Abstract：In this paper we extend measurement of attractions to the variable of differentiation. We present results from an extensive
empirical study of Stockholm, in the aim to pave the way towards a spatial variable of differentiation in spatial
morphology, with direct impact on socio-economic diversity. The investigation concerns a correlation analysis between,
on the one hand, measures of the configuration of plot systems, and on the other hand, categories of economic activity,
measured using Simpson Diversity Index.The twofold aim of the paper includes first, presenting an overview of complex
issues behind diversity concept with the focus on categorisation and scale, and second, empirical studies that support
the proposed impact of variable of differentiation on urban diversity.