‘Decision not to decide’: a new challenge for planning

This article examines how the policy-maker’s ‘decision not to decide’ affects different levels of internal organization and how it is reflected in the residential patterns of different population groups. The article explores the dynamics of residential patterns in two case studies: the Collective behaviour of the Sylheti community along Whitechapel Road in Eastern London and the Group Action of the ‘Kol-Torah’ Community in Zangwill Street, Jerusalem, where Inner-markets activities create clear property lines around/within their boundaries and result in a similar homogeneous pattern. Identifying the main engines of organized neighbourhood change and the difficulties of planning and dealing with individuals in the housing market shed light on similar processes occurring in other city centres with diverse population groups.