Regensburg 2004 – wissenschaftliches Programm

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AKSOE: Physik sozio-ökonomischer Systeme

AKSOE 3: Postersitzung

AKSOE 3.9: Poster

Montag, 8. März 2004, 16:00–18:00, Poster D

Networks in a simple freight transport demand model — •Michael Spahn und Peter Wagner — Institute of Transport Research, German Aerospace Center (DLR) in the Helmholtz Association, Rutherfordstrasse 2, 12489 Berlin, Germany

A simplistic model of freight transport demand and the resulting networks of producers and buyers is presented. Transport costs are initially determined stochastically from a given range and define a distance network.

Agents representing buyers of a single good repeatedly try to optimize their supplier network minimizing transport costs while also trying to stick to trusted suppliers. Trust is built up over time in an unchanged supplier-buyer relationship. Producers have a limited inventory of the good and don’t accept further buyers when sold out. Stochastical fluctuations prevent the system from reaching a completely static state.

The resulting transport networks are analyzed in regimes of low and high transport costs. The dynamics of the transport network evolution towards the static distance network are described.