The purpose of this study was to analyse the social composition of the USSR Supreme Soviet deputies, and examine the impact of sociological variables on the selection of deputies for re-election. Variables Age, sex, level of educational attainment, occupation in 1966 and 1970. Communist Party membership, membership of 1966 Communist Party of Soviet Union Central Committee, membership of republican Communist Party Central Committee, past USSR Supreme Soviet membership, house in which Deputy sat in 1966 and 1970. Supreme Soviet office holding 1966 - 70, location of constituency 1966 and 1970.