... that the structural features, review uni-grams and meta-data combined are useful inmodeling the helpfulness of both peer reviewsand product reviews, while peer -review spe-cific auxiliary features ... techniques from product reviews can be suc-cessfully tailored to peer reviews, but also show theimportance of peer -review specific features.2 Related WorkPrior studies of peer review in the Natural ... feedback features in reviews (Cho, 2008; Xiongand Litman, 2010), and adapting peer -review assign-ment (Garcia, 2010). However, given some simi-larity between peer reviews and other review types,we...