Timing and Duration of Exposure in Evaluations of Social Programs
No hay miniatura disponible
Fecha
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
World Bank
Resumen
Descripción
Impact evaluations aim to measure the outcomes that can be attributed to a specific policy or intervention. While there have been excellent reviews of the different methods for estimating impact, insufficient attention has been paid to questions related to timing: How long after a program has begun should it be evaluated? For how long should treatment groups be exposed to a program before they benefit from it? Are there time patterns in a program's impact? This paper examines the evaluation issues related to timing, and discusses the sources of variation in the duration of exposure within programs and their implications for impact estimates. It reviews the evidence from careful evaluations of programs (with a focus on developing countries) on the ways that duration affects impacts.
Palabras clave
aged, child development, community participation, crime, exercises, families, family planning, hospitals, immunization, information campaigns, intervention, medicines, migration, nutrition, siblings, social marketing, social networks, social services, vaccination, workers