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3Economies

by Romulus-Catalin Damaceanu (Submitted: 05/31/2011)

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WHAT IS IT?

This agent-based computational model created in NetLogo 4.0.5 and can be used to study the relation between wealth distribution measured by Gini index and technological progress.
It has the following fundamental characteristics:
(i) the turtles are of two types: female and male;
(ii) these turtles have a limited life expectancy determined by the parameters LifeExpectancyMax (maximum life expectancy) and LifeExpectancyMin (minimum life expectancy);
(iii) patches stores a certain amount of water ResWater>=0, a certain amount of food ResFood>=0, a certain amount of coal ResCoal>=0, a certain amount of oil ResOil>=0, a certain amount of gas ResGas>=0, a certain amount of uranium ResUranium>=0, a certain amount of wind ResWind>=0, a certain amount of sun ResSun>=0, a certain amount of tides ResTides>=0, and a certain amount of gethermal heat ResGeothermalHeat>=0; all these resources are converted in energy; these ten resources are divided in two: the first type are renewable resources and here are included water, food, wind, geothermal heat, tides and sun resources that are replenished on every simulation step; the second type are nonrenewable resources (coal, oil, gas, uranium);
(iv) a male and female turtle can create a couple, and a number of children;
(v) the children can inherit the wealth of their parents;
(vi) the needs of every turtle are 1 of energy per one year processed from the available resources found on the patches;
(vii) if these basic needs are not fulfilled then the respective turtle dies.

HOW IT WORKS

The model has the following buttons:
- <Setup> - that declare and setup parameters, initial variables, agents and patches
- <Go> - Start the simulation and stop the simulation when 1000 simulation steps passed or there are no agents;
- <rs> - set the random seed in the interval starting from -9007199254740992 to 9007199254740992.
In addition, the interface tab has the following monitors:
- Index of Gini - keeps the evolution of Gini coeficient;
- Years - keeps the number of years (ticks) passing;
- Number of turtles - keeps the number of turtles.
Also, we have the next plots:
- Lorenz Curve
- Gini Index.

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