Table 1. Regression analysis of determinants of real ICF per diem rates, by year: 1979-86.
| Independent variables | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 |
|---|---|---|---|---|---|---|---|---|
| Payment systems | ||||||||
| CONSTANT |
*9.62 (15.6) |
*9.39 (15.6) |
*9.33 (17.5) |
*10.26 (14.7) |
*9.43 (11.1) |
*10.24 (11.7) |
*10.70 (12.0) |
*11.18 (10.6) |
| PFS | 0.65 (0.9) |
0.63 (0.9) |
0.67 (1.0) |
−0.31 (0.4) |
0.87 (1.0) |
0.42 (0.4) |
0.25 (0.3) |
0.08 (0.1) |
| PCL | −0.65 (0.6) |
−0.87 (0.8) |
0.15 (0.2) |
−1.69 (1.6) |
−0.67 (0.6) |
−1.49 (1.3) |
−2.06 (1.9) |
−2.28 (1.8) |
| COM | 0.32 (0.3) |
0.39 (0.4) |
0.41 (0.5) |
−0.17 (0.2) |
1.06 (1.1) |
0.60 (0.6) |
0.80 (0.8) |
0.75 (0.6) |
| R2 | 0.05 | 0.06 | 0.04 | 0.07 | 0.11 | 0.13 | 0.25 | 0.21 |
| SAMPLE | 43 | 44 | 47 | 47 | 47 | 47 | 46 | 46 |
| Payment systems and State variables | ||||||||
| CONSTANT |
**26.70 (2.4) |
*42.46 (3.7) |
*44.90 (4.3) |
*45.82 (4.2) |
*31.19 (2.8) |
*22.63 (2.0) |
15.03 (1.6) |
11.21 (1.1) |
| PFS | 0.41 (0.6) |
0.52 (0.8) |
0.63 (1.0) |
−0.43 (0.6) |
1.52 (1.6) |
0.91 (0.9) |
1.38 (1.4) |
1.34 (1.2) |
| PCL | −0.09 (0.1) |
−0.99 (1.0) |
−0.53 (0.6) |
−1.42 (1.5) |
0.19 (0.2) |
−0.72 (0.6) |
−0.79 (0.7) |
−0.67 (0.5) |
| COM | 0.53 (0.6) |
0.84 (1.0) |
0.74 (1.0) |
−0.14 (0.2) |
1.58 (1.6) |
1.02 (1.0) |
1.68 (1.6) |
1.75 (1.4) |
| POP65 |
*−0.54 (3.7) |
−0.19 (1.5) |
**−0.28 (2.0) |
**−0.30 (2.3) |
0.05 (0.4) |
0.17 (1.4) |
0.09 (0.7) |
0.02 (0.2) |
| DRS |
**0.02 (2.2) |
**0.02 (2.3) |
**0.02 (2.5) |
*0.02 (2.7) |
*0.02 (3.0) |
0.01 (1.6) |
0.01 (1.8) |
*0.02 (2.1) |
| HOSP |
**−0.05 (2.2) |
−0.02 (1.0) |
−0.02 (0.9) |
−0.06 (1.3) |
−0.00 (0.1) |
0.01 (0.40) |
0.01 (0.6) |
0.00 (0.2) |
| LIFEX | −0.54 (0.9) |
*−1.77 (2.9) |
*−1.56 (2.7) |
*−1.77 (3.0) |
**−1.25 (2.2) |
−0.96 (1.5) |
−0.41 (0.8) |
−0.21 (0.4) |
| UNEMP |
**0.50 (2.1) |
−0.22 (1.1) |
−0.29 (1.7) |
−0.13 (0.9) |
−0.16 (1.2) |
−0.17 (1.1) |
−0.24 (1.5) |
−0.17 (1.0) |
| INCOME | −0.92 (0.8) |
−0.65 (0.7) |
*−1.66 (2.1) |
−0.34 (0.4) |
−1.30 (1.3) |
−0.18 (0.3) |
−0.43 (0.6) |
−0.16 (0.2) |
| R2 | 0.51 | 0.41 | 0.45 | 0.49 | 0.39 | 0.32 | 0.45 | 0.45 |
| SAMPLE | 43 | 44 | 47 | 47 | 47 | 47 | 46 | 46 |
*
Significant at 0.01 level.
**
Significant at 0.05 level.
NOTES: Absolute value of t-statistic in parentheses. ICF is intermediate care facility.
SOURCE: (Swan, Harrington, and Grant, 1988); Statistical Abstract of the United States, 1980-1988 annual issues; American Medical Association, Physician Characteristics and Distribution in the U.S., 1981-1988 annual issues; American Hospital Association, Hospital Statistics, 1980-1987 annual issues.