Class size reduction, bullying, and violent behavior: Evidence from West Bank schools

Class size is one of the predominant topics in educational policy debate, as its impact on academic performance has not always yielded consistent findings. Nevertheless, less emphasis was paid to noncognitive outcomes such as well-being and behavioral issues. This study employs rich administrative and survey data to investigate the effects of class size on students' bullying and violent behavior as well as cognitive abilities tests. The study uses the maximum class size rule to create a regression discontinuity (RD) relation between cohort enrollment size and class size in the public and the United Nations Relief and Works Agency school system in the West Bank. Further, this study provides evidence that there is no violation of the RD assumptions resulting from discontinuities in the relationship between enrollment and students' household background at cutoff points induced by a maximum class size rule. The findings suggest that class size reduction improves the quality of life for children by mitigating bullying and violent behavior among pupils, which might have long-term adverse effects on academic attainment. Finally, peer relationships and mental health problems are identified as potential mechanisms through which class size influences self-reported levels of bullying and violent behavior among students.