The study is a multivariate analysis on parental contributions of dependent financial aid students in 1983 and 1987. A comparison of the findings indicate that parental contributions significantly increased in general and for the $40-$50K income group in particular.
Mulugetta, Yuko M. and Saleh, Donald A.
"Has the Middle Class Been Pressured Most?,"
Journal of Student Financial Aid: Vol. 18
, Article 3.
Available at: https://ir.library.louisville.edu/jsfa/vol18/iss2/3