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The Official Journal of the Pan-Pacific Association of Input-Output Studies (PAPAIOS)

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Table 5 Maximum likelihood estimates of technical inefficiency determinants

From: Estimation of technical efficiency of black cumin (Nigella sativa L.) farming in northwest Ethiopia: a stochastic frontier approach

Variables Parameters Coefficient Std. err T-ratio
Constant \(\delta_{0}\) 11.935*** 2.497 4.779
Age \(\delta_{1}\) 0.010** 0.004 2.299
Education status \(\delta_{2}\) − 0.134 0.108 − 1.242
Tropical livestock unit \(\delta_{3}\) 0.002 0.016 0.137
Land size allotted to cumin \(\delta_{4}\) 0.073 0.276 0.265
Market price \(\delta_{5}\) − 1.440*** 0.312 − 4.611
Land fragmentation \(\delta_{6}\) − 0.024 0.133 − 0.180
Soil fertility \(\delta_{7}\) − 0.121 0.175 − 0.689
Extension service \(\delta_{8}\) − 0.274* 0.145 − 1.887
Distance to farm plot \(\delta_{9}\) 0.074*** 0.026 2.846
Log likelihood function   − 91.247   
  1. ***, ** and * are statistically significant at 1%, 5% and 10%, respectively