Table 5.
Tobit regression results for OD efficiency and policy/area characteristics (CRS and VRS, without expenditure)
| CRS | VRS | ||||
|---|---|---|---|---|---|
| Coef. | z | Coef. | z | ||
| Year | |||||
| 2009 | 0.08 | 2.24* | 0.11 | 2.41** | |
| 2010 | 0.17 | 4.76 | 0.13 | 2.77*** | |
| 2011 | 0.15 | 4.11*** | 0.11 | 2.41** | |
| Policies | |||||
| Vouchers only | 0.04 | 0.41 | −0.05 | −0.40 | |
| HEF only | 0.11 | 1.74** | −0.03 | −0.40 | |
| HEF + vouchers | 0.16 | 2.24** | 0.00 | 0.05 | |
| HEF + vouchers with SOA | 0.26 | 2.99*** | 0.16 | 1.52 | |
| Population Density | |||||
| 2 | 0.01 | 0.09 | −0.02 | −0.29 | |
| 3 | −0.04 | −0.23 | −0.03 | −0.18 | |
| 4 | 0.16 | 1.45** | 0.09 | 0.74 | |
| Province | |||||
| Kampong Cham | 0.16 | 1.88*** | 0.14 | 1.66 | |
| Kampot | −0.19 | −1.97 | |||
| Kandal | 0.11 | 1.29*** | 0.12 | 1.37 | |
| Stung Treng | −0.27 | −1.76 | −0.25 | −1.62 | |
| Constant | 0.46 | 5.45*** | 0.69 | 7.90 | |
| Observations | 92.00 | 92.00 | |||
* p < 0.1, ** p < 0.05, *** p < 0.01