These data were collected to study the effect of men's backgrounds on their careers. The 1962 and 1973 surveys were intended to supplement the March Current Population Surveys conducted by the Census Bureau. The Replicate Data file is a recoded subset of the common variables from the 1962 and 1973 data files. This file was designed to facilitate carrying out comparative analyses of the 1962 and 1973 data. Variables include respondent's age, employment history, military service (1973 only), marital history, ethnicity, income, education, and (in 1962 only) number of children. Also included is information about educational attainment and occupation of the head of the household in which the respondent lived at age 16, intact family, mother's educational attainment (1973 only), number of siblings, and educational attainment of the respondent's oldest and (in 1973 only) youngest brother. Similar data on education, current occupation, and income are available for wives of respondents, but social background data for wives are limited to father's occupation, father's education, number of siblings, and mother's education (1973 only).