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SPAG: Index of spatial agglomeration
Author(s) -
Kopczewska Katarzyna,
Churski Paweł,
Ochojski Artur,
Polko Adam
Publication year - 2019
Publication title -
papers in regional science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.937
H-Index - 64
eISSN - 1435-5957
pISSN - 1056-8190
DOI - 10.1111/pirs.12470
Subject(s) - index (typography) , economies of agglomeration , econometrics , benchmark (surveying) , representation (politics) , distribution (mathematics) , point (geometry) , spatial distribution , divergence (linguistics) , economic geography , geography , computer science , mathematics , statistics , economics , cartography , microeconomics , geometry , mathematical analysis , linguistics , philosophy , politics , world wide web , political science , law
Abstract The paper develops a spatial agglomeration index (SPAG) of the economic activity for the point geo‐localizations of firms. It includes the effects of location, the distance between firms and the overlapping impact of the firms' size. The SPAG builds a new class of measures of the spatial density of the economic activity inside the region, based on the geometrical representation of firms with circles, without referring to the commonly used Ripley's K function. The SPAG measures the degree of divergence from the benchmark distribution, what detects different spatial distributions as clusters or borderline dispersion. We test SPAG with real point data.