In an attempt to explain the connection between health disparities and socioeconomic factors, Lleras-Muney (2005) finds that an additional year of schooling caused ∼1.7 year increase in life expectancy in 1920s US. This finding support the ____ theory.
A. Allostatic load
B. Income inequality
C. Efficient producer
D. Time preference (The Fuchs hypothesis)
E. Productive time