Polycentric Regions: Comparing Complementarity and Institutional Governance in the San Francisco Bay Area, the Randstad and Emilia-Romagna

A gap in the literature that remains largely unfilled is a discussion of how polycentrism relates to broader tensions between strategies of specialised industrial agglomeration economies and diverse regional portfolios. Relatively little is known about how strategies of polycentrism relate to the industrial composition and economic complementarity both at the regional scale and for individual cities within the region. In this paper, correspondence analysis is used to quantify complementarity in the economic profiles of cities in three polycentric regions. The findings suggest that the degree of complementarity varies greatly but has decreased in all three of the case study regions over time. Subsequent analysis of institutional structures in these three regions suggests that regions with weaker regional governments, stronger regional identities and intentional polycentric development strategies might experience higher levels of complementarity. A series of hypotheses that relate institutions to complementarity are proposed as possible directions for future research.