F or most individuals, choosing how much human capital to acquire represents the most important investment decision they make during their lifetimes. These decisions are made earlier in life than are other investment choices, and they have permanent consequences. Mincer's (1958) seminal treatment of these choices implies that preferences (i.e., patience) and the investment return jointly determine an individual's optimal education level, a framework that has become the foundation of the human capital investment literature (Heckman, Lochner, and Todd 2006). Yet to our knowledge, this paper represents the first systematic empirical investigation of the importance of impatience in human capital formation.
1Given that most models of human capital investment use exponential discount rates, this lack of empirical analysis is perhaps understandable; it would hardly be surprising to find individuals with different preferences making different choices. Yet, in a variety of other investment contexts, evidence increasingly suggests that individual-level variation in time preferences is as much a matter of form as degree. Multiple studies have found patterns of investment implying that a sizable fraction of 1 Golsteyn, Grönqvist, and Lindahl (2014) examine the relationship between time preferences and human capital investment in the Swedish context, although their analysis does not focus on time-inconsistency.