Table 2. Parameter values of the default version of the model.

Parameter Description Range Default value
γ Degradation factor [0, 2] 1
gr Regeneration level of soil per year [0.05, 0.1188] 0.0844
η Annual depletion rate of resource per household 0.5
α Production elasticity 0.2
ys Years of storage [1, 9] 5
ls Loss rate storage [0,0.5] 0.25
lf Learning factor [0,2] 1
Tmin Threshold of expected food available in other cell in order to migrate [1,2] 1.5
hmin Minimum level of food a year 85
dmax Maximum level of debt [0, 100000] 100
rmax Radius around existing settlement as migration opportunities [1, 9] 5
b Buffer [0,100] 50
bm Minimum relative size of buffer [0, 1] 0.5
rd Annual death rate 0.02
rb Annual birth rate 0.03