Valerie Lee (Univ of Michigan) and Susanna Loeb (Stanford Univ)
“School Size in Chicago Elementary Schools”
https://cepa.stanford.edu/content/school-size-chicago-elementary-schools-effects-teachers%E2%80%99-attitudes-and-students%E2%80%99-achievement
This study of 5,000 teachers and 23,000 students concludes “In small schools, teachers have a more positive attitude about their responsibility for students’ learning and students learn more. Even after taking size into account, learning is also higher in schools with higher levels of collective responsibility. Thus, we conclude that school size influences student achievement directly and indirectly through it effect on teachers’ attitudes.”