@book{nitsche_hudde_2022, 
  title={Countries embracing maternal employment opened schools sooner after Covid-19 lockdowns}, 
  DOI={10.4054/mpidr-wp-2022-008}, 
  institution={Max Planck Institute for Demographic Research}, 
  author={Nitsche, Natalie and Hudde, Ansgar}, 
  year={2022}
  }