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