This document discusses how socioeconomic factors across the life course influence subjective well-being in later life. It presents three life course models - critical period, accumulation, and social mobility - and focuses on testing the accumulation model using data from the English Longitudinal Study of Aging. The study examines trajectories of affective, cognitive, and eudaimonic well-being based on participants' occupational class at three time points: parents' occupation at age 14, own education level at age 20, and own occupation at age 50. It finds support for the accumulation model, with diverging well-being trajectories in the third age but leveling off or convergence in the fourth age.