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

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

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