APPENDIX EXHIBIT A2.
(1) | (2) | (3) | (4) | (5) | (6) | |
---|---|---|---|---|---|---|
VARIABLES | Physician-Hospital Integration | Physician HHI | Weighted Average TIN Size | Hospital HHI | Inpatient Price Index | Outpatient Price Index |
Year | 0.011*** | 9.596 | 2.513** | 51.860*** | 0.049*** | 0.023*** |
(0.001) | (6.343) | (1.236) | (12.018) | (0.002) | (0.001) | |
Year*Post | 0.002** | 5.418 | 1.559* | 1.428 | −0.006*** | 0.000 |
(0.001) | (3.828) | (0.935) | (6.539) | (0.001) | (0.001) | |
Observations | 1,734 | 1,734 | 1,734 | 1,734 | 1,356 | 1,356 |
R-squared | 0.948 | 0.976 | 0.941 | 0.981 | 0.927 | 0.976 |
MSA FE | Yes | Yes | Yes | Yes | Yes | Yes |
F Statistic | 56.62 | 6.377 | 11.31 | 17.88 | 508.2 | 292.2 |
Robust standard errors in parentheses
p<0.01,
p<0.05,
p<0.1
SOURCE Authors’ analysis of data from the Centers for Medicare and Medicaid and Irving Levin Associates.
NOTES All columns present results from separate between-market analyses, clustering standard errors at the MSA level. Physician’s average group size is calculated as the average count of physician billing for outpatient care within a TIN, weighting each TIN by its share of total physicians in the MSA. MSA is Metropolitan Statistical Area. TIN is Tax Identification Number. HHI is Herfindahl Hirschman Index.