“…Such acquisitions guarantee at least one circulation, and research studies show they circulate even more than the one's purchased through "just-in-case" or the traditional method. Most of these purchases fall in the social sciences and humanities areas (Schroeder, 2012;Mak, 2011Mak, , 2012Booth and O'Brien, 2011;Wilson-Higgins, 2011;Alder, 2007;Perdue and Van Fleet, 1999;Walsh and Walsh, 2009;Foss, 2007;Reighart and Oberlander, 2008;Allen et al, 2003).…”