Table 12. Regression results using charge-based and cost-based case-mix indexes in a single equation average cost function.
| Variable | Coefficient | t-Statistics |
|---|---|---|
| Results using charge-based case-mix index | ||
| Case-mix index | .969 | 23.4 |
| Wage index | 1.022 | 27.5 |
| Resident to bed ratio | .545 | 11.9 |
| Bed size | .117 | 23.8 |
| Large city dummy | .109 | 7.8 |
| Medium city dummy | .025 | 2.2 |
| Small city dummy | .000 | 0.0 |
| Constant | 7.334 | — |
| Adjusted R2 = .72 | ||
| Standard error of estimate = .22 | ||
| Results using cost-based case-mix index | ||
| Case-mix index | 1.012 | 23.3 |
| Wage index | 1.023 | 27.5 |
| Resident to bed ratio | .580 | 12.7 |
| Bed size | .119 | 24.4 |
| Large city dummy | .109 | 7.8 |
| Medium city dummy | .026 | 2.3 |
| Small city dummy | .001 | 0.0 |
| Constant | 7.322 | — |
| Adjusted R2 = .72 | ||
| Standard error of estimate = .22 | ||