Data are essential both to understand the level of malnutrition in a country and to develop strategies to address it. Reliable and recent data are important, as are data that can be compared over time to assess whether strategies are yielding results. Finally, having data available at relevant geographic or administrative units for policy decisions is also critical.
John, Aparna; Knebel, Elisa; Haddad, Lawrence James; and Menon, Purnima. 2015. An assessment of data sources to track progress toward global nutrition targets in India. POSHAN Research Note 6. New Delhi: International Food Policy Research Institute (IFPRI). http://ebrary.ifpri.org/cdm/ref/collection/p15738coll2/id/129722