Deterministic frontier

Inputs/Attributes

Coefficient

Std. err.

Quantity of irrigation water (m³/ha)

0.0074

0.0055

Wheat area (Ha)

0.0277

(0.0106)***

N (kg/Ha)

0.1225

(0.0139) ***

P (kg/Ha)

0.0756

(0.0085)***

seed (kg/Ha)

0.1344

(0.0297)***

Labor (hour)

0.0702

(0.0166)***

Constant

6.6405

(0.1400)***

Risk function

Soil salinity (0 = Low and 1 = High)

0.0934

(0.0305)***

Wheat area (Ha)

−0.0003

0.0014

N (kg/Ha)

−0.0002

(0.0001)*

P (kg/Ha)

0.0019

0.0034

Wheat variety (0 = Local and 1 = Improved)

−0.9128

(0.4970)*

Labor (hour)

−0.0004

0.0037

Surface Supplemental irrigation (0 = No and 1 = Yes)

0.0463

(0.0261)*

Improved supplemental irrigation (0 = No and 1 = Yes)

−0.1378

(0.0400)***

Constant

−5.4658

(0.4840)***

Mean function of inefficiency

Farmer age (year)

−0.0007

0.0045

years of schooling (year)

−0.0786

(0.0155)***

Farm size (Ha)

−0.0030

0.0094

Soil salinity (0 = Low and 1 = High)

0.6098

(0.2246)***

Wheat variety (0,1)

−0.0152

0.1672

Surface Supplemental irrigation (0 = No and 1 = Yes)

−0.3646

(0.1999)*

Improved supplemental irrigation (0 = No and 1 = Yes)

−0.9111

(0.3573)***

Constant

−2.4218

(0.2888)***

Log likelihood

276.8000