“…Using Census microfile data assembled and standardized through the Integrated Public Use Microdata Series (IPUMS), I estimate the determinants of citizenship in 1900 and 1920 using logistic regression models. The individual attributes explanation suggests that years of residence, age, English ability, education, and country of origin all influence citizenship acquisition (Bernard, 1936;Evans, 1988;Jasso and Rosenzweig, 1986;Liang, 1994;Yang, 1994). The Census questions on years of residence, age, and English ability are similar for 1900 and 1920, providing a highly comparable measure of these variables.…”