Journal on Policy and Complex Systems
Figure 3 . Compositional proportion of each descendant with agricultural holders in cases that the diffusion speed of agriculture was slow ( Simulation case number 29 , Run 7 ).
Figure 4 . Compositional proportion of each descendant with agricultural holders in cases that the diffusion speed of agriculture was rapid ( Simulation case number 35 , Run 9 ).
In summary , our simulation generated new hypotheses about the processes of population explosion and agricultural diffusion . These are as follows : ( 1 ) agriculture was introduced by immigrants and diffused widely and quickly among native people ; ( 2 ) rapid diffusion of agriculture among the native people created the population explosion in the Gusuku period ; and ( 3 ) during the population explosion , demographic transition occurred by through the marriage institution ( e . g ., polygamous marriage ) to distribute the immigrant trait gene and mtDNA haplogroup D4 preferentially .
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