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AKSOE: Physik sozio-ökonomischer Systeme
AKSOE 10: Poster Session (posters are expected to be displayed the full day 8:30-18:00)
AKSOE 10.54: Poster
Mittwoch, 29. März 2006, 16:00–18:00, P2
The Network of Inter-Regional Direct Investment Stocks across Europe — •Joao M. Rodrigues1, Stefano Battiston1, and Hamza Zeytinoglu2 — 1Chair of Systems Design, ETH Zurich, CH-8092 Zurich — 2Clarifix Ltd., Suite 302, 95 Wilton Road, London SW1V 1BZ, UK
We study the dynamics of inter-regional investment flow in Europe from a complex networks perspective. The network of investment stocks in Europe is investigated at two different levels: the level of firms, based on ownership shares and number of employees; and the level of regions in Europe, by aggregating the ownership network of firms, based on their headquarter location. We focus on statistical distributions and scaling laws of activity, investment stock and connectivity degree both at the two levels. We find that investment stock of firms is power law distributed with an exponent very close to the one found for firm activity. On the other hand investment stock and activity of regions turn out to be log-normal distributed. At both levels we find scaling laws relating investment to activity and connectivity. In particular, we find that investment stock scales with connectivity in a similar way as has been previously found for stock market data.