Japan, renowned for its significantly aged population, presents a distinctive landscape in elderly care. Notably, there exists no apparent correlation between the economic well-being of the elderly and the limitations they experience in Activities of Daily Living (ADLs) and Instrumental...

We evaluate the causal effect of class size (i.e., number of students in a classroom) on incidence of class closure due to flu epidemic in 2015, 2016, and 2017, applying an instrumental variable method with the Maimonides rule to administrative data of public primary and middle school students...