23 citations · 59 across the 21 of their papers we have counts for
23 papers
Conspiracy and Environment Communities on Reddit Sort Along Different Demographic Axes
Miguel Á. Sánchez-Cortés, Corrado Monti, Gianmarco De Francisci Morales
The impact of online platforms in political mobilization is widely documented, yet it remains unclear how it affects different demographic groups. To shed light on this phenomenon,…
P1SCO: Social Dimensions from a Perspectivist Lens
Amanda Cercas Curry, Gianmarco de Francisci Morales, Luca Maria Aiello
We introduce P1SCO, a dataset of social media comments collected from three distinct platforms, annotated according to ten social dimensions to capture the diversity of social inte…
Do Androids Dream of Unseen Puppeteers? Probing for a Conspiracy Tendencies in Large Language Models
Francesco Corso, Francesco Pierri, Gianmarco De Francisci Morales
We investigate whether Large Language Models (LLMs) exhibit conspiratorial tendencies, whether they display socio-demographic biases in this domain, and how easily they can be cond…
Risk-aware Trading Portfolio Optimization
Marco Bianchetti, Gabriele D'Acunto, Gianmarco De Francisci Morales +3
We investigate portfolio optimization in financial markets from a trading and risk management perspective. We term this task Risk-Aware Trading Portfolio Optimization (RATPO), form…
Conspiracy theories and where to find them on TikTok
Francesco Corso, Francesco Pierri, Gianmarco De Francisci Morales
TikTok has skyrocketed in popularity over recent years, especially among younger audiences. However, there are public concerns about the potential of this platform to promote and a…
Variational Inference of Parameters in Opinion Dynamics Models
Jacopo Lenti, Fabrizio Silvestri, Gianmarco De Francisci Morales
Despite the frequent use of agent-based models (ABMs) for studying social phenomena, parameter estimation remains a challenge, often relying on costly simulation-based heuristics.…
Higher-order null models as a lens for social systems
Giulia Preti, Adriano Fazzone, Giovanni Petri +1
Despite the widespread adoption of higher-order mathematical structures such as hypergraphs, methodological tools for their analysis lag behind those for traditional graphs. This w…
What we can learn from TikTok through its Research API
Francesco Corso, Francesco Pierri, Gianmarco De Francisci Morales
TikTok is a social media platform that has gained immense popularity over the last few years, particularly among younger demographics, due to the viral trends and challenges shared…
Navigating Multidimensional Ideologies with Reddit's Political Compass: Economic Conflict and Social Affinity
Ernesto Colacrai, Federico Cinus, Gianmarco De Francisci Morales +1
The prevalent perspective in quantitative research on opinion dynamics flattens the landscape of the online political discourse into a traditional left--right dichotomy. While this…
Extracting the Multiscale Causal Backbone of Brain Dynamics
Gabriele D'Acunto, Francesco Bonchi, Gianmarco De Francisci Morales +1
The bulk of the research effort on brain connectivity revolves around statistical associations among brain regions, which do not directly relate to the causal mechanisms governing…
Likelihood-Based Methods Improve Parameter Estimation in Opinion Dynamics Models
Jacopo Lenti, Corrado Monti, Gianmarco De Francisci Morales
We show that a maximum likelihood approach for parameter estimation in agent-based models (ABMs) of opinion dynamics outperforms the typical simulation-based approach. Simulation-b…
Narratives of War: Ukrainian Memetic Warfare on Twitter
Yelena Mejova, Arthur Capozzi, Corrado Monti +1
The 2022 Russian invasion of Ukraine has seen an intensification in the use of social media by governmental actors in cyber warfare. Wartime communication via memes has been a succ…
Hyper-distance Oracles in Hypergraphs
Giulia Preti, Gianmarco De Francisci Morales, Francesco Bonchi
We study point-to-point distance estimation in hypergraphs, where the query is parameterized by a positive integer s, which defines the required level of overlap for two hyperedges…
Authority without Care: Moral Values behind the Mask Mandate Response
Yelena Mejova, Kyrieki Kalimeri, Gianmarco De Francisci Morales
Face masks are one of the cheapest and most effective non-pharmaceutical interventions available against airborne diseases such as COVID-19. Unfortunately, they have been met with…
The Thin Ideology of Populist Advertising on Facebook during the 2019 EU Elections
Arthur Capozzi, Gianmarco De Francisci Morales, Yelena Mejova +2
Social media has been an important tool in the expansion of the populist message, and it is thought to have contributed to the electoral success of populist parties in the past dec…
Evidence of Demographic rather than Ideological Segregation in News Discussion on Reddit
Corrado Monti, Jacopo D'Ignazi, Michele Starnini +1
We evaluate homophily and heterophily among ideological and demographic groups in a typical opinion formation context: online discussions of current news. We analyze user interacti…
Learning Multiscale Non-stationary Causal Structures
Gabriele D'Acunto, Gianmarco De Francisci Morales, Paolo Bajardi +1
This paper addresses a gap in the current state of the art by providing a solution for modeling causal relationships that evolve over time and occur at different time scales. Speci…
On the Relation Between Opinion Change and Information Consumption on Reddit
Flavio Petruzzellis, Corrado Monti, Gianmarco De Francisci Morales +1
While much attention has been devoted to the causes of opinion change, little is known about its consequences. Our study sheds a light on the relationship between one user's opinio…
On learning agent-based models from data
Corrado Monti, Marco Pangallo, Gianmarco De Francisci Morales +1
Agent-Based Models (ABMs) are used in several fields to study the evolution of complex systems from micro-level assumptions. However, ABMs typically can not estimate agent-specific…
The Evolving Causal Structure of Equity Risk Factors
Gabriele D'Acunto, Paolo Bajardi, Francesco Bonchi +1
In recent years, multi-factor strategies have gained increasing popularity in the financial industry, as they allow investors to have a better understanding of the risk drivers und…
From Reddit to Wall Street: The role of committed minorities in financial collective action
Lorenzo Lucchini, Luca Maria Aiello, Laura Alessandretti +3
In January 2021, retail investors coordinated on Reddit to target short selling activity by hedge funds on GameStop shares, causing a surge in the share price and triggering signif…
VHT: Vertical Hoeffding Tree
Nicolas Kourtellis, Gianmarco De Francisci Morales, Albert Bifet +1
IoT Big Data requires new machine learning methods able to scale to large size of data arriving at high speed. Decision trees are popular machine learning models since they are ver…
Scalable Online Betweenness Centrality in Evolving Graphs
Nicolas Kourtellis, Gianmarco De Francisci Morales, Francesco Bonchi
Betweenness centrality is a classic measure that quantifies the importance of a graph element (vertex or edge) according to the fraction of shortest paths passing through it. This…