Why the Gap Widens After School

The Norwegian study’s lifecycle evidence asks when inherited social and financial advantages become visible in children’s earnings. The focus is the path from late adolescence to age 40, not just the age-35 endpoint, and the practical judgment is that early-career convergence can conceal later divergence. Reading the trajectories this way helps distinguish delayed entry from disadvantage, average-income gains from elite attainment, and a snapshot of mobility from a process that unfolds over time.

From delayed entry to mid-career divergence

A single adult-income measure can make family advantage look as if it appeared fully formed. The study’s annual records offer a different view by following children from roughly age 18 through age 40. The first part of that path is not what a simple status hierarchy would predict. Children whose fathers rank high in social capital can earn slightly less in their early twenties than children from lower-social-capital families.

The paper interprets this early difference as consistent with longer schooling and later labor-market entry. A young person who remains in education for longer may have lower earnings at 20 or 22 without having worse long-run prospects. The same observation can therefore mean different things depending on where it occurs in the lifecycle. Early income is partly a measure of whether someone has entered paid work, not only of the opportunities available once they do.

This is a general measurement problem made concrete by the study. If researchers observe only the beginning of a career, they may mistake delayed entry for a lack of inherited advantage. If they observe only one later year, they may see the accumulated gap but miss the transitions through which it formed. The Norwegian data do not solve every causal question, but they make the timing of the relationship visible.

stateDiagram-v2 [*] --> Late state "Late adolescence" as Late state "Schooling and delayed entry" as School state "Observed divergence after age 25" as Diverge state "Career accumulation" as Accumulate state "Age-40 position" as Outcomes state "Average-income path" as Average state "Top-tail attainment" as Tail Late --> School: education continues School --> Diverge: labor-market entry Diverge --> Accumulate: trajectories separate Accumulate --> Outcomes: opportunities compound Outcomes --> Average: mean income outcome Outcomes --> Tail: scarce elite outcome Average --> [*] Tail --> [*]

The transition sequence is descriptive. It does not say that schooling or a particular job mechanically causes every later difference. It shows how a study can distinguish a delayed starting point from the pattern that follows. In the profiles, the income trajectories of the higher- and lower-social-capital groups begin to separate more clearly after about age 25. The gap then widens through the late twenties and thirties.

By age 40, children in the top parental social-capital quartile earn roughly 15–20 percent more than those in the bottom quartile in the paper’s comparison. The corresponding high-versus-low parental-income trajectories show a similar broad shape.