City Sector Model

Americans continue to favor large houses on large lots. The vast majority of new occupied housing in the major metropolitan areas of the United States was detached between 2000 and 2010 and was located in geographical sectors associated with larger lot sizes. Moreover, houses became bigger, as the median number of rooms increased (both detached and multi-family), and the median new detached house size increased.  read more »

Senior citizens (age 65 and over) are dispersing throughout major metropolitan areas, and specifically away from the urban cores. This is the opposite of the trend suggested by some planners and media sources who claim than seniors are moving to the urban cores.  read more »

The United States lost jobs between 2000 and 2010, the first loss between census years that has been recorded in the nation's history. The decline was attributable to two economic shocks, the contraction following the 9/11 attacks and the Great Recession, the worst financial crisis since the Great Depression. Yet, even in this moribund job market, employment continued to disperse in the nation's major metropolitan areas.  read more »

There have been frequent press reports that baby boomers, those born between 1945 and 1964, are abandoning the suburbs and moving "back" to the urban cores (actually most suburban residents did not move from urban cores). Virtually without exception such stories are based on anecdotes, often gathered by reporters stationed in Manhattan, downtown San Francisco or Washington or elsewhere in urban cores around the nation. Clearly, the anecdotes about boomers who move to suburbs, exurbs, or to outside major metropolitan areas are not readily accessible (and perhaps not as interesting) to the downtown media.  read more »

Many American cities, described commonly as urban cores, are functionally more suburban and exurban, based on urban form, density, and travel behavior characteristics. Data from the 2010 census shows that 42.3 percent of the population of the historical core municipalities was functionally urban core (Figure 1). By comparison, 56.3 of the population lived in functional suburbs and another 1.3 percent in functionally exurban areas (generally outside the urban areas).  read more »

Urban cores are much celebrated but in reality most of the population living in functional urban cores is strongly concentrated in just a handful of major metropolitan areas in the United States. This conclusion is based on an analysis using the City Sector Model, which uses functional characteristics, rather than municipal jurisdictions, to analyze urban core and suburban components of metropolitan areas.  read more »

The very centers of urban cores in many major metropolitan areas are experiencing a resurgence of residential development, including new construction in volumes not seen for decades. There is a general impression, put forward by retro–urbanists (Note 1) and various press outlets that the urban core resurgence reflects a change in the living preferences of younger people – today's Millennials – who they claim are rejecting the suburban and exurban residential choices of their parents and grandparents.  read more »

Much attention has been given the increase in transit use in America. In context, the gains have been small, and very concentrated (see: No Fundamental Shift to Transit, Not Even a Shift). Much of the gain has been in the urban cores, which house only 14 percent of metropolitan area population.  read more »

The major metropolitan areas of the United States experienced virtually all of their overall growth in suburban and exurban areas between 2000 and 2010. This is the conclusion of an analysis of the functional Pre-Auto Urban Cores and functional suburban and exurban areas using the Demographia City Sector Model.  read more »

The 52 major metropolitan areas of the United States are, in aggregate, approximately 86 percent suburban or exurban in function. This is the conclusion from our new City Sector Model, which divides all major metropolitan zip codes into four functional categories, based on urban form, population density and urban travel behavior. The categories are (1) Pre-Auto Urban Core, (2) Auto Suburban: Earlier, (3) Auto Suburban: Later and (4) Auto Exurban.  read more »