Discussion paper DP16084 Selecting the Most Effective Nudge: Evidence from a Large-Scale Experiment on Immunization Esther Duflo Abhijit Banerjee John Floretta Anna Schrimpf Anirudh Sankar Francine Loza Harini Kannan Matthew O. Jackson Arun G. Chandrasekhar Maheshwor Shrestha Suresh Dalpath 28 Apr 2021 Development Economics C18 C93 D83 I15 O12 O15