A data frame with 400 observations and 62 numeric variables. The first 15 variables (prefixed 'f') describe the daughters employment status a given year : 1 = education, 2 = inactivity, 3 = part-time job, 4 = full-time job. The following 47 variables (prefixed 'm') describe the mothers employment status at a given age : 1 = self-employment, 3 = higher level or intermediate occupation, 5 = lower level occupation, 8 = inactivity, 9 = education.