Impose Data Reliability Threshold for Census-related Data

[tiernanmartin]

Tracts with no or extremely small populations should be identified and excluded from the analysis.

A reasonable threshold for King County might be 1,250 (total population) - which would exclude one unpopulated tract and one sparsely populated tract:

Total Population, 2007-2011

Total Population, 2013-2017

[tiernanmartin]

Note: this practice of excluding low-population tracts improves the reliability of the analysis.

See the table footnote on Ding and Hwang, "Gentrification and Residential Mobility in Philadelphia ", p 40