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AKSOE: Arbeitskreis Physik sozio-ökonomischer Systeme
AKSOE 5: Social-, Information-, and Production Networks I
AKSOE 5.4: Vortrag
Montag, 25. Februar 2008, 17:30–18:00, EW 203
Using MAS to study the propagation of failures in dynamical supply-chains — •Samir Hamichi1,2, Diana Mangalagiu1,3, and Zahia Guessoum2 — 1Institute for Scientific Interchange Foundation, Turin, Italy — 2LIP6, University Paris 6, France — 3Reims Management School, France
Weisbuch and Battiston [1] introduced a simple model of failure propagation on a production network of firms linked by supply-customer relationships. They studied the evolution of these networks under very simple assumptions, identified the conditions under which local failures can result in avalanches of shortage and bankruptcies across the network and characterized the scale free properties of the model.
We pursue the investigation of this model using a MAS approach and introducing features leading to a more realistic behavior of the production networks: 1) the price is linked to the market demand; 2) the behavior of the firms is adaptive i.e. the orders are linked to the price and reliability of the suppliers; 3) the structure of the network is allowed to evolve over time. Our preliminary results show that the adaptive behavior of the firms reinforces the local structure of the economy, the supply-chains changing from large spatial structures towards tree-like structures. We investigate the stability of the production and wealth patterns, the magnitude of the scale-free distribution of firm wealth as well as the influence of the propagation of failures on the global production of the economy.
[1]. Weisbuch, G. and Battiston, S. Production Networks and Failure Avalanches, JEBO (2007, forthcoming).