How Advantage Travels Through Families
The Norwegian study does more than show that social position and adult income are related; it asks how that relationship might be produced. This chapter examines the candidate pathways from family position to schooling, firms, partner matching, and adult outcomes, then uses adoption placements and lottery prizes to test competing explanations. The reader’s judgment should be discriminating: some evidence is consistent with a mechanism, while other evidence narrows an explanation without identifying every causal step.
Education, firms, and the social routes into opportunity
Two broad explanations organize the study’s mechanism analysis. One is a human-capital pathway: families with more advantage may help children learn, stay in school, choose academic tracks, and acquire credentials that raise later productivity. The other is an access pathway: family position may expose children to information, institutions, professional networks, and employers where high-return opportunities are available. These pathways can coexist. A child can gain skills and also gain access to a setting that rewards those skills.
The study compares children’s school grades, academic-track completion, education by age 35, and the quality of the firm where they work at age 35. The first four outcomes are treated as closer to human-capital accumulation. Firm quality is measured through an establishment effect from an AKM decomposition, which estimates the wage premium associated with the employer after accounting for worker and firm characteristics. It is not a direct measure of a network tie. It is a way to ask whether children from different family backgrounds sort into workplaces with different wage environments.
The pattern is revealing. Parental social capital and parental income are positively associated with school outcomes, but the relationships are relatively modest. Parental cognitive ability has a much stronger association with grades, academic-track completion, and educational outcomes in the relevant specifications. If the transmission of social advantage operated mainly through the child becoming more academically capable, we would expect the cognitive-ability measure to dominate more consistently.
Firm quality shows a different pattern. Parental social capital and income have stronger associations with the type of firm in which the child works than with the schooling measures. The study interprets this as suggestive evidence that access to networks and institutions helps children sort into employers that pay higher wage premiums. The wording matters. A high-quality employer may reflect skills, preferences, selection, location, family expectations, or professional contacts. The result is consistent with network and institutional access, but it is not a mediation analysis that assigns a fixed share of the income relationship to referrals.
It is also important not to compare the raw coefficients across these outcomes as if they shared one unit. A school-grade rank, an academic-track indicator, a broad education level, and an establishment wage premium are different measures with different scales and populations of available observations. The useful comparison is the pattern within the study: cognitive ability is more closely related to the schooling outcomes, while social capital and income have a relatively stronger relationship with firm quality. That pattern shifts attention from whether a child crossed an educational threshold to which labor-market environment received them afterward. It suggests a route by which similar formal credentials could lead to different adult returns, while leaving open how much of the sorting reflects choice, preparation, or access.