Table A4.
Robustness to Included States in NIS
| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| Uninsured | Length of Stay | Log Length of Stay | Emergency Admit | |
| All States | ||||
|
| ||||
| MA* After | −0.0231 [−0.0300,−0.0162]*** | −0.0504 [−0.0999,−0.0008]** | −0.0012 [−0.0111,0.0086] | −0.0202 [−0.0397,−0.0007]** |
| N (Nonelderly) | 23,860,930 | 23,913,183 | 23,913,183 | 23,913,983 |
| Mean MA Before | 0.0643 | 5.4256 | 1.4267 | 0.3868 |
| Mean Non-MA Before | 0.0791 | 5.0770 | 1.3552 | 0.3591 |
| Mean MA After | 0.0352 | 5.3717 | 1.4355 | 0.4058 |
| Mean Non-MA After | 0.0817 | 5.0958 | 1.3596 | 0.3745 |
| Northeast | ||||
|
| ||||
| MA* After | −0.0160 [−0.0309,−0.0011]** | −0.0293 [−0.2007,0.1421] | −0.0070 [−0.0551,0.0411] | −0.0293 [−0.0500,−0.0085]** |
| N (Nonelderly) | 4,510,280 | 4,511,992 | 4,511,992 | 4,512,094 |
| Mean Non-MA Before | 0.0790 | 5.6529 | 1.4163 | 0.4281 |
| Mean Non-MA After | 0.0613 | 5.6453 | 1.4203 | 0.4425 |
| New England | ||||
|
| ||||
| MA* After | −0.0159 [−0.0193,−0.0125]*** | −0.0021 [−0.1276,0.1233] | 0.0170 [−0.0214,0.0554] | −0.0411 [−0.0749,−0.0072]** |
| N (Nonelderly) | 1,369,181 | 1,370,420 | 1,370,420 | 1,370,438 |
| Mean Non-MA Before | 0.0450 | 5.3462 | 1.3890 | 0.3337 |
| Mean Non-MA After | 0.0408 | 5.3576 | 1.3840 | 0.3324 |
| All, No ME, VT, CA | ||||
|
| ||||
| MA* After | −0.0236 [−0.0311,−0.0161]*** | −0.0537 [−0.1082,0.0008]* | −0.0022 [−0.0129,0.0085] | −0.0202 [−0.0417,0.0013]* |
| N (Nonelderly) | 21,067,733 | 21,119,253 | 21,119,253 | 21,119,708 |
| Mean Non-MA Before | 0.0837 | 5.0926 | 1.3606 | 0.3653 |
| Mean Non-MA After | 0.0871 | 5.0996 | 1.3644 | 0.3813 |
| 25 Most Insured | ||||
|
| ||||
| MA* After | −0.0246 [−0.0367,−0.0126]*** | −0.0477 [−0.0817,−0.0138]*** | 0.0056 [−0.0012,0.0124] | −0.0066 [−0.0623,0.0491] |
| N (Nonelderly) | 8,028,553 | 8,057,249 | 8,057,249 | 8,057,439 |
| Mean Non-MA Before | 0.0595 | 4.9274 | 1.3424 | 0.3300 |
| Mean Non-MA After | 0.0638 | 4.9342 | 1.3438 | 0.3426 |
|
| ||||
| Balanced Panel (Only Hospitals That Appear in Data in Every Possible Quarter) | ||||
|
| ||||
| MA* After | −0.0273 [−0.0500,−0.0045]** | 0.1087 [−0.0872,0.3045] | 0.0297 [−0.0038,0.0633]* | 0.0244 [−0.0705,0.1193] |
| N (Nonelderly) | 768,541 | 770,696 | 770,696 | 770,699 |
| Mean MA Before | 0.0461 | 5.4089 | 1.4104 | 0.4701 |
| Mean Non-MA Before | 0.0714 | 4.6790 | 1.3037 | 0.2769 |
| Mean MA After | 0.0279 | 5.4701 | 1.4323 | 0.4902 |
| Mean Non-MA After | 0.0800 | 4.6364 | 1.2969 | 0.2720 |
95% asymptotic CI clustered by state:
Significant at .01,
Significant at .05,
Significant at .10
MA*During included but coefficient not reported.
All specifications and means weighted using discharge weights.
All specifications include hospital fixed effects and time fixed effects for 2004 to 2008, quarterly.
“All States” sample includes all states in the 2004–2008 NIS. Does not include AL, AK, DE, ID, MS, MT, ND, NM.
“New England” sample includes MA, CT, NH, VT, ME, RI. “Northeast” sample includes New England, NY, NJ.
“25 Most Insured” includes the top half of states in terms of initial levels of insurance from the CPS.
In decreasing order of insurance, “25 Most Insured” includes: MN, HI, IA, NH, ME, WI, MA, VT, KS, RI, NE, MI, ND (not in NIS), CT, PA, OH, M0, SD, DE (not in NIS), VA, MD, TN, KY, UT.
“Balanced Panel” only includes states that appear in every possible quarter of the data. These hospitals are in AZ (2), CA, CO (2), GA, MA (2), MD, MN, NC, NE, OH, TN, TX (4), UT, WA (4), WV (2).
Source: HCUP NIS 2004–2008 authors’ calculations. See text for more details.