An overall picture of the education system in the countryside reveals that there are still schools that are not connected to the drinking water and sewerage systems, where the toilet is in the school yard. There are still schools where children stay in classrooms dressed up with outdoor clothing...

In the context of a voluntary remedial math course for university students, we conduct randomized field experiments to study whether social information can help counteract low participation rates. Incoming students receive postal invitation and reminder letters that inform them about past...