City Sector Model

Since 2014, the City Sector Model has been used to portray population trends by functional area within the 53 major metropolitan areas (major metropolitan areas). The current edition classifies small areas (zip code tabulation areas) by demographic factors into five categories (Figure 1). The first two are urban core (central business district and inner ring), while the last three are suburban or exurban.  read more »

The pattern of suburban (and exurban) population growth in the suburbs and exurbs that has dominated the United States since World War II has returned and is intensifying. This is evident from the latest American Community Survey (ACS) data for the 53 major metropolitan areas (more than 1 million population) as analyzed by the City Sector Model (See Note: The City Sector Model).  read more »

Recently, The Wall Street Journal and Newsday, in a photographic spread, trumpeted the 70th anniversary of Levittown, the New York suburban development that provided the model for much of the rapid suburbanization that occurred after the Second World War in the United States. Levittown's production line building also set the stage for the similar suburbs of cities in Canada, Australia, New Zealand and elsewhere.  read more »

The latest small area estimates from the Census Bureau indicate that suburban and exurban areas continue to receive the overwhelming share of growth in metropolitan areas around the country, with a single exception, New York. The new American Community Survey (Note 1) 5 year file provides an update of data at the ZCTA (zip code tabulation area), which are described below, as analyzed by the City Sector Model. The data was collected from 2011 through 2015, and can therefore be considered generally reflective of the middle year of the period, 2013.  read more »

Professors David L. A. Gordon of Queens University (Canada) and Paul Maginn and Sharon Biermann of the University of Western Australia have now shown Australia to be a largely suburban nation. This follows on Professor Gordon’s work with colleagues in 2013 that came to the same conclusion on Canada based upon 2006 census data.  read more »

The Brookings Institution is again out with data on the world’s most affluent metropolitan areas. The GDP data is in Redefining Global Cities, which contains a treasure trove of data.  read more »

Working families and the middle class are becoming an increasingly endangered species in   many parts of United States. Median household income remains below its 1999 peak (inflation adjusted). But the problem is not just stagnant incomes. Expenses are also rising, especially the costs of housing in some cities. As a result, it is becoming more and more difficult to make ends meet.  read more »

After decades of serious economic decline, the inner cores in many of America’s largest metropolitan areas have experienced much improvement in recent years. This is indicated by the “City Sector Model,” (Image 9) which we developed to analyze the largest cities (metropolitan areas) using small functional areas, ZIP Code calculation areas (ZCTAs).  read more »

Data released by the federal government last week provided additional evidence that the suburbs continue to dominate metropolitan area population growth and that the biggest cities are capturing less of the growth than they did at the beginning of the decade.  read more »

American cities seemed to be re-centralizing in the years immediately following the Great Recession, but new American Community Survey data indicates that, contrary to conventional wisdom, Americans continue to disperse though at a much reduced rate. The Census Bureau has just released the five year American Community Survey (2010-2014) small area data used by the City Sector Model to report on population trends within functional sectors of metropolitan areas.  read more »