Linnemayr, Sebastian
Almost Random Evaluating A Large-Scale Randomized Nutrition Program in the Presence of Crossover / Linnemayr, Sebastian [electronic resource] : Linnemayr, Sebastian - Washington, D.C., The World Bank, 2008 - 1 online resource (35 p.) - Policy research working papers. World Bank e-Library. .
Large-scale randomized interventions have the potential to uncover the causal effect of programs applying to a large population, thereby improving on the insights gained from currently dominant smaller randomized studies. However, the external validity gained through larger interventions typically implies less supervision and often comes at the cost of some deviation from the randomization plan. This paper investigates the impact of the Nutrition Enhancement Program, which aims to improve child nutrition in Senegal based on a large-scale randomized community intervention. The analysis explicitly deals with deviation from the planned treatment and suggests approaches for combining ex-post adjustments such as propensity score matching with the randomized treatment plan. The authors do not detect a strong overall program impact on the outcome measure of weight-for-age based on planned treatment status, but do find an impact on the youngest children. Moreover, the project impact is clearer when the analysis considers treatment crossover using alternative estimators of two-stage least-squares and propensity score matching. The findings underscore the importance of addressing the shortcomings of large-scale randomization interventions in a systematic manner in order to understand the selection process that can guide further implementation of such projects, as well as to expose the true, causal effect of such programs.
10.1596/1813-9450-4784
Breastfeeding
Child diseases
Child nutrition
Communities & Human Settlements
Disease Control and Prevention
Health Monitoring and Evaluation
Health, Nutrition and Population
Housing and Human Habitats
Intervention
Mortality
Nutrition
Nutritional status
Pregnancy
Pregnant women
Public health
Almost Random Evaluating A Large-Scale Randomized Nutrition Program in the Presence of Crossover / Linnemayr, Sebastian [electronic resource] : Linnemayr, Sebastian - Washington, D.C., The World Bank, 2008 - 1 online resource (35 p.) - Policy research working papers. World Bank e-Library. .
Large-scale randomized interventions have the potential to uncover the causal effect of programs applying to a large population, thereby improving on the insights gained from currently dominant smaller randomized studies. However, the external validity gained through larger interventions typically implies less supervision and often comes at the cost of some deviation from the randomization plan. This paper investigates the impact of the Nutrition Enhancement Program, which aims to improve child nutrition in Senegal based on a large-scale randomized community intervention. The analysis explicitly deals with deviation from the planned treatment and suggests approaches for combining ex-post adjustments such as propensity score matching with the randomized treatment plan. The authors do not detect a strong overall program impact on the outcome measure of weight-for-age based on planned treatment status, but do find an impact on the youngest children. Moreover, the project impact is clearer when the analysis considers treatment crossover using alternative estimators of two-stage least-squares and propensity score matching. The findings underscore the importance of addressing the shortcomings of large-scale randomization interventions in a systematic manner in order to understand the selection process that can guide further implementation of such projects, as well as to expose the true, causal effect of such programs.
10.1596/1813-9450-4784
Breastfeeding
Child diseases
Child nutrition
Communities & Human Settlements
Disease Control and Prevention
Health Monitoring and Evaluation
Health, Nutrition and Population
Housing and Human Habitats
Intervention
Mortality
Nutrition
Nutritional status
Pregnancy
Pregnant women
Public health