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Table 2 Descriptive statistics—matched sample

From: Correcting for sample selection in stochastic frontier analysis: insights from rice farmers in Northern Ghana

Variable Pooled Irrigated farms Rainfed farms Test of meansa
Mean SD Mean SD Mean SD
Age 38.43 10.66 40.29 11.92 37.12 9.47 3.425d
Sex 0.83 0.38 0.87 0.34 0.81 0.4 1.804b
HH head 0.57 0.5 0.60 0.49 0.56 0.5 0.87
Education 4.04 5.13 3.86 5.52 4.17 4.84 − 0.692
Commercial 0.65 0.48 0.64 0.48 0.65 0.48 − 0.304
Experience 11.73 7.68 12.48 8.16 11.19 7.28 1.931b
Region 0.68 0.47 0.84 0.37 0.57 0.50 6.821d
FBO 0.64 0.48 0.58 0.50 0.68 0.47 − 2.328d
Extension 0.54 0.50 0.43 0.50 0.63 0.48 − 4.735c
Credit 0.12 0.32 0.07 0.26 0.15 0.36 − 2.767d
Training 0.72 0.45 0.91 0.29 0.58 0.49 8.866d
CC perception 0.67 0.47 0.86 0.35 0.53 0.50 8.311d
HH size 9.33 6.24 9.28 6.65 9.37 5.94 − 0.163
Farm size 2.41 3.64 1.29 1.00 3.20 4.51 − 6.21d
Output 31.07 47.19 21.98 16.02 37.5 59.39 − 3.804d
Herbicide 3.26 8.66 2.28 1.33 3.96 11.21 − 2.221d
Fertilizer 6.39 37.9 3.47 6.26 8.45 49.17 − 1.505
Seed 54.88 108.38 15.93 26.16 82.46 133.28 − 7.353d
Labour 16.87 16.37 25.16 17.86 11 12.21 10.92d
Obs 538 223 315  
  1. at test is used to determine if the sample means are significantly different between the irrigated and rainfed farms
  2. b, c and d represent 10%, 5% and 1% level of significance, respectively
  3. Source: Analysis of field data, 2017