Table 2.

False‐negative survey errors for Medicaid reporting in the CPS ASEC

	CY 2000	CY 2001	CY 2002	CY 2003	CY 2004	CY 2005	CY 2006	CY 2007	CY 2008	CY 2009	CY 2010
Correctly classified as enrolled	19 090 000	20 550 000	21 350 000	23 270 000	24 380 000	24 830 000	23 800 091	24 538 855	26 397 133	29 522 452	29 746 502
Incorrectly classified as not enrolled (false‐negative errors)	14 360 000	15 450 000	17 250 000	17 680 000	18 870 000	18 670 000	19 271 550	18 942 205	18 616 298	18 699 087	20 135 208
Percent enrolled who reported no enrollment	42.9%	42.9%	44.7%	43.2%	43.6%	42.9%	44.7%	43.6%	41.4%	38.8%	40.4%
Source of enrollment status among false‐negative errors
Reported	11 030 000	11 960 000	13 240 000	13 730 000	13 980 000	14 350 000	14 903 989	14 899 526	14 542 359	14 666 776	14 632 048
Imputed	3 340 000	3 500 000	4 000 000	3 900 000	4 880 000	4 320 000	4 367 561	4 042 679	4 073 939	4 032 311	5 503 160
Percent of false negatives that were reported (not imputed)	76.8%	77.4%	76.8%	77.9%	74.1%	76.9%	77.3%	78.7%	78.1%	78.4%	72.7%
“Other Insurance” status of false‐negative population:
Insured	8 600 000	9 190 000	10 370 000	10 580 000	11 170 000	10 870 000	11 534 054	11 663 882	11 458 087	11 247 313	12 084 859
Uninsured	5 760 000	6 260 000	6 880 000	7 100 000	7 700 000	7 800 000	7 737 495	7 278 323	7 158 211	7 451 773	8 050 349
Percent false negatives who are uninsured	40.1%	40.5%	39.9%	40.2%	40.8%	41.8%	40.1%	38.4%	38.5%	39.9%	40.0%

Notes: Enrollment status is edited only to assign enrollment, not to take it away, so it never causes false‐negative errors.

Re‐weighted data for Calendar Years 2000‐2005 from SHADAC (2010). Numbers are rounded for 2000‐2005 according to SHADAC report.