1. Exploring Wealth Distribution Through Sugarscape
Jordan Albright

2. Purpose
Analyze the wealth distribution of agents in Sugarscape over time
Compare calculations with other studies
Assess validity of project in scope of social science

3. Similar Studies An Agent-Based Model of Wealth Distribution
Impullitti and Rebmann, 2002
Studied sugarscape wealth distribution in context of classical and neo-classical economics
Found it difficult to bridge model and reality in agent based modeling

4. Similar Studies (cont.)
Aligning Simulation Models: A Case Study and Results
Axtell, Axelrod, Epstein, Cohen, 1996
Attempted to synthesize results from Sugarscape and Axelrod model
Difficult to streamline results of models when given same initial conditions

5. Sugarscape
Movement
Vision
Reproduction
Death
Sugar regrowth

6. Wealth Distribution Analysis
Lorenz Curve
Proportion of distribution
Line of perfect equality
Basis for many other functions

7. Wealth Distribution Analysis
Gini coefficient
Measure of inequality
Ratio ranging from 0 to 1
Typical range of developed countries: .3 to .4

8. Wealth Distribution Analysis
Robin Hood/Hoover Index
Max vertical distance from Lorenz curve to perfect distribution line
Proportional to amount of wealth needed to be redistributed for equality

9. Results Comparison of results with Impullitti:
Gini coefficient in project: .4-.5
Gini coefficient in Impullitti: .3 to .33
Different rules for agents
Different initial conditions
No data for Robin Hood index
More comparisons needed to validate results

10. 3rd Quarter Plans Improve speed of program
Find more data for comparison
Add rules for agents