Abstract
A 52 × 52 Spanish internal migration table for 1963 is regarded as an edge-capacity matrix of a 52-vertex network. The maximum flow and the dual minimum edge cut-sets, between all pairs of vertices, are found. Those cuts which partition the vertices nontrivially—that is, into two sets each of cardinality greater than unity—are of interest. The set in each such pair with the fewer vertices is regarded as a nodal region. It has the attractive property that fewer people migrate into (from) it, as a whole, than into (from) its node. Prominent features of Spanish internal movements are revealed through the presentation of the nodal regions that are found by means of a multiterminal analysis. Badajoz, for example, has a particularly large out-migration sphere of influence, and Vizcaya an extensive in-migration field.
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