Perplexity, complexity, metroplexity, microplexity: Perspectives for future research on regional growth and change

In this paper I make some summarizing comments regarding the papers in this special issue. I argue that we have entered a product-specialization stage in regional science scholarship and that there may now be a need for some broad synthesizing research such as that characteristic of earlier years of the research venture. I contend that studies of regional growth and development constitute "the highest form of the regional scientist's art." And I argue for greater consideration to be given to disaggregating our variables by demographics and paying greater attention to geographic units and scales. In that spirit, I present some information about the forthcoming new system of Core-Based Statistical Areas. I use an experimental version of the new system of Metropolitan and Micropolitan Statistical Areas to illustrate some urban-scale effects evident in recent county-level growth trends.