TY  - BOOK
AU  - Linnemayr,Sebastian
AU  - Alderman,Harold
AU  - Linnemayr,Sebastian
TI  - Almost Random: Evaluating A Large-Scale Randomized Nutrition Program in the Presence of Crossover 
PY  - 2008///
CY  - Washington, D.C.
PB  - The World Bank
KW  - Breastfeeding
KW  - Child diseases
KW  - Child nutrition
KW  - Communities & Human Settlements
KW  - Disease Control and Prevention
KW  - Health Monitoring and Evaluation
KW  - Health, Nutrition and Population
KW  - Housing and Human Habitats
KW  - Intervention
KW  - Mortality
KW  - Nutrition
KW  - Nutritional status
KW  - Pregnancy
KW  - Pregnant women
KW  - Public health
N2  - 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
UR  - http://elibrary.worldbank.org/doi/book/10.1596/1813-9450-4784
ER  -