The effect of education on spousal education: a genetic approach
(by Barban, De Cao, Oreffice and Quintana-Domeque; Labour Economics, 2021)

Fig. 1 in Barban, De Cao, Oreffice and Quintana-Domeque (2021): https://ars.els-cdn.com/content/image/1-s2.0-S0927537121000580-gr1.jpg