Table 4.
Results for Tobit model
| Variable | Coefficient | t-ratio |
|---|---|---|
| OPDIPD |
−1.333 |
−3.14 |
| ALOS |
0.152 |
3.91 |
| POP |
0.145 |
0.47 |
| REGION |
0.068 |
0.22 |
| Constant |
−0.249 |
−0.68 |
| Sigma |
0.412 |
|
| |
8 left-censored observations at Ineff ≥ 0 |
|
| |
11 uncensored observations |
|
| Observations summary |
0 right-censored observations |
|
| Number of observations |
19 |
|
| χ2(4) |
16.98 |
|
| Prob > χ2 |
0.0019 |
|
| Pseudo R2 | 0.457 | |
Notes: The critical t-value for 15 degrees of freedom and a 5% two-tailed level of significance is 2.131 is less than computed t-ratios for OPDIPD and ALOS, so we can reject the null hypothesis of no effect in these cases and conclude that the two are statistically significant variables in explaining expected hospital inefficiency.