As part of an ongoing study on young adult psychological and social development, data were obtained through parental reports on the present residences and educational and occupational attainments of 718 present or former residents of Hawaii (average age 31 years). These subjects, as well as their parents, had been tested between 1972 and 1976 on measures of cognitive abilities and personality. The extent of emigration to the mainland in this middle to upper-middle class sample was over 40%. On average, former Hawaii residents now living on the US mainland were of higher intelligence and educational background than their counterparts still living in Hawaii. Differences were also found for number of children, crossethnic marriages, and occupational attainment (males only). In addition, parents of US mainland residents scored significantly higher on measures of cognitive abilities and education than parents of current Hawaii residents.