What are the different sources of data being used in this package and how old are those datasets?
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What is the source of this dataset?
Stats and Demographics
population
population_density
population_by_year
population_by_age
population_by_gender
population_by_race
head_of_household_by_age
families_vs_singles
households_with_kids
children_by_age
Looking at the source code and commits since 2016.
The database is updated 2019.
https://datahub.io/machu-gwu/uszipcode-0.2.0-simple_db
WE can't say for certain what is in the database. There are a few about.rst files which give clues.
https://github.com/MacHu-GWU/uszipcode-project/tree/master/dataset
https://github.com/MacHu-GWU/uszipcode-project/blob/master/dataset/federalgovernmentzipcodes/about.rst
https://github.com/MacHu-GWU/uszipcode-project/blob/master/dataset/zcta2010/about.rst
Therefore I think answer to your question is 2010 census data and american community survey 2012 1-year estimates, from us census bureau, interpreted through proximity one, and then through the author of this repo, into a database that we then use.
According to the about file it is pulled from
which has more details here
There you can clikc and see.
These data are based on the American Community Survey (ACS) 2012 1-year estimates.
http://proximityone.com/puma12dp1.htm
Census 2010 and ACS 2012 provide the most current Census-sourced demographics for wide-ranging geography. http://proximityone.com/puma12dp1.htm
Public Use Microdata Areas (PUMAs) -- https://www.census.gov/programs-surveys/geography/guidance/geo-areas/pumas.html
Are there errors along the way? Who knows...
@jwaladhamala to be honest, I don't know the correctness of the Stats and Demographics. This data source is mostly from open census data.