Interactions within systems

The Advanced Systems Analysis (ASA) Program uses graph theory, information theory, network analysis and other related fields and develops network-based modeling and assessment frameworks to analyze social, economic, material, energy and other networks.

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Treating natural and human-made systems as networks allows the interdependence of their parts to be addressed in a tractable way; considering dynamic networks also allows systemic risks to be addressed and resilience investigated.

In 2014 ASA studied the branch of systems ecology known as systems ecology where species or functional groups interact through predation; examined “femtorisks” or risks that are perceived as extremely unlikely or small, but because of interconnections or changes in systems, can lead to major collapses or crises; it also made theoretical advances on so-called generalized mini-max solutions to non-zero-sum games of two large groups of agents interacting randomly with each other.

Indirect effects and informational entropy in natural and human networks

Advanced System Analysis (ASA) Program researchers develop methods and case-studies analyzing ecological, economic, energy, financial and other networked empirical systems. These methods often originate in the natural science disciplines (e.g., physics, ecology) and then transfer to social sciences disciplines (e.g., economics). More

Network dynamics and contagion effects in natural and human systems

Advanced Systems Analysis (ASA) Program researchers develop dynamic network models of ecological, economic, and social systems. There is a particular focus on the issue of financial systemic risk and cascading failures in the inter-bank lending network. More

Strategic interactions in multi-agent systems: Game-theoretic approach

Advanced Systems Analysis (ASA) Program researchers are advancing game theory approaches and applying them to the study of stylized models of social interactions. More

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Last edited: 17 March 2015


Elena Rovenskaya

Program Director:Acting Program Director

Advanced Systems Analysis

Evolution and Ecology

T +43(0) 2236 807 608

Further information



International Institute for Applied Systems Analysis (IIASA)
Schlossplatz 1, A-2361 Laxenburg, Austria
Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313