Grouped: Here, we group all emails A sent to B across all threads in the corpus, and vice versa, and use these sets of emails to predict the power relation between A and B. This formulation is similar those in <cite>(Bramsen et al., 2011</cite>; Gilbert, 2012) , but our results are not directly comparable since, unlike them, we rely on the ground truth of power relations from (Agarwal et al., 2012) ; however, we created an SVM model that uses word-ngram features similar to theirs as a baseline to our proposed neural architectures.