206 citations · 1.1k across the 21 of their papers we have counts for
23 papers
Fragile, yet resilient: Adaptive decline in a collaboration network of firms
Frank Schweitzer, Giona Casiraghi, Mario V. Tomasello +1
The dynamics of collaboration networks of firms follow a life-cycle of growth and decline. That does not imply they also become less resilient. Instead, declining collaboration net…
An agent-based model of multi-dimensional opinion dynamics and opinion alignment
Simon Schweighofer, David Garcia, Frank Schweitzer
It is known that individual opinions on different policy issues often align to a dominant ideological dimension (e.g. "left" vs. "right") and become increasingly polarized. We prov…
Modeling User Reputation in Online Social Networks: The Role of Costs, Benefits, and Reciprocity
Frank Schweitzer, Pavlin Mavrodiev, Adrian M. Seufert +1
We analyze an agent-based model to estimate how the costs and benefits of users in an online social network (OSN) impact the robustness of the OSN. Benefits are measured in terms o…
How emotions drive opinion polarization: An agent-based model
Frank Schweitzer, Tamas Krivachy, David Garcia
We provide an agent-based model to explain the emergence of collective opinions not based on feedback between different opinions, but based on emotional interactions between agents…
The Dynamics of Emotions in Online Interaction
David Garcia, Arvid Kappas, Dennis Küster +1
We study the changes in emotional states induced by reading and participating in online discussions, empirically testing a computational model of online emotional interaction. Usin…
The QWERTY effect on the web: How typing shapes the meaning of words in online human-computer interaction
David Garcia, Markus Strohmaier
The QWERTY effect postulates that the keyboard layout influences word meanings by linking positivity to the use of the right hand and negativity to the use of the left hand. For ex…
When the Filter Bubble Bursts: Collective Evaluation Dynamics in Online Communities
Adiya Abisheva, David Garcia, Frank Schweitzer
We analyze online collective evaluation processes through positive and negative votes in various social media. We find two modes of collective evaluations that stem from the existe…
Geography of Emotion: Where in a City are People Happier?
Luciano Gallegos, Kristina Lerman, Arthur Huang +1
Location-sharing services were built upon people's desire to share their activities and locations with others. By "checking-in" to a place, such as a restaurant, a park, gym, or tr…
Social signals and algorithmic trading of Bitcoin
David Garcia, Frank Schweitzer
The availability of data on digital traces is growing to unprecedented sizes, but inferring actionable knowledge from large-scale data is far from being trivial. This is especially…
Sentiment cascades in the 15M movement
Raquel Alvarez, David Garcia, Yamir Moreno +1
Recent grassroots movements have suggested that online social networks might play a key role in their organization, as adherents have a fast, many-to-many, communication channel to…
Ideological and Temporal Components of Network Polarization in Online Political Participatory Media
David Garcia, Adiya Abisheva, Simon Schweighofer +2
Political polarization is traditionally analyzed through the ideological stances of groups and parties, but it also has a behavioral component that manifests in the interactions be…
It's a Man's Wikipedia? Assessing Gender Inequality in an Online Encyclopedia
Claudia Wagner, David Garcia, Mohsen Jadidi +1
Wikipedia is a community-created encyclopedia that contains information about notable people from different countries, epochs and disciplines and aims to document the world's knowl…
Online Privacy as a Collective Phenomenon
Emre Sarigol, David Garcia, Frank Schweitzer
The problem of online privacy is often reduced to individual decisions to hide or reveal personal information in online social networks (OSNs). However, with the increasing use of…
The digital traces of bubbles: feedback cycles between socio-economic signals in the Bitcoin economy
David Garcia, Claudio Juan Tessone, Pavlin Mavrodiev +1
What is the role of social interactions in the creation of price bubbles? Answering this question requires obtaining collective behavioural traces generated by the activity of a la…
Gender Asymmetries in Reality and Fiction: The Bechdel Test of Social Media
David Garcia, Ingmar Weber, Venkata Rama Kiran Garimella
The subjective nature of gender inequality motivates the analysis and comparison of data from real and fictional human interaction. We present a computational extension of the Bech…
Who Watches (and Shares) What on YouTube? And When? Using Twitter to Understand YouTube Viewership
Adiya Abisheva, Venkata Rama Kiran Garimella, David Garcia +1
We combine user-centric Twitter data with video-centric YouTube data to analyze who watches and shares what on YouTube. Combination of two data sets, with 87k Twitter users, 5.6mln…
The Role of Emotions in Contributors Activity: A Case Study on the GENTOO Community
David Garcia, Marcelo Serrano Zanetti, Frank Schweitzer
We analyse the relation between the emotions and the activity of contributors in the Open Source Software project Gentoo. Our case study builds on extensive data sets from the proj…
Social Resilience in Online Communities: The Autopsy of Friendster
David Garcia, Pavlin Mavrodiev, Frank Schweitzer
We empirically analyze five online communities: Friendster, Livejournal, Facebook, Orkut, Myspace, to identify causes for the decline of social networks. We define social resilienc…
Measuring Cultural Dynamics Through the Eurovision Song Contest
David García, Dorian Tanase
Measuring culture and its dynamics through surveys has important limitations, but the emerging field of computational social science allows us to overcome them by analyzing large-s…
Agent-based simulations of emotion spreading in online social networks
Milovan Šuvakov, David Garcia, Frank Schweitzer +1
Quantitative analysis of empirical data from online social networks reveals group dynamics in which emotions are involved (Šuvakov et al). Full understanding of the underlying mech…
Emotional persistence in online chatting communities
Antonios Garas, David Garcia, Marcin Skowron +1
How do users behave in online chatrooms, where they instantaneously read and write posts? We analyzed about 2.5 million posts covering various topics in Internet relay channels, an…
Positive words carry less information than negative words
David Garcia, Antonios Garas, Frank Schweitzer
We show that the frequency of word use is not only determined by the word length \cite{Zipf1935} and the average information content \cite{Piantadosi2011}, but also by its emotiona…
An Agent-Based Model of Collective Emotions in Online Communities
Frank Schweitzer, David Garcia
We develop a agent-based framework to model the emergence of collective emotions, which is applied to online communities. Agents individual emotions are described by their valence…