• Isungset, Martin Arstad; Freese, Jeremy; Andreassen, Ole; Lyngstad, Torkild Hovde (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Siblings share many environments and much of their genetics. Yet, siblings turn out different. Intelligence and education are influenced by birth order, with earlier-born siblings outperforming later-borns. ...