Treatment and control balance
The demographic and socioeconomic characteristics of the households and children sampled at endline were very similar in the two study arms, with small and statistically insignificant differences in all the characteristics we considered (Table Endline characteristics and baseline outcomes.Abbreviations: EIBF, early initiation of breastfeeding; IFA, iron and folic acid.Adjusted for district. The design effect of cluster random assignment was accounted for using Stata's cluster option.We conducted a principal components analysis using very similar items to those used by the Demographic and Health Survey and used the coefficients from the first principal component to create the wealth index for each household. We then divided the sample into wealth quintiles based on the distribution of the index in the control group.Measured using maternal and child health books when available or through self‐reports otherwise. The baseline survey asked about visits during the first 6 weeks and the endline survey about visits during the first 6 weeks.Other breastfeeding and complementary feeding outcomes analysed at endline were not measured in an equivalent way at baseline and are not reported here.