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Table 10 Probit model addressing potential endogeneity (unmatched samples)

From: Can producer groups improve technical efficiency among artisanal shrimpers in Nigeria? A study accounting for observed and unobserved selectivity

Ā 

EXTENSION

CREDIT

Coeff

Coeff

AGE

ā€‰āˆ’ā€‰0.02

(0.19)

ā€‰āˆ’ā€‰0.01

(0.01)

EXPEREIENCE

0.04**

(0.02)

0.01

(0.01)

EDUCYEAR

0.05

(0.04)

0.05**

(0.02)

REPEAT

0.20

(0.24)

0.07

(0.16)

FEMLABSHR

ā€‰āˆ’ā€‰0.08

(0.12)

0.10

(0.06)

FEMAS

0.76**

(0.32)

0.18

(0.21)

AKWA-IBOM

ā€‰āˆ’ā€‰0.64

(0.56)

ā€‰āˆ’ā€‰1.55***

(0.37)

ONDO

Ā 

ā€‰āˆ’ā€‰0.19

(0.20)

MOBILE

Ā 

ā€‰āˆ’ā€‰0.60**

(0.26)

EXTENSION

Ā 

ā€‰āˆ’ā€‰0.47

(0.40)

CREDIT

ā€‰āˆ’ā€‰0.69*

(0.40)

Ā 

CUSTOMERS

0.01

(0.08)

ā€‰āˆ’ā€‰0.07

(0.05)

SHOCK

ā€‰āˆ’ā€‰0.12

(0.30)

0.80***

(0.20)

TAROAD

0.28

(0.43)

0.65**

(0.30)

LEADER

0.48

(0.38)

ā€‰āˆ’ā€‰0.33

(0.27)

COOP

0.63*

(0.42)

0.70***

(0.25)

UsefulExtension

4.30**

(1.59)

Ā 

Creditworthiness

Ā 

ā€‰āˆ’ā€‰0.71***

(0.18)

Constant

ā€‰āˆ’ā€‰3.00***

(0.86)

ā€‰āˆ’ā€‰0.65

(0.54)

Log-likelihood

ā€‰āˆ’ā€‰49.59

154.86

LR chi2(14 and 16)

43.03

77.68

Number of obs

353

353

  1. ***pā€‰<ā€‰0.01, **pā€‰<ā€‰0.05, *pā€‰<ā€‰0.1. ONDO and MOBILE were dropped in extension model because they perfectly predicted failure to access extension. Standard errors are presented in parentheses
  2. Source: Authorsā€™ calculation based on survey data