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Table 1 Descriptive statistics of variables in the Stochastic Revenue Frontier and inefficiency equation

From: Off-farm labour supply and production efficiency of farm household in rural Southwest Nigeria

Variable Definition of variables Mean Std. error
Variables in the conditional revenue function
ADLAB Number of economically active adults 2.88 0.23
CHLAB Number of children (<18 years) supporting household income generating activities 1.44 0.10
HRLAB Hired labour cost (N) 25,823.34 2,336.35
FSIZECRP Size of arable crop farm (Ha) 1.27 0.02
FSIZETRE Size of tree crop farm (Ha) 0.57 0.01
ANU Size of livestock farm (Animal unit) 0.34 0.08
FERT Quantify of fertilizer (50 kg Bags) 0.96 0.16
TRACTDAY Tractor services used (Workdays) 0.45 0.05
MATCOS Cost of other intermediate materials (N) 11,710.26 1,774.14
PGARRI Price of garri (N/kg) 80.43 1.32
PMAIZE Price of maize grain (N/kg) 80.07 1.13
PYAM Price of yam (N per dozen tubers) 1,110.48 16.11
PEGGS Price of eggs (N/tray) 345.51 2.24
POIL Price of palm oil (N/litre) 91.18 1.12
Variables in the production inefficiency equation
GENDER Household head is a female (Yes =1, No = 0) 0.08 0.02
NATIVITY Household head is non-native (Yes =1, No = 0) 0.19 0.03
HIGHEDU Years of schooling by the most educated worker in the household 7.95 0.31
YOUTHFAC Proportion of youths (30 years) in household 0.52 0.03
GENDERFA Proportion of females in the household 0.41 0.03
PTREE Proportion of farmland devoted to tree crops 0.30 0.02
PFREHOLD Proportion of farmland on freehold 0.62 0.03
SIMPSON Simpson index measure of farm fragmentation 0.39 0.02
DISTANCE Average distance of farm parcels from home 3.18 0.15
ASSETINC Asset income 39,083.86 4,141.02
REMITTA Remittances: income received from rural out-migrants 35,401.28 3,198.20
LOANGOT Amount of credits accessed 7,471.43 2,528.83
POFFFARM Proportion of household income derived from off-farm activities 0.22 0.02
  1. SOURCE: Computed from survey data, 2006.