Romero, D., Meeder, B., Barash, V. and Kleinberg, J. 2021. Maintaining Ties on Social Media Sites: The Competing Effects of Balance, Exchange, and Betweenness. Proceedings of the International AAAI Conference on Web and Social Media. 5, 1 (Aug. 2021), 606-609. DOI:https://doi.org/10.1609/icwsm.v5i1.14188.