The papers presented in this volume cover a broad range of topics, ranging from works that ground information-system design on social concepts, to papers that analyze complex social systems using computational methods, or explore socio-technical systems using social sciences methods.

The Determinants of Social Connectedness in Europe.- Combining Language Models and Network Features for Relevance-based Tweet Classification.- Co-Spread of Misinformation and Fact-Checking Content during the Covid-19 Pandemic.- Facebook Ads: Politics of Migration in Italy.- It’s Not Just About Sad Songs: The Effect of Depression on Posting Lyrics and Quotes.- Understanding The MeToo Movement Through The Lens Of The Twitter.- Discovering Daily POI Exploitation using a LTECell Tower Access Trace in Urban Environment.- Identifying the Hierarchical Influence Structure Behind Smart Sanctions Using Network Analysis.- Coverage and Evolution of Cancer and its Risk Factors - A quantitative study with Social Signals and Web-Data.- Detecting Engagement Bots on Social Influencer Marketing.- Social Capital as Engagement and Belief Revision.- Employee Satisfaction in Online Reviews.- Stable Community Structures and Social Exclusion.- Inside the x-rated world of “premium” social media accounts.- Impact of Online Health Awareness Campaign: Case of National Eating Disorders Association.- Moral Framing and Ideological Bias of News.- Malicious Bot Detection in Online Social Networks: Arming Handcrafted Features with Deep Learning.- Spam Detection on Arabic Twitter.- Beyond Groups: Uncovering Dynamic Communities on the WhatsApp Network of Information Dissemination.- Structural invariants in individuals language use: the “ego network” of words.- Dynamics of scientific collaboration networks due to academic migrations.- Social Search and Task-related Relevance Dimensions in Microblogging Sites.-Regional Influences on Tourists Mobility Through the Lens of Social Sensing.-Genuine Personal Identifiers and Mutual Sureties for Sybil-Resilient Community Growth.- Political Framing: US COVID19 Blame Game.- Measuring adolescents’ well-being: correspondence of naïve digital traces to survey data.- A Computational Analysis of Polarization on Indian and Pakistani Social Media.- Young Adult Unemployment Through the Lens of Social Media: Italy as a Case Study.- Women worry about family, men about the economy: Gender differences in emotional responses to COVID19.- Jump on the Bandwagon? Characterizing Bandwagon Phenomenon in Online NBA Fan Communities.- ALONE: A Dataset for Toxic Behavior among Adolescents on Twitter.- Cross-domain Classification of Facial Appearance of Leaders.- The Effect of Structural Affinity on the Diffusion of a Transnational Online Movement: the Case of #MeToo.