Before revision: The authors, economists Brian A. Jacob and Jonah E. Rockoff, predicted that starting high schools one hour later, at about 9 a.m., would result in roughly 17,500 in increased future earnings per student in present value—a benefit:costratio of at least 9: 1 even when changing schedules requires upfront investment to alter bus schedules and/or accommodate later after-school activities 17,500 in increased future earnings per student in present value—a benefit:cost ratio of at least 9:1 even when changing schedules requires upfront investment to alter bus schedules and/or accommodate later after-school activities.As for immediate economic impacts, on the individual district level, delaying school start times could decrease transportation costs.
After revision: The authors, economists Brian A. Jacob and Jonah E. Rockoff, predicted that starting high schools one hour later, at about 9 a.m., would result in roughly 17,500 in increased future earnings per student in present value—a benefit:cost ratio of at least 9:1 even when changing schedules requires upfront investment to alter bus schedules and/or accommodate later after-school activities.As for immediate economic impacts, on the individual district level, delaying school start times could decrease transportation costs.