Does anyone have access to the 1991 paper that claimed that public universities teach just as well as the private ones?
Rather than a paper, this may be a reference to the
bookHow College Affects Students: Findings and Insights From Twenty Years of Research,
by Ernest T. Pascarella and Patrick T. Terenzini, 1991.
Sequel:
How College Affects Students, Volume 2: A Third Decade of Research was published in 2005.
Prequel:
A book similarly reviewing the research about 20 years prior, in 1969: The Impact of College on Students, Feldman and Newcomb.
Note: Feldman and Newcomb also had a work published in 1994.In this landmark work, Kenneth Feldman and Theodore Newcomb review and synthesize the findings of more than 1,500 studies conducted over four decades on the subject. Writing in 1991, Ernest Pascarella and Patrick Terenzini maintained that The Impact of College on Students not only provided the first comprehensive conceptual map of generally uncharted terrain, but also generated a number of major hypotheses about how college influences students. They also noted that Feldman and Newcombe helped to stimulate a torrent of studies on the characteristics of collegiate institutions and how students change and benefit during and after their college years from college attendance. The Impact of College on Students is now a standard text in graduate courses as well as a standard and frequently cited reference for scholars, students, and administrators of higher education. Much of what we understand about the developmental influence of college is based on this work.
Related thread/post:
How College Affects StudentsBTW, the "missing link" from the OP appears to be archived here:
https://web.archive.org/web/20100801000000*/http://i.bnet.com/blogs/grade-inflation.pdf