Changes

Defining Innovation Districts (view source)

70 bytes added , 11:52, 7 June 2017

###Census tracts seem to be smaller than zip codes particularly in urban areas, so this might be a more precise unit of data

###Problem: it may be difficult (or impossible) to determine census tract for VC, Fortune 500, and Medical Centers.

##US Census Economic data

###https://www.census.gov/econ/geo-zip.html

##McNair Center data on Medical Centers, Hubs, and Accelerators

#Chronology

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