In this article, the author highlights a recurrent issue related to the historical measurement and use of attendance data: The challenge of producing uniform and reliable records on school attendance. Comparing this issue in the late 1800s to nearly two centuries later, he observes that while the capacity for record keeping and analysis has…

In this article, the author comments on an article by Dunn, Kadane, and Garrow, "Comparing Harm Done by Mobility and Class Absence: Missing Students and Missing Data." He believes the research reported in that article should serve as a model for future applications of Bayesian methods in important educational research problems. The author lauds…