Late-secondary School Enrollment Model
This age-structural model characterizes its variable using 5 categories based on the percent of late-secondary school enrollments (Fig. 1) as a proportion of the population in the appropriate age categories: low (<20.0 percent enrolled), lower-middle (20.0 to 39.9 percent), middle (40.0 to 59.9 percent), upper-middle (60.0 to 79.9), and high (>80.0). The age-structural analysis indicates that:
- states with populations under 5.0 million are likely to attain all categories at younger median ages than more populous states,
- states relying on natural resource wealth (>15% of GDP) are likely to attain all categories at younger median ages than non-resource reliant states; and
- states in the low and lower-middle income categories that are involved in a high-intensity conflict (>1000 battle-related deaths per year) are likely to enter the middle and upper-middle conflict categories later than others.
- that the point at which 50 percent of all countries are expected to be within the lower-middle enrollment category, or a higher category (upper-middle or high) is at a median age of 18.0 (±0.3) For the middle enrollment category, that point is 20.8 (±0.4) years. For the upper-middle income category, that point is at 24.6 (±0.6) years, and for the high category, at 31.4 (±0.3) years.