Abstract
Nader G. A. (1981) The delineation of a hierarchy of nodal regions by means of higher-order factor analysis, Reg. Studies 15, 475–492. The utility of factor analysis in deriving nodal regions from data on flows among a set of places is now well accepted but, until recently, such regionalizations have been based on orthogonally rotated factors and have accordingly resulted in one-tier regions. On the other hand, an oblique rotation of factors, which allows intercorrelations among the factors, will permit the identification of a hierarchy of factors; in the case of interaction data the hierarchy of factors will define a hierarchy of nodal systems. Interaction within the province of Saskatchewan, Canada, is used to illustrate the utility of higher-order factor analysis in the delineation of a nodal hierarchy.
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