167 citations · 579 across the 16 of their papers we have counts for
18 papers
Wealth Inequality and Planetary Boundaries in a Stylized Agent-Based Model
Thomas Valade, Michael Benzaquen, Matthieu Cristelli +2
At the intersection of rising wealth inequality and intensifying environmental pressures, we investigate a reverse causal relationship that has received comparatively little attent…
V-, U-, L-, or W-shaped economic recovery after COVID: Insights from an Agent Based Model
Dhruv Sharma, Jean-Philippe Bouchaud, Stanislao Gualdi +2
We discuss the impact of a Covid-19--like shock on a simple model economy, described by the previously developed Mark-0 Agent-Based Model. We consider a mixed supply and demand sho…
Portfolio Construction Matters
Stefano Ciliberti, Stanislao Gualdi
The role of portfolio construction in the implementation of equity market neutral factors is often underestimated. Taking the classical momentum strategy as an example, we show tha…
Optimal Inflation Target: Insights from an Agent-Based Model
Jean-Philippe Bouchaud, Stanislao Gualdi, Marco Tarzia +1
Which level of inflation should Central Banks be targeting? We investigate this issue in the context of a simplified Agent Based Model of the economy. Depending on the value of the…
Wisdom of the institutional crowd
Kevin Primicerio, Damien Challet, Stanislao Gualdi
The average portfolio structure of institutional investors is shown to have properties which account for transaction costs in an optimal way. This implies that financial institutio…
Statistically validated network of portfolio overlaps and systemic risk
Stanislao Gualdi, Giulio Cimini, Kevin Primicerio +2
Common asset holding by financial institutions, namely portfolio overlap, is nowadays regarded as an important channel for financial contagion with the potential to trigger fire sa…
On the emergence of scale-free production networks
Stanislao Gualdi, Antoine Mandel
We propose a simple dynamical model of the formation of production networks among monopolistically competitive firms. The model subsumes the standard general equilibrium approach à…
Spontaneous instabilities and stick-slip motion in a generalized Hebraud-Lequeux model
Jean-Philippe Bouchaud, Stanislao Gualdi, Marco Tarzia +1
We revisit the Hébraud-Lequeux (HL) model for the rheology of jammed materials and argue that a possibly important time scale is missing from HL's initial specification. We show th…
Monetary Policy and Dark Corners in a stylized Agent-Based Model
Stanislao Gualdi, Marco Tarzia, Francesco Zamponi +1
We extend in a minimal way the stylized model introduced in in "Tipping Points in Macroeconomic Agent Based Models" [JEDC 50, 29-61 (2015)], with the aim of investigating the role…
Endogenous crisis waves: a stochastic model with synchronized collective behavior
Stanislao Gualdi, Jean-Philippe Bouchaud, Giulia Cencetti +2
We propose a simple framework to understand commonly observed crisis waves in macroeconomic Agent Based models, that is also relevant to a variety of other physical or biological s…
Tipping points in macroeconomic Agent-Based models
Stanislao Gualdi, Marco Tarzia, Francesco Zamponi +1
The aim of this work is to explore the possible types of phenomena that simple macroeconomic Agent-Based models (ABM) can reproduce. We propose a methodology, inspired by statistic…
Trend prediction in temporal bipartite networks: the case of Movielens, Netflix, and Digg
An Zeng, Stanislao Gualdi, Matus Medo +1
Online systems where users purchase or collect items of some kind can be effectively represented by temporal bipartite networks where both nodes and links are added with time. We u…
Crowd Avoidance and Diversity in Socio-Economic Systems and Recommendation
Stanislao Gualdi, Matus Medo, Yi-Cheng Zhang
Recommender systems recommend objects regardless of potential adverse effects of their overcrowding. We address this shortcoming by introducing crowd-avoiding recommendation where…
Temporal effects in the growth of networks
Matus Medo, Giulio Cimini, Stanislao Gualdi
We show that to explain the growth of the citation network by preferential attachment (PA), one has to accept that individual nodes exhibit heterogeneous fitness values that decay…
Influence, originality and similarity in directed acyclic graphs
Stanislao Gualdi, Matus Medo, Yi-Cheng Zhang
We introduce a framework for network analysis based on random walks on directed acyclic graphs where the probability of passing through a given node is the key ingredient. We illus…
Tracing the Evolution of Physics on the Backbone of Citation Networks
S. Gualdi, C. H. Yeung, Y. -C. Zhang
Many innovations are inspired by past ideas in a non-trivial way. Tracing these origins and identifying scientific branches is crucial for research inspirations. In this paper, we…
Self-organized model of cascade spreading
Stanislao Gualdi, Matus Medo, Yi-Cheng Zhang
We study simultaneous price drops of real stocks and show that for high drop thresholds they follow a power-law distribution. To reproduce these collective downturns, we propose a…
How does informational heterogeneity affect the quality of forecasts?
S. Gualdi, A. De Martino
We investigate a toy model of inductive interacting agents aiming to forecast a continuous, exogenous random variable E. Private information on E is spread heterogeneously across a…