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Table 2 Descriptive statistics of key variables in the matching procedure

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

Variables

Unmatched

Matched

MEM

CONN

Diff

MEM

CONN

Diff

Mean

Mean

Mean

Mean

TOTALCAP

56,262.54

44,962.97

11,299.56***

55,891

44,735

11,156**

Inputs

ENGINEOPER

1.63

1.43

0.20**

1.64

1.42

0.22*

FUELCOST

200,483.40

174,351.80

26,131.60**

203,116

180,000

23,116

USEFULSEINE

2.28

2.14

0.14

2.25

2.08

0.17

LEADERSEMP

0.95

0.60

0.35***

0.93

0.61

0.32**

HELPERSEMP

1.34

0.91

0.43***

1.32

1.01

0.32**

Variables in the matching procedure

AGE

43.87

38.83

5.04***

43.67

43.26

0.41

EXPERIENCE

21.11

16.03

5.07***

20.84

20.39

0.45

EDUCYEAR

8.67

8.10

0.56

8.66

8.56

0.10

REPEAT

0.04

0.12

ā€‰āˆ’ā€‰0.07

0.04

0.02

0.02

FEMLABSHR

1.27

1.35

ā€‰āˆ’ā€‰0.08

1.25

1.14

0.11

FEMAS

0.41

0.15

0.26***

0.39

0.43

ā€‰āˆ’ā€‰0.04

AKWA-IBOM

0.18

0.19

ā€‰āˆ’ā€‰0.01

0.19

0.18

0.01

ONDO

0.11

0.41

0.30***

0.11

0.12

ā€‰āˆ’ā€‰0.01

MOBILE

0.94

0.88

0.06*

0.94

0.93

0.01

EXTENSION

0.14

0.02

0.12***

0.13

0.06

0.09

CREDIT

0.33

0.21

0.12**

0.30

0.33

ā€‰āˆ’ā€‰0.03

CUSTOMERS

2.38

2.58

0.20

2.40

2.13

0.27

SHOCK

0.64

0.69

ā€‰āˆ’ā€‰0.05

0.64

0.67

ā€‰āˆ’ā€‰0.03

TAROAD

0.36

0.22

0.14***

0.36

0.31

0.05

LEADER

0.08

0.14

ā€‰āˆ’ā€‰0.06

0.09

0.10

ā€‰āˆ’ā€‰0.01

COOPa

0.24

0.07

0.18***

0.23

0.26

ā€‰āˆ’ā€‰0.03

Observations

95

258

Ā 

92

258

Ā 
  1. aThis is a traditional form of cooperation whereby fishers and non-fishers contribute to informal savings and credit associations for their mutual benefit. It represents a more generic form of cooperative association at the local level and captures the social participation of fishers in other groups
  2. *pā€‰<ā€‰0.1; **pā€‰<ā€‰0.05; ***pā€‰<ā€‰0.01
  3. Source: Authorsā€™ calculation based on survey data