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Table 1 Description and summary statistics of key variables

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

Variable Description Mean
Dependent variables
TOTALCAPa Shrimp caught in peak season (kg) 48,003.93
(1821.02)
MEMBERSHIP 1 If shrimpers belong to a fisher group, 0 otherwise 0.27
Input variables used in SPF model
ENGINEOPER Number of outboard engines operated 1.48
(0.79)
FUELCOST Cost of fuel used per week during peak season (Naira) 181,384.00
(121,022.90)
USEFULSEINE Useful life of seine (years) 2.18
(1.41)
LEADERSEMP Number of skippers employed 0.69
(0.91)
HELPERSEMP Number of helpers employed 1.03
(1.02)
Production characteristics  
HIGHENGCAP 1 If engine capacity is above 40 HP, 0 otherwise 0.02
FISHVILL 1 If fishing community is within 1 km radius of other fishing community, 0 otherwise 0.39
Independent variables
AGE Age of respondent (years) 40.20
(11.01)
EXPERIENCE Years of shrimping experience 17.39
(10.75)
EDUCYEAR Years of education 8.50
(4.53)
REPEAT Number of times classes were repeated 0.10
(0.47)
CUSTOMERS Number of major customers 1.33
(1.49)
FEMLABSHR 1 If household female laborer engaged in shrimping activities, 0 otherwise 0.22
FEMAS 1 If household female laborer belonged to a shrimping group, 0 otherwise 0.18
AKWA-IBOMb 1 For Akwa-Ibom, 0 otherwise 0.33
ONDOb 1 For Ondo, 0 otherwise 0.89
MOBILE 1 For mobile phone ownership, 0 otherwise 0.05
EXTENSION 1 If respondent had access to extension, 0 otherwise 0.24
CREDIT 1 If respondent had access to credit, 0 otherwise 0.13
TAROAD 1 If respondent had access to tarmacked road, 0 otherwise 0.26
COOP 1 If respondent participated in local financial cooperative, 0 otherwise 0.11
LEADER 1 If respondent was a skipper, 0 otherwise 0.13
SHOCK 1 If respondent had a shock, 0 otherwise 0.68
Observations   353
  1. aThe dependent variable is the natural log form of total catch. bReference state is Lagos. Standard errors are presented in parentheses
  2. Source: Authors’ calculation based on survey data