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

Table 8 The econometric parameters estimation results of the C–D and OLS.

From: Analysis of technical efficiency of potato (Solanum tuberosum L.) production in Chilga District, Amhara National Regional State, Ethiopia

Variable

Parameter

Ordinary least squares

Maximum likelihood estimate

Coefficient

t-ratio

Coefficient

t-ratio

Intercept

\( \beta_{0} \)

6.85

8.43***

13.21

72.79***

LnArea

\( \beta_{1} \)

0.17

1.64

0.05

0.36

LnDAP

\( \beta_{2} \)

0.14

1.01

0.13

2.62**

LnUREA

\( \beta_{3} \)

0.05

0.42

− 0.05

− 0.72

LnODE

\( \beta_{4} \)

0.19

2.93***

0.16

3.54***

LnMDE

\( \beta_{5} \)

− 0.08

− 1.26

− 0.038

− 3.11***

LnSD

\( \beta_{6} \)

0.18

2.04**

− 0.515

− 5.97***

Inefficiency effect model

 Constant

   

18.29

8.28***

 Age

   

− 8.32

− 7.21***

 Educ

   

0.05

0.23

 HHsze

   

− 0.06

− 0.27

 Variety

   

− 0.28

− 1.67*

 DAPtime

   

− 0.33

− 1.45

 Ureatime

   

0.07

0.27

 SDtime

   

− 0.06

− 0.305

 Soilcsn

   

− 0.14

− 0.66

 Freqcnt

   

0.06

0.53

 Trngprdn

   

0.19

1.13

 Trngmkt

   

− 0.099

− 0.38

 Credit

   

0.075

0.41

 Dismkt

   

0.54

3.26***

 TLU

   

0.12

0.81

 Off

   

0.12

0.59

Variance parameters

 Sigma-squared

\( \sigma^{2} \)

  

0.37

6.51***

 Gamma

\( \varGamma \)

  

0.99

59,138,266***

 Log likelihood function

 

− 121.34498

 

− 91.273621

 

 LR

   

60.142728

 

 Return to scale

   

− 0.263

 

 Total sample size

\( N \)

150

 

150

 
  1. ***, ** and * represents significance at 1%, 5% and 10% probability levels, respectively