Answer:
Congress votes to double the amount of federally subsidized student loans - this will increase the equilibrium level of human capital investments because higher education is one of the most effective ways that people can use to increase their human capital.
There is a decrease in student learning capacities - decrease the equilibrium level of human capital investments because a lower learning capacity will prevent students from reaching their full potential.
Suburban families see a decrease in wealth due to a particularly poor performing sotck market - decrease because suburban families will have less income and wealth to spend, including expenditures in education and training.
The president signs into a law a bill that will reduce discrimination in the labor market - increase because workers that were previously kept from finding employment due to discrimination will now be able to obtain jobs and acquire working experience, this increases their human capital.
The natural talents and abilities of graduating high school students rise - increase because high school graduates have become more naturally skilled and this will help them through college and in their future jobs.