Survey Methodology #2006-02 - Use Of Dependent Interviewing Procedures To Improve Data Quality In The Measurement Of Change - U.s. Census Bureau Page 20

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TABLE 1: PRELIMINARY SEAM BIAS ANALYSIS RESULTS FOR VARIOUS NEED-BASED AND OTHER CHARACTERISTICS
(AVERAGED ACROSS INDIVIDUAL ANALYSES OF WAVES 1 AND 2, WAVES 2 AND 3, AND WAVES 3 AND 4) IN THE 2001 AND 2004
SIPP PANELS
Data source: preliminary, internal, unedited (“TransCASES”) questionnaire data files, unweighted
AVERAGE
AVERAGE
ANALYSIS N’s
MONTH-TO-
“DIRECTIONAL”
AVERAGE %
n = Analyzed Interviews
CHANGE
MONTH CHANGE
CHANGE RATES AT
ª = Total Observed Changes
OF ALL
RATE
RATES (%)
THE SEAM
CHANGES
RATIO:
THAT WERE
CHARACTERISTIC
% of
SEAM
SEAM/
“Yes’s”
% of “No’s”
CHANGES
OFF-
that
that changed
W1-W2
W2-W3
W3-W4
SEAM
changed
to “Yes”
(see Notes)
to “No”
PART 1: CHARACTERISTICS WITH NEW DEPENDENT INTERVIEWING PROCEDURES IN THE 2004 PANEL
A. Need-Based Programs
n = 45,560
n = 41,572
n = 40,799
2001
81.9%***
0.6
0.13
3.6
27.7
27.1
1.8
ª = 2,208
ª = 1,831
ª = 1,627
“public” health
1/
insurance coverage
n = 67,211
n = 62,227
n = 60,473
5.0
1.2
2004
57.6%***
0.4
0.21
1.6
7.6
ª = 2,008
ª = 1,625
ª = 1,493
(-82%)
(-33%)
n = 1,596
n = 1,563
n = 1,587
2001
84.6%**
3.1
0.55
18.5
33.6
13.9
88.6
ª = 334
ª = 352
ª = 352
receipt of Federal
SSI (Supplemental
2/
n = 1,826
n = 1,917
n = 1,929
19.4
86.1
Security Income)
2004
77.6%**
4.5
1.2
24.7
20.6
ª = 500
ª = 618
ª = 687
(+40%)
(-3%)
n = 641
n = 619
n = 621
2001
82.2%***
2.4
0.50
13.7
27.4
10.4
82.4
ª = 118
ª = 103
ª = 94
receipt of Veterans’
Compensation/
2/
n = 1,096
n = 1,041
n = 1,006
3.8
52.1
Pensions
2004
47.5%***
1.5
0.90
4.9
5.4
ª = 118
ª = 110
ª = 96
(-63%)
(-37%)

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