Academic
A 1982 study at the University of Wisconsin, Milwaukee, concerning the use of gift books in 2 separate parts of the collection, both the PS 3537-PS 3545 section (American literature, 1,039 nongift books and 104 gift books) and the QC 6-QC 75 section (physics, 1,023 nongifts and 16 gift books) showed thatgift books tended to be older than nongift books. For example, in the PS section 375 (36.1%) of the nongift books had been published after 1970 compared to 11 (10.6%) of the gift books; in the QC section 380 (37.1%) of the nongift books had been published after 1970 compared to 2 (12.5%) of the gift books. (Source)
Ibid…. showed thatgift books tended to be old when given to the library. For example, in the PS section 68 (65.4%) of the gift books were over 20 years old when given to the library, while of the PS and QC sections combined, 105 (87.5%) of the gifts were over 10 years old when given to the library. (Source)