Replication information for “Early-Life Exposure to Cigarette Smoking and Adult and Old Age Male Mortality: Evidence from Linked U.S. Full-Count Census and Mortality Data”, authored by Helgertz and Warren The data used for the article is stored on servers maintained by the Institute for Social Research and Data Innovation (ISRDI) at the University of Minnesota. Due to their size (combined>80 GB) and containing names and Social Security Numbers, the data and do-files can be accessed directly through ISRDI. A confidentiality agreement may need to be signed, and accessing the data may require a remote connection, but is straightforward to set up. The syntax uses several different files, with the baseline files containing the following number of observations: 1930 census: 123 million observations 1940 census: 131 million observations 1930 census – NUMIDENT file: 12 million observations 1930 census – SSDMF file: 15 million observations 1940 census – NUMIDENT file: 9 million observations 1940 census – SSDMF file: 12 million observations Numident file: 93 million observations The census variables are thoroughly documented at: https://usa.ipums.org/usa-action/variables/group From the death records (SSDMF/NUMIDENT), we use both date of birth and date of death.