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Matt Kaneshiro Christine Pierce 1/8/2014 LEVERAGING THE STRENGTHS OF THE PRCS LESSONS FROM PPH AND OTHER HOUSEHOLD CHARACTERISTICS ESTIMATED USING THE.

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Presentation on theme: "Matt Kaneshiro Christine Pierce 1/8/2014 LEVERAGING THE STRENGTHS OF THE PRCS LESSONS FROM PPH AND OTHER HOUSEHOLD CHARACTERISTICS ESTIMATED USING THE."— Presentation transcript:

1 Matt Kaneshiro Christine Pierce 1/8/2014 LEVERAGING THE STRENGTHS OF THE PRCS LESSONS FROM PPH AND OTHER HOUSEHOLD CHARACTERISTICS ESTIMATED USING THE PRCS

2 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 2 ISSUE Budget cuts consistently affect the Census Bureau’s efforts to produce accurate and timely estimates. Risk of inaccurate control estimates for the ACS/PRCS Risk of decreased quality of Household and Person characteristics determined by the ACS/PRCS

3 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 3 WHY PUERTO RICO? Let’s assume that budget cuts will affect the quality of: Methodology development (e.g. for migration estimates) Supplemental resources (e.g. MAF updates) Base estimates (e.g. housing units) …in this case, the PRCS can be used to explore the quality that the ACS could have under a “worst-case scenario”

4 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 4 OBJECTIVE Use the Puerto Rico Community Survey (PRCS) as a case study to explore the quality and uses of the ACS if it were to have poor household and persons’ controls, highlighting: Potential: Persons Per Household are usable using an alternate method …which can be used to estimate Households Estimates of household distributions are relatively accurate Cautions: Biases are produced by the data-collection structure

5 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 5 POPULATION ESTIMATE METHOD: 2000 – 2009 Births: Puerto Rico Planning Board Deaths: Puerto Rico Planning Board Net Migration rates (residual method): [2000 enumerated] – [1990-based 2000 projection] Assumptions: Migration rates of the 1990s = migration rates of 2000s Differential coverage across the two censuses is equal

6 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 6 POPULATION ESTIMATE QUALITY: 2000 – 2009 The application of 1990s-based net migration rates to the 2000s produced poor population estimates

7 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 7 HOUSEHOLD ESTIMATE QUALITY: 2000 – 2009 Stable Household estimates were unstable (no MAF updates) *Note: it looks like the problem returns after the 2010 Census

8 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 8 PUT THE TWO TOGETHER: PPH Inflated persons + deflated households = really inflated PPH

9 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 9 SOME CONTEXT: ACS’ PPH DIFFICULTIES The “statistical perspective” of ACS weighting (Swanson and Hough, 2010)

10 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 10 ARE WE DOOMED TO POOR HOUSEHOLD ESTIMATES FOR PUERTO RICO? Not so fast… What is the PRCS? A household survey with sampling rates stratified by block size Household weights are determined by sampling and non-response rates Can we determine PPH if we simply treated the PRCS as a weighted household survey?

11 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 11 PERSONS-PER-HOUSEHOLD An alternative method

12 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 12 RESULTS “PUMS” method for Puerto Rico: average annual sample size = 12732

13 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 13 WHICH STILL WORKS FOR SMALLER GEOGRAPHIES San Juan Municipio: average sample size = 1637

14 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 14 WHICH STILL WORKS FOR SMALLER GEOGRAPHIES Carolina Municipio: average sample size = 644

15 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 15 WHICH STILL WORKS FOR SMALLER GEOGRAPHIES Arecibo Municipio: average sample size = 314

16 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 16 VIEWING THE PRCS AS A HOUSEHOLD SURVEY The alternate PPH method suggests that, controls and weighted counts non- withstanding, the PRCS may still produce good household % distributions. …which begs the question: How does the PRCS perform in estimating other household distributions?

17 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 17 ALLOW ME TO OPEN UP A CAN OF WORMS Let us consider highly mobile populations A Decennial Census captures household members that “live or sleep [here] most of the time”, whereas the ACS captures “everyone who is living or staying [here] for more than 2 months” The ACS is closer to a snapshot-in-time Thus… the ACS may be more sensitive to mobile populations CensusACS

18 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 18 HOUSEHOLD SIZE 1: BINGO …which is presumably a more stable household size

19 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 19 HOUSEHOLD SIZE 4+: UNDERESTIMATE …presumably has more workers “abroad”

20 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 20 AGE OF HOUSEHOLDER 55+: OVERESTIMATE …presumably has fewer workers “abroad”

21 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 21 AGE OF HOUSEHOLDER < 35: UNDERESTIMATE …presumably has more workers “abroad”

22 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 22 CONCLUSIONS Persons-Per-Household estimates can be computed by using a weighted average of household size using the PRCS The PRCS can still produce relatively accurate household characteristic distributions. HOWEVER, differences exist between the PRCS and the Decennial Census (i.e. The PRCS is sensitive to mobile populations).

23 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 23 TAKING IT A STEP FURTHER The PRCS (ACS?) may be leveraged to assist with Household estimates In a world of dramatically-limited budgets, are there other uses of the PRCS/ACS for assisting the Census Bureau? The Master Address File remains to be of high importance The utility of the “statistical perspective” of household weighting continues to be open to debate (Swanson and Hough 2010) The ACS as a surrogate for the “long form” may require greater consideration to the differences between the ACS and Decennial Census Side note: the weighted household size method of estimating PPH does not perform as well for the continental U.S. More research is needed to determine why My guess: overweighting of the ACS

24 Copyright ©2013 The Nielsen Company. Confidential and proprietary. 24 THANKS!

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