Table 1 Parameters used in the model.
From: Evolution of family systems and resultant socio-economic structures
Sign | Explanation | Value |
|---|---|---|
b | Minimal birth rate | 1.5* |
f | Increment of birth rate by wealth | 0.3** |
d | Decay rate of wealth | 0.5** |
Nf | Initial number of families in a society | 30* |
Ns | Number of societies in a system | 50* |
μ | Mutation rate for s and λ | 0.03** |
σ | Strength of the noise in productivity | 0.1 |
c | Ratio of capacity and Nf | Varied |
ϵ | Wealth required for survival | Varied |
s | Probability to form extended family | Evolve |
λ | Inequality in the inheritance | Evolve |
