Parameter Estimates of the Stochastic Production Frontier and Technical Inefficiency Models for VHLSS Data, 2004 (Equations [12] and [13])
| Coefficient | T-Ratio | |
|---|---|---|
| Stochastic Production Frontier Model | ||
| Constant | 6.40 (0.072) | 89.50 |
| Capital rented (KR) (ln) | 0.09 (0.006) | 17.30 |
| Labor (LAB) (ln) | 0.03 (0.006) | 4.79 |
| Hired labor (HLAB) (ln) | 0.02 (0.003) | 7.84 |
| Land (LAN) (ln) | 0.52 (0.009) | 56.76 |
| Fertilizer (F) (ln) | 0.16 (0.006) | 27.47 |
| Pesticide (P) (ln) | 0.08 (0.005) | 16.92 |
| Mekong River Delta (MRD) | 0.21 (0.022) | 9.80 |
| Technical Inefficiency Model | ||
| Constant | -2.28 (0.562) | -4.06 |
| Education (ED) | -0.07 (0.015) | -4.62 |
| Fragmentation (FRAG) | 0.25 (0.100) | 2.48 |
| Ratio of land with LUC (CERT) | -0.24 (0.075) | -3.19 |
| Soil (SOIL) | 0.48 (0.084) | 5.74 |
| Access to extension services (EXT) | -0.08 (0.041) | -1.98 |
| Credit (CRE) (ln) | -0.07 (0.026) | -2.49 |
| Gamma | 0.88 | 42.55 |
| Sigma squared | 0.52 | 6.02 |
| Log-likelihood | -1,315.25 | |
| Mean efficiency (%) | 77.49 | |
| Number of observations | 3,671 | |
Note: All coefficients are significant at the 0.01 level except access to extension services (EXT), which is significant at the 0.05 level. Standard errors are in parentheses.