecurity prediction Vietnam under the pandemic," World Development, Elsevier, vol. 153(C).

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