This first goal, the analysis of the four ISSP Social Inequality module years (1987, 1992, 1999, and 2009), relied on a simplified version of the status attainment model (Blau and Duncan 1967) or so-called OED triangle, to break down the overall effect of parental background on respondent’s social destination into four different effects (TESO, DESO, IEO and returns to education).