Table 5 MLE of the Cobb–Douglas SFP with various distributions of inefficiency term
From: Analysis of technical efficiency in maize production in Guji Zone: stochastic frontier model
Variable | Truncated normal distribution | Exponential distribution | Half normal distribution |
|---|---|---|---|
logMZO | |||
logFRH | 0.26212167*** 0.050 | 0.26210081*** 0.050 | 0.26504656*** 0.050 |
logMWR | 0.08555118 0.051 | 0.08555151 0.051 | 0.08578216 0.052 |
logMPR | 0.23795927*** 0.063 | 0.23796861*** 0.063 | 0.24015062*** 0.063 |
logOHH | 0.27597429*** 0.053 | 0.27596657*** 0.053 | 0.27548877*** 0.053 |
logMHH | 0.11967841* 0.048 | 0.11967462* 0.048 | 0.11629394* 0.048 |
logMIH | 0.1169028** 0.040 | 0.11696768** 0.040 | 0.11222277** 0.040 |
logLMZ | 0.88538574*** 0.037 | 0.88538586*** 0.037 | 0.88488959*** 0.037 |
_cons | −0.00900501 0.269 | −0.00940861 0.269 | 0.04560349 0.269 |
Mu | |||
_cons | −28.857753 | ||
Ilgtgamma | |||
_cons | 4.6645695 | ||
lnsigma2 | |||
_cons | 0.86329367 | ||
lnsig2v | |||
_cons | −3.8095515*** | −3.7442453*** | −3.7442453*** |
lnsig2u | |||
_cons | −5.037093*** | −3.9101573*** | −3.9101573*** |
Legend | *p < 0.001 | ||
H0: No inefficiency component: z = −1.041 Prob < = z = 0.049 | Likelihood-ratio test of sigma_u = 0: chibar2(01) = 1.68 Prob > = chibar2 = 0.027 | Likelihood-ratio test of sigma_u = 0: chibar2(01) = 1.16 Prob > = chibar2 = 0.014 | |