Fig. 1
From: The measure of socio-economic status in PISA: a review and some suggested improvements
(Source: OECD, PISA 2015 Database; Education at a Glance Database (https://stats.oecd.org/OECDStat_Metadata/ShowMetadata.ashx?Dataset=EAG_NEAC))
Tertiary attainment of fathers (PISA) and of 35–44 year-old men (EAG). Pearson’s linear correlation coefficient between the two series is 0.78 (N = 41)