@techreport{callen2024pandemic,
  author      = {Callen, Ian and Goldhaber, D. and Kane, T. J. and McDonald, A. and McEachin, A. and Morton, E.},
  title       = {Pandemic Learning Loss by Student Baseline Achievement: Extent and Sources of Heterogeneity},
  institution = {CALDER},
  number      = {Working Paper No. 292-0224},
  year        = {2024}
}