Every nation has a different setof resources which can nurture its economic development, affecting its patterns and rates of growth. The state of a nation is indicated by four storages within the system: assets, population, money on hand and debt to outsiders. When a typical simulation is run, these variables are plotted, as you can see in the graph.
The hundreds of states and nations of the world are examples. Some have large nonrenewable reserves and less renewable inputs. Some coutries received massive investments and have large debts. Some countries had slow immigration of people and their information. The effects of differences in resources can be studied in this model.
Variables:A = assets
N = population
M = money on hand
D = debt to outsiders
F = reserves
Equations:R = I0/(1 + K1 + K0*A*N)
DF = -N8*F*A
DN = K7*A*N - K8*N - N6*N*N - K9*N - N1*A*NE - N2*R*A*N
DA = K6*M/P3 - K5*A*N - K4*A + N7*F*A + K3*R + K2*R*A *N
DM = IV + P1*N3*R + P2*N4**R*A*N - K6*M - N5*M*D - N7*D
DD = IV - N5*M*D
Simulation:The graph shows the changes of M(red),A (green), N (magenta), D(yellow) and F(blue) over a time period.
Source code: Develop.java
"What if" Experiments: