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Table 2 Parameter estimates of stochastic production frontier and technical inefficiency models

From: A stochastic frontier analysis of technical efficiency of fish cage culture in Peninsular Malaysia

Variable

Parameter

Coefficients

Standard error

Stochastic production frontier

 Constant

β0

1.1236*

0.4424

 Ln seed (fish fry)

β1

0.3984***

0.1157

 Ln (Feed)

β2

0.1897*

0.0761

 Ln (Labour)

Β3

0.3239***

0.1194

 Ln (Operational costs)

β4

−0.0714

0.0736

 Ln (Energy)

β5

0.0869

0.0799

 Ln (Other inputs)

β6

−0.0435

0.1009

Technical inefficiency model

 Constant

δ0

0.4535

0.1729

 Age (no. of years) of respondent

δ1

−0.0029

0.0025

 Experience (no. of years)

δ2

−0.0028

0.0042

 Cage area (m−2)

δ3

−0.0177

0.0169

 Education (level)

δ4

−0.0024

0.0074

 Production cycle (number)

δ5

−0.1099**

0.0349

Variance parameter

 Sigma-square σ 2 s  = σ 2 u  + σ 2 v

 

1.9947**

0.0187

 Gamma γ = σ 2 u /σ 2

 

0.9774***

3.0008

 Log likelihood

 

−118.86

 

 Mean of exp (−Ui)

 

0.37

 
  1. *** Estimates are significant at 1 %, ** significant at 5 %, * significant at 10 %