more than one school. Yet, little is known about the impact of multiple school jobs on teachers' productivity. This paper … one school. We use longitudinal data of students and teachers from the municipality of Rio de Janeiro, Brazil, over a … period of 7 years and exploit within teacher-school-grade variation in the number of school jobs over time. We found …

students who volunteer for at least 3 hours per week. They were randomly assigned to middle school students, from a list of … potential beneficiaries compiled by school principals. Using original survey data collected from students, parents, teachers and …

students who volunteer for 3 to 6 hours per week. They were randomly assigned to middle school students, from a list of … potential beneficiaries compiled by school principals. Using original survey data collected from students, parents, teachers and …