The PSID Census 1940 file contains records from the 1940 Census for men who were ever a PSID reference person or spouse/partner and were alive in 1940. Whether a 1940 Census record has been found for a PSID person is documented in the publicly available variable “ER32053”. Variables from the 1940 Census, as prepared and documented by IPUMS, are contained in four separate files. Questions regarding these data should be directed to John Robert Warren (warre046@umn.edu).
 
Household File
The Household File contains the household level information from the 1940 Census for those 1940 Census households who have been linked to PSID Persons. It contains 1,706 records and 50 variables. Variables include information on household size and structure and socio-economic circumstances (e.g., ownership of dwelling, house value)

PSID Person File
The PSID Person File contains the individual level information from the 1940 census for those PSID Persons who have been linked to a 1940 Census household. It contains 1,717 records and 116 variables. Variables include information on relationship to the household head, age, sex, race and ethnicity, marital status, birth place, citizenship status, school enrollment and educational attainment, place of birth, place of residence in 1935, labor force status, industry, occupation, working hours, and income.

Non-PSID Person File
The Non-PSID Person File contains all persons who live in a 1940 Census household that has been linked to a PSID person but who have not been identified as PSID individuals themselves. It contains 7,555 records and the same variables as included on the PSID Person File with the exception of the two PSID specific person identifiers. 		  Geographic File
An additional file containing geographic identifiers is available based on separate permission within the restricted use data contract. This file contains the 1940 Census enumeration district variable. Because of the level of precision of enumeration districts, researcher must provide an explicit and detailed justification for exactly how and why the research will benefit from having access to these data. Your Research Plan must include a description of the data that you will merge to the enumeration district.