The production function characterizes health as a form of human capital, where current
health status is a function of choices and shocks over the individual’s lifetime. Specifically, an
individual’s health capital, such as height, is the result of a set of factors, including previous
health status, medical care, personal behaviors, and environment –some of which are observed,
i.e., altitude, whereas others are not. Some of the determinants are chosen, such as nutritional
intake, medical care, and time spent in seeking care.