Characterising labour market self-containment in London with geographically arranged small multiples

摘要

We present a collection of small multiple graphics that support analysis and understanding of the geography of labour-market self-containment across London's 33 boroughs. Ratios describing supply-side self-containment, the extent to which working residents access jobs locally, anc demand-side self-containment, the extent to which local jobs are filled by local resident workers are first calculated for professional and non-professional occupations and encoded directl) through geographically-arranged bar charts. The full distribution of workers into-and out-of boroughs that underpins these ratios is then revealed via Origin-Destination flows maps (OC maps) - sets of geographically-arranged choropleths. In order to make relative and absolute comparison of borough-to-borough frequencies between occupation types, these OD map! are coloured according to signed chi-square residuals: for every borough-to-borough pair, w< compare the observed number of flows to access professional versus non-professional job; against the number that would be expected given the distribution of those jobs across Londor boroughs. Our geographically-arranged small multiples demonstrate potential for spatial analysis a rich, multivariate structure is depicted that reflects London's economic geography and tha would be difficult to expose using non-visual means.