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About the mixedmetro projectWelcome! The mixedmetro project is a cooperative venture to explore the racial and ethnic diversity of US metropolitan neighborhoods. It involves researchers in the Departments of Geography at three US academic institutions: the University of Georgia, the University of Washington, and Dartmouth College. See the Credits page for details about the research team, funding sources, and recommended citations for this research. The parts of this website reporting on household-scale diversity stem from research and analysis undertaken while the authors were conducting research approved by the Center for Economic Studies at the U.S. Census Bureau. It has undergone a Census Bureau review more limited in scope than that given to official Census Bureau publications. Research results and conclusions expressed are those of the authors and do not necessarily indicate concurrence by the Census Bureau. It has been screened to insure that no confidential information is revealed. Please browse through the maps and explore how they depict the patterns of diversity and segregation in these cities, metropolitan regions, and states. If you have questions, comments, or suggestions for improvements to this website, please contact us via the Comments page - we'd like to hear from you.
Using this siteWe currently offer four sets of maps, as well as two sets of transition matrices (see below). All the maps classify census tracts based on racial composition and diversity.
Neighborhood racial segregation and diversity jointly consideredOur intent is to create a classification system that will allow readers to easily comprehend (i.e., "see") a broad range of neighborhoods on the basis of racial composition with an explicit eye towards the notion of diversity. The classification system emerged from detailed explorations of the impact of many configurations of census tract racial composition on a common measure of diversity - scaled entropy.We scaled the standard entropy diversity measure so that Ej ranges between a minimum of 0 and a maximum of 1. For our computations, we calculated Ej based on individuals in 5 racial groups created from the 2000 and 2010 Censuses (white, black, American Indian, Asian and Pacific Islander, "Other Race"), plus Latino/as. The Asian and Pacific Islander category is a combination of two categories on the 2000/2010 Censuses which conforms to the 1990 single aggregate category of Asian and Pacific Islander. We opted for this aggregation to ensure compatibility between this analysis based on 2000/2010 data and future analyses based on comparisons of 1990 and 2000/2010 data. After experimentation, we arrived at the following organization:
Summary statistics for the MixedMetro tract classification scheme are presented and discussed here.
About the concentrations of immigrants, and of mixed-race householdsAdditional overlay options identify tracts which have concentrations of immigrants, or of different types of mixed-race households. These are superimposed on the patterns of neighborhood racial diversity. We deploy the familiar location quotient to measure and depict concentrations of immigrants or mixed-race households. For example:
This ratio equals one when the proportion of immigrants, or mixed-race households in a neighborhood is the same as the proportion in the metropolitan region. Census tracts with high concentrations of the variable in question are outlined using two different line widths. The spaces outlined with thick lines reference "super-concentrations" of immigrants or mixed-race households — neighborhoods identified with location quotients over 2.58 standard deviations above the metropolitan mean — while thinner lines show those with location quotients from 1.96 to 2.58 standard deviations above the mean. The data for these overlays come from confidential files from Census 2000 (for mixed race households) and for both Census 2000 and 2010 (immigration).
Transition matricesTransition matrices, which tally the census tracts that changed classification during the decade and also count the number that did not, allow users another perspective on neighborhood change taking place over the two decades from 1990 to 2010. These tabulations are available for each state and metropolitan area and can be accessed on the front page, or from the individual map pages. |
University of Washington Department of Geography |
Dartmouth College Department of Geography |
University of Georgia Department of Geography |