1. Lars-Erik Cederman and Luc Girardin
Advanced Computational Modeling of Social Systems
Lars-Erik Cederman and Luc Girardin
Center for Comparative and International Studies (CIS) Swiss Federal Institute of Technology Zurich (ETH)

2. Presentations 07.06.2005 III 14.06.2005 III 21.06.2005 III
Nicolas Bürkler (4)
Thomas Fent
Stephan Gammeter (2)
Jean-Luc Geering (1)
Jeremy Hackney (2)
Lutz Krebs (4)
Benjamin Lutz (1)
Charles Mitchell (3)
Gloria Müller (3)
Carsten Murawski (1)
Jonas Nart (3)
Nils Weidmann (2)

3. Positive feedback
Brian W. Arthur: “Positive feedbacks in the economy” Scientific American (Feb. 1990)

4. Artificial Economies
Epstein & Axtell Growing Artificial Societies. MIT Press.
Epstein & Axtell

7. Average equilibrium characteristics

8. Price convergence

9. Price convergence

10. The Santa Fe Artificial Stock
Simplistic stock market simulation
Isolates learning speed of traders as critical parameter
N traders
1 unit risky stock, units cash
Each trader seeks to buy or sell stock based on expectations of profit
Only one ‘stock’ in market
Genetic algorithm used for rule evolution
-> Faster learners exploit slower learners

11. The Santa Fe Artificial Stock

12. The Trade Network Game (TNG)
Evolution of trade networks among strategically interacting traders
Buyers, sellers, dealers
Traders instantiated as “tradebots”
Communication between tradebots to determine their trade partners
Tradebots evolve trade strategies

13. The Trade Network Game (TNG)

15. Java Auction Simulator (JASA)