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Table 4 The results of stochastic frontier normal/truncated-normal model

From: Analysis of technical efficiency in maize production in Guji Zone: stochastic frontier model

Stoc. Frontier normal/truncated-normal model Number of obs = 234
Wald chi2(7) = 1034.75
Log likelihood = 97.535577 Prob > chi2 = 0.0000
lnMPH Coef Std. Err Z P > z [95% Conf Interval]
lnMPH
 lnFRH*** 0.3056592 0.0484493 6.31 0.000 0.2107003 0.4006182
 lnMWR** 0.1061715 0.0495665 2.14 0.032 0.009023 0.2033201
 lnMPR*** 0.1824448 0.0609982 2.99 0.003 0.0628906 0.301999
 lnOHH*** 0.2316195 0.0523811 4.42 0.000 0.1289544 0.3342847
 lnMHH** 0.0971334 0.0459175 2.12 0.034 0.0071368 0.1871301
 lnMIH*** 0.1048717 0.038228 2.74 0.006 0.0299461 0.1797973
 lnLMZ*** 0.9209692 0.0371639 24.78 0.000 0.8481293 0.9938091
_cons 0.0442006 0.2631521 0.17 0.867 −0.471568 0.5599693
mu
 SEX* −0.7442135 0.4121561 −1.81 0.071 −0.0635977 1.552025
 AGE** −0.0202774 0.0102945 −1.97 0.049 −0.0404541 −0.0001006
 EDU −0.0165539 0.0154354 −1.07 0.284 −0.0468068 0.0136991
 TNR** −0.0729732 0.0294028 −2.48 0.013 −0.0153448 −0.1306016
 INC*** −4.70e−06 1.28e−06 −3.66 0.000 −7.21e−06 −2.18e−06
 ROW* −2.356616 1.314223 −1.79 0.073 −4.932445 0.219213
 CRD** −0.012532 0.0057474 −2.18 0.029 −0.0012674 0.0237966
 EXV 0.4646291 0.3606043 1.29 0.198 −0.2421423 1.171401
 NAL* −0.2381318 0.1410953 −1.69 0.091 −0.5146734 0.0384098
 LSH** 0.3566474 0.1598629 2.23 0.026 0.043322 0.6699729
 IMD** −1.529624 0.6312622 −2.42 0.015 −2.766875 −0.2923727
 DFM 0.3126582 0.4873519 0.64 0.521 −0.6425339 1.26785
 NLV* −0.0066951 0.040,327 −1.66 0.097 −0.014599 0.0012089
 _cons*** 0.4632954 0.094953 4.88 0.000 0.2771907 0.6494001
 /lnsigma2 −2.737034 0.185183 −15.68 0.000 −3.363453 −2.637549
 /ilgtgamma −0.0194481 0.4361717 −0.02 0.983 −0.864329 0.8454328
 sigma2 (\({\sigma }_{S}^{2}={\sigma }_{u}^{2}+{\sigma }_{v}^{2}\)) 0.0647621 0.0092151    0.0346155 0.0715364
 Gamma (\(\gamma =\frac{{\sigma }_{u}^{2}}{{\sigma }_{S}^{2}}\)) 0.61399337 0.1090405    0.2964357 0.6996082
 sigma_u2 0.0397635 0.0097377    0.0056779 0.0438491
 sigma_v2 0.0249986 0.0024699    0.0201577 0.0298395
\(lamda(\lambda )=\frac{{\sigma }_{u}}{{\sigma }_{v}}=\frac{0.1994 }{0.1581}=1.2612271\)
  1. *, **, and *** means significant at 10, 5, and 1%, respectively
  2. Source: Own survey result.