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Table 3 Variables defining the metapopulation model with one class of individuals in the degree-block approximation

From: Age-specific contacts and travel patterns in the spatial spread of 2009 H1N1 influenza pandemic

Variable Definition
k Degree of a subpopulation, i.e. number of airline connections to other subpopulations
V, V k Total number of subpopulations, number of subpopulations with degree k
N k Population size of subpopulations with degree k
w kk ' = w 0(kk ')θ Number of passengers flying from a subpopulation with degree k to a subpopulation with degree k’
w 0 Mobility scale
d kk ' = w kk '/N k Diffusion rate of passengers flying from a subpopulation with degree to a subpopulation with degree k’