This paper describes a new dataset, in which measures of educational level and inequality were collected for 48 countries over 13 5-year birth cohorts. Drawing on four representative international surveys (<Emphasis Type="SmallCaps">ess, <Emphasis Type="SmallCaps">eu-silc, <Emphasis Type="SmallCaps">ials and <Emphasis Type="SmallCaps">issp), we collected measures of individual educational attainment...</emphasis></emphasis></emphasis></emphasis>