Influentials, novelty, and social contagion: The viral power of average friends, close communities, and old news. - Nicholas Harrigan; Palakorn Achananuparp; Ee-Peng Lim (Soc. Networks, 2012)

Why does everybody hate me? Balance, status, and homophily: The triumvirate of signed tie formation. - Janice Yap; Nicholas Harrigan (Soc. Networks, 2015)

Avoidance in negative ties: Inhibiting closure, reciprocity, and homophily. - Nicholas Harrigan; Janice Yap (Soc. Networks, 2017)

Negative ties and signed graphs research: Stimulating research on dissociative forces in social networks. - Nicholas M. Harrigan; Giuseppe (Joe) Labianca; Filip Agneessens (Soc. Networks, 2020)

Dimensions of social networks: A taxonomy and operationalization. - Michael Genkin; Nicholas Harrigan; Rajee Kanagavel; Janice Yap (Soc. Networks, 2022)