@techreport{Schmick2020,
author = {Schmick, E.J. and Shertzer, A.M.},
title= {The Impact of early investments in urban school systems in the United States},
year = {2020},
doi = {10.3386/w25663},
publisher = {National Bureau of Economic Research},
address = {Cambridge},
institution = {NBER working paper 25663},
}