Sample size (or number of clusters) by treatment arms
Fourth phase: 2400 villages control, 1400 treated (1/3 information content, 1/3 information and coordination content, 1/3 information and ethnic voting content); Seventh phase: 425 villages control, 425 villages placebo content. In 2022, 1700 control, 2000 treated (4/5 information content, 1/5 information and coordination content).