Afterword
摘要
The United Nations estimates that all over the world, 147 million children have missed more than half of their in-class instruction over the past 2 years due to school closures caused by the Covid-19 pandemic. This means of course a significant loss of future earnings across their lifetimes. In addition, after schools reopened, only 20% of countries implemented measures to foster mental health and provide psychosocial support for students. School absenteeism rose to unprecedented level.