The program comprises three experiments:
1. Incentives Experiment: This experiment tries to evaluate the impact of incentives to generate demand for child immunization. 140 Primary Health Centers (PHCs), each of which provides health services to about 40 villages, selected from our 7 sample districts were randomly divided in two groups- incentive treatment (group that receives incentives) and incentive control (group that receives no incentives). Incentives will be in the form of mobile credits. Within the incentive group, we further randomize sub-centers (SC), of which there are approximately 5 per PHC, into various levels and slopes of the incentive amount tied with each vaccine:
a. low incentive, flat payment for each vaccine
b. high incentive, flat payment for each vaccine
c. low incentive, increasing payment (incentive amount increases after the third vaccine)
d. high incentive, increasing payment (incentive amount increases after the third vaccine)
2. Communication Experiment: This experiment, which is cross-randomized with the incentive experiment, will study the effectiveness of using various 'seeds' to diffuse information about vaccination as well as convince individuals to immunize their children. For this experiment, 943 villages will be divided into five groups: control group, random seeds group, gossip seeds group, trust seeds group, and trusted gossip seeds group. Each village will have 6 seeds, each of which are identified by seeking nominations from villagers.
3. Targeted Reminders Experiment: The targeted reminders experiment will be conducted across the program districts. Half of the villages will be randomly selected to receive text messages that are tailored to the immunization schedule of the eligible child based on their date of birth collected during the immunization session. The text message will remind primary caregivers about the specific vaccine that the child is due for and when and where it can be administered. This experiment will also be cross-randomized with the incentives experiment.