Table 1.

Population groups variables

Variable	Definition	Range
α	group 1 fraction of the population	]0;1[
q1,q2	average number of contacts established by individuals in group 1 and 2
$\eta =\frac{q_2}{q1}$	ratio of the average number of contacts	]0;1]
ε	total fraction of contacts across groups	]0;min(α,η(1 - α))]
r	group 1 fraction of traveling population	]0;1]