We propose to use the theoretical mincer-ofek (1982) model of career interruptions for the evaluation of a health producing treatment that improves residual functional capacity of workers with peripheral nerve injuries who developed chronic pain (reflex sympathetic dystrophy). The revalued potential to – partially – continue to accumulate productive human capital is linked to increased lifetime earnings capacity restoring – missed out – accumulated productivity. We assume that a worker's psychological well-being directly influences earnings, but also affects the cognitive mechanism to experience pain. Randomized clinical trial data and individual medical records from impaired workers are compared with a control group of randomly selected healthy workers. The estimate of the treatment's average net present value is 49.500 euros per person (in 1995 dutch guilders constant terms).