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Agricultural and Food Economics

Table 4 Conventional and selection SPF based on unmatched observation

From: Impact of off-farm activities on technical efficiency: evidence from maize producers of eastern Ethiopia

 

Conventional SPF

Selection

Pooled

Participant

Non-participant

Participant

Non-participant

Coef

se

Coef

se

Coef

se

Coef

se

Coef

se

Cons

5.568***

0.756

5.011***

0.000

5.615***

0.917

5.92418***

0.4524

4.96669***

0.667

Value_fertilizer

0.003***

0.001

0.003***

0.000

0.003***

0.001

.00267***

0.0003

.00406***

0.001

Value_seed

0.558***

0.173

0.579***

0.000

0.572***

0.212

.40810***

0.0964

.72837***

0.152

Value_labor

0.012

0.023

0.076***

0.000

− 0.003

0.030

.05214***

0.0098

− 0.00711

0.029

Land_maize

0.410**

0.174

0.315***

0.000

0.415*

0.212

.49672***

0.1002

.25527*

0.152

Off_farm

− 0.002

0.015

        

Sigma

0.091***

0.007

0.033***

0.005

0.106***

0.010

    

Sigma(u)

      

.21502***

0.0033

.42371***

0.014

Sigma(v)

      

.01373**

0.0059

.04182***

0.012

Rho(w,v)

      

.96882***

0.0905

− 0.40401

1.579

  1. *Significance at 10% level
  2. **Significance at 5% level
  3. ***Significance at 1% level
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