Quote:
Originally Posted by buildup
Those color coded areas of the 5-county area are showing inaccurate information. In the last 2 maps the two dark purple areas above Pennypack Park in NE Philly are the NE Airport and a light industrial park. No one lives there! The first map accurately shows them as a "not applicable" area in white. The same can be said for the South Philly area as well. I also would like to know what dollar amounts they are calling high, middle and low income. Are these by New York standards?
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Here is the PDF to the whole report
http://graphics8.nytimes.com/package...tionreport.pdf
and the whole NYTimes article
http://www.nytimes.com/2011/11/16/us...reardon&st=cse
We use this ratio to classify neighborhoods as poor (median
income ratio < 0.67), low income (ratio between 0.67 and 0.80), low-middle income (ratio
between 0.80 and 1.0), high-middle income (ratio between 1.0 and 1.25), high income (ratio
between 1.25 and 1.5), or affluent (ratio > 1.5). We then compute the proportion of families in
each metropolitan area who live in each of these six categories of neighborhoods. In a highly-
segregated metropolitan area, many families will live in poor or affluent neighborhoods and
relatively few will live in middle-income neighborhoods. Thus, we add together the proportion
of families living in poor and affluent neighborhoods to construct a measure of income
segregation.
Note that this definition of neighborhood poverty and affluence is defined relative to the
median income of the metropolitan area. A typical metropolitan area in 2007 had a median
family income of roughly $75,000; in such a metropolitan area, a poor neighborhood (by our
definition here) would be one in which more than half the families had incomes below $50,000;
an affluent neighborhood would be one in which more than half the families had incomes above
$112,500. The advantage of this measure is that it is relatively intuitive and readily interpretable.
Two disadvantages of this measure are that it relies on somewhat arbitrary definitions of
neighborhood poverty and affluence and that it may confound changes in income inequality with
changes in segregation. If every family stayed in the same neighborhood but income inequality
grew (high-income families’ incomes rose while low-income families’ incomes declined), we
would observe an increase in the number of poor and affluent neighborhoods, simply because
median incomes would rise, on average, in higher-income neighborhoods and decline in lower-
income neighborhoods.
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shhhh hahaha
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