“…Also, longer papers tend to cite more references (Abt & Garfield, 2002) and papers that cite more references tend to be better cited (Webster et al, 2009;Mingers & Xu, 2010;Rao, 2011;Bornmann, Schier, Marx, & Daniel, 2012;Robson & Mousquès, 2014;Ale Ebrahim, Ebrahimian, Mousavi, & Tahriri, 2015;Haustein et al, 2015; review of earlier work in Alimohammadi & Sajjadi, 2009). There is even evidence that papers with longer abstracts are better cited (Weinberger, Evans, & Allesina, 2015), possibly because more data-or idea-rich papers have longer abstracts, or just because longer abstracts touch on more points and are thus more likely attract reader interest. These various relationships make it difficult to determine causality in analyses of how manuscript length predicts citation frequency.…”