Stökiga elever får sämre skolresultat, men lyckas ibland bra i livet ändå. I denna studie har man tittat på vilka beteenden som kan kopplas till högre inkomst senare i livet.
However, whereas internalizing behaviors, like being unforthcoming, depressive or withdrawn, predict lower earnings, externalizing behaviors, such as aggression, predict higher earnings. In other words, the externalizing factor lowers schooling attainment, but appears to have value in the labor market.