musings of a count question resolution participant new york state data center meeting may 31, 2012...

Musings of a Count Question Resolution Participant

New York State Data Center MeetingMay 31, 2012

Joseph SalvoPopulation DivisionNew York City Department of City Planning

TM

Count Question Resolution

• Originally created to fix a narrow group of problems that caused a lot of pain

• Change very unlikely for what we found to be wrong

• Question: So, why do it?

J. Salvo, Population Division NYC Department of City Planning (5-30-12)

Answer: Work with the Census Bureau on

their 2020 Research Agenda


First, what happenedin New York City’s 2010 Count that captured our attention?


Percent Change in Vacant Housing Units by Census Tract, New York City, 2000‐2010

J. Salvo Population Division NYC Department of City Planning, (5-30-12)

Vacant Housing Units and Not Existing Housing Units

• Two types of vacant housing units in the 2010 Census– Held for seasonal, recreational or occasional use– Regular Vacant – available for rent/sale

A regular vacant has to verified by another enumerator or by other means:

– By a second enumerator in Vacant Delete Check.– The unit is classified as an undeliverable-as-addressed by the

United States Postal Service.

• Housing units found not to exist were required by the Census Bureau to be verified by a second method.

6J. Salvo, Population Division

NYC Department of City Planning (5-30-12)

Final Housing Unit Status Rules Processing Adjudication

• If NRFU and VDC enumerators had differing vacant and delete status codes during final Census processing, the case was coded as a vacant housing unit.



Percent of NRFU and VDC Vacant/Delete Discrepancies by the percent of Small Multi Units in the LCO

8

LCO 2227

LCO 2235

Source: U.S. Census Bureau J. Salvo, Population Division NYC Department of City Planning (5-30-12)

Final Housing Unit Status Rules Processing Adjudication

• If NRFU and VDC enumerators had differing vacant and delete status codes during final Census processing, the case was coded as a vacant housing unit.

• The degree to which discrepancies occurred between the two operations produced the problem seen in several New York City LCOs – the question is why did this happen?



Working with the Census BureauGoals - Post 2010

• Learn from the 2010 Census and apply knowledge to 2020 Planning

• Support MAF updating efforts and selective canvass of the nation in 2019

• Help reality-test 2020 options



Source: Virgile, Matthew, 2010 Census Evaluation of Small Multi-Unit Structures ReportU.S. Census Bureau, February 13, 2012

Percent of NRFU and VDC Vacant/Delete Discrepancies by the percent of Small Multi Units in the LCO

15

LCO 2227

LCO 2235

Source: U.S. Census Bureau J. Salvo, Population Division NYC Department of City Planning (5-30-12)

http://www.census.gov/geo/www/gss/address_summit/census_address_summit.html

The Census Address Summit

National Conservation Training CenterShepherdstown, West Virginia

September 7-9th, 2011




Address List Summit

• Sponsored by the Census Bureau in September of 2011

• Develop methods to preclude the need for a 2019 full block canvass of the nation

• Engage local governments in continuous updating of the Master Address File (MAF)


Address List SummitPilot Study

• Focus on “Hidden” housing units: identification and labeling

• Both a rural and urban problem

• Developing criteria for distinguishing areas in need/not in need of a full canvass in 2019


Pilot Study Detailed Objectives

• Work with local governments to mine administrative data, in an effort to identify sources that can be used to determine areas in need of a targeted canvassing

• Identify a set of criteria that can be used to determine which areas are in need of targeted canvassing

• Reality-test sources/methods with limited sample of geographic areas


New York City Second Round in Count Question Resolution

Two Examples for Consideration


24

28

20

26.02

44

1001

2000

4001

4005

4004

1004

10001001

1009

1000

1003

4002

1007

4000

1005

4003

10011004

5006

1002

1008

2003

1002

1003

1006

2002

1000

2001

2000

5007

1002

2001

2001

2004

3000

2001

48

48 48

48

48

117

123

124

117

117

117 HUs

117

117

117

124

125

117

48

48

Misallocated Population and Housing Units Block-level DataJacob Riis Public Housing Project


358 Unit Apartment Building

From 2000 to 2010 housing units shifted from block 1000 to 1001. Neither have residential units.

117 NYCHA Housing Unit

Legend

Mapspot

2010 Census Block

Building Footprints

Multi-family

Mixed Use

Transportation/Utility

Open Space

1001

Census Tract24

Tract 24 Population = 5,434Total Housing Units = 2,121

Aerial View of Block 1001

Manhattan

Bronx

Brooklyn

Staten Island

Queens

Population Change

Gain of 1,000 or more

500 to 999

-499 to 499

-500 to -999

Loss of 1,000 or more

Change, 2000-2010

Misallocated Population and Housing Units Block-level DataRoosevelt Island, 2000 and 2010

¦

Manhattan

Bronx

Brooklyn

Staten Island

Queens

238.02


0

-2,909-886

-520-210

377153

-825-350 392

185

-2.318-880

00

-4 -2

238.01

Data Links

• DCP Population Division Web site: www.nyc.gov/population

• New York City Census FactFinder: http://gis.nyc.gov/dcp/pa/address.jsp

• Census Bureau Web site:

www.census.gov

musings of a count question resolution participant new york state data center meeting may 31, 2012...

Documents

types of vacant housing

final census processing

new york city lcos

census tract

existing housing units

census evaluation of

planning support maf

census bureau goals