We evaluate the causal effect of class size (i.e., number of students in a classroom) on incidence of class closure due … among students in a classroom. We find that class size reduction is effective to reduce class closure due to flu: one unit … reduction of class size decreases class closure by about 5%; and forming small classes with 27 students at most, satisfying the …

We evaluate the causal effect of class size (i.e., number of students in a classroom) on incidence of class closure due … among students in a classroom. We find that class size reduction is effective to reduce class closure due to flu: one unit … reduction of class size decreases class closure by about 5%; and forming small classes with 27 students at most, satisfying the …