• Publications
  • Influence
Patterns of link reciprocity in directed networks.
TLDR
It is found that real networks are always either correlated or anticorrelated, and that networks of the same type display similar values of the reciprocity. Expand
Analytical maximum-likelihood method to detect patterns in real networks
TLDR
The method reveals that the null behavior of various correlation properties is different from what previously believed, and highly sensitive to the particular network considered, and shows that important structural properties are currently based on incorrect expressions and provides the exact quantities that should replace them. Expand
Structure and evolution of the world trade network
The World Trade Web (WTW), the network defined by the international import/export trade relationships, has been recently shown to display some important topological properties which are tightlyExpand
Community detection for correlation matrices
TLDR
This work introduces, via a consistent redefinition of null models based on random matrix theory, the appropriate correlation-based counterparts of the most popular community detection techniques, and can filter out both unit-specific noise and system-wide dependencies, and the resulting communities are internally correlated and mutually anti-correlated. Expand
Universal scaling relations in food webs
TLDR
It is proposed to describe food webs as transportation networks by extending to them the concept of allometric scaling (how branching properties change with network size), and it is shown that, whereas the number of loops varies significantly across real webs, spanning trees are characterized by universal scaling relations. Expand
Complexity theory and financial regulation
TLDR
Economic policy needs interdisciplinary network analysis and behavioral modeling for better monitoring and management of highly interconnected economic and financial systems and, thus, may help anticipate and manage future crises. Expand
Fitness-dependent topological properties of the world trade web.
TLDR
It is found that the power-law distributed gross domestic product can be successfully identified with the hidden variable determining the topology of the world trade web: all previously studied properties up to third-order correlation structure are found to be in excellent agreement with the predictions of the model. Expand
Multinetwork of international trade: a commodity-specific analysis.
TLDR
The results suggest that on the top of a relatively time-invariant "intrinsic" taxonomy, the roles played by different commodities in the ITN have become more and more dissimilar, possibly as the result of an increased trade specialization. Expand
Early-warning signals of topological collapse in interbank networks
TLDR
This work analyzes the quarterly interbank exposures among Dutch banks over the period 1998–2008, ending with the crisis, and finds that many topological properties display an abrupt change in 2008, providing a clear – but unpredictable – signature of the crisis. Expand
Reciprocity of weighted networks
TLDR
This work introduces a general approach to the reciprocity of weighted networks, and defines quantities and null models that consistently capture empirical reciprocity patterns at different structural levels and shows that, counter-intuitively, previous reciprocity measures are uninformative. Expand
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