@techreport{Warren2020,
author = {Warren, J.R. and Pfeffer, F. and Helgertz, J. and Xu, D.},
title= {Linking 1940 U.S. census data to the Health and Retirement Survey: Technical documentation},
year = {2020},
URL = {https://hrs.isr.umich.edu/sites/default/files/restricted_data_docs/HRS-1940-Census-Data-Documentation-Report.11.20.2020.pdf},
publisher = {Michigan Center of the Demography of Aging},
address = {Ann Arbor, MI},
institution = {HRS documentation report},
}