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Table 5 Es timates of the Stochastic Revenue Frontier and inefficiency model

From: Off-farm labour supply and production efficiency of farm household in rural Southwest Nigeria

 

OLS estimates

ML Estimates

Coefficient

t-ratio

Coefficient

t-ratio

Conditional revenue frontier

Constant

1.6742

0.53

9.5649***

7.21

LNPCAS

0.5010***

2.78

0.1074

0.86

LNPMAIZE

0.3527*

1.79

0.2384

1.52

LNPYAM

−0.4067**

−2.16

−0.0534

−0.38

LNPEGGS

1.4744***

3.57

0.2035

0.68

LNPPOIL

0.1742

0.74

0.4268**

2.71

LNCLAND

0.3815***

9.42

0.7075***

15.92

LNTLAND

0.1795***

7.86

−0.0309

−0.79

LNANU

0.0595**

1.97

0.0836***

3.82

LNFERT

0.0103

0.37

0.0286

1.57

LNTRACT

0.0667*

1.85

0.0370

1.47

LNMATCOS

0.0145*

1.66

0.0050

0.77

LNHRLAB

0.0264***

2.98

0.0112**

2.05

LNADLAB

0.2326***

3.28

0.1128***

2.89

LNCHLAB

0.0272**

2.01

−0.0054

−0.48

Inefficiency equation

Constant

  

0.2696***

4.31

GENDER

  

−0.0719

−0.98

NATIVITY

  

−0.0351

−0.85

HIGHEDU

  

−0.0012

−0.22

YOUTHFAC

  

0.0114

0.19

GENDERFA

  

−0.0482

−0.74

PTREE

  

−1.7265***

−7.43

PFREHOLD

  

0.1471***

2.78

SIMPSON

  

0.2182***

3.08

DISTANCE

  

0.0028

0.25

ASSETINC

  

−3.3e-7*

−1.66

REMITTA

  

0.4257

0.95

LOANGOT

  

−6.8e-7

−1.27

POFFFARM

  

−0.1595***

−15.24

Sigma squared

0.2169

 

0.0661***

9.43

Gamma

  

0.99***

17702

Log likelihood function

−129.73

 

−12.03

 

LR test of one sided error

  

235.4

 
  1. NOTE: ***, ** and * imply the associated coefficients are significant at 1%, 5% and 10% levels respectively.