An Economic Assessment of Banana Genetic Improvement and ...

BANANA PRODUCTIVITY AND TECHNICAL EFFICIENCY IN UGANDA 117
Table 8.2 Results of the frontier function
Overall sample Low elevation High elevation
Variable Eq1 Eq2 Eq3 Eq1 Eq2 Eq3 Eq1 Eq2 Eq3
N 512 512 512 374 374 374 138 138 138
Constant 5.79***
(18.99)
ln(A) 0.332***
(8.04)
ln(L) 0.384***
(8.87)
5.158***
(13.73)
0.207***
(3.44)
0.489***
(8.64)
4.262***
(5.27)
–0.211
(–0.77)
0.864***
(3.49)
ln(A) 2 –0.065**
(–2.47)
ln(L) 2 –0.038*
(–1.85)
ln(L) × ln(A) 0.065***
L/A –0.0001***
M 3 × 10 –5 *
(1.84)
G 1 × 10 –5
(0.47)
C 2 × 10 –5
(1.15)
farm size 0.008*
(1.68)
Ext 0.026
(1.2)
plotage 0.017***
(3.2)
plotage 2 –0.0001
(–1.56)
Sigatoka –0.21
(–1.59)
weevils –0.035
(–0.34)
High elevation 0.54***
(5.12)
(–2.82)
3 × 10 –5 *
(1.86)
1 × 10 –5
(0.48)
2 × 10 –5
(1.14)
0.008*
(1.70)
0.024
(1.14)
0.017***
(3.21)
–9 × 10 –5
(1.54)
–0.204
(–1.56)
–0.063
(–0.60)
0.52***
(4.98)
(1.71)
3 × 10 –5 **
(1.99)
2 × 10 –5
(0.75)
3 × 10 –5
(1.38)
0.01*
(1.95)
0.025
(1.18)
0.018***
(3.38)
–9 × 10 –5 *
(–1.66)
–0.214
(–1.64)
–0.088
(–0.83)
0.523***
(5.23)
5.694***
(15.75)
0.332***
(6.45)
0.395***
(7.87)
8 × 10 –5 **
(2.00)
–1 × 10 –5
(–0.16)
2 × 10 –5
(0.40)
0.002
(0.36)
–0.009
(–0.35)
0.028***
(3.00)
–0.0003**
(–2.03)
–0.183
(–1.18)
0.049
(0.36)
5.064***
(11.32)
0.206***
(2.81)
0.5***
(7.55)
–7 × 10 –5 **
(–2.39)
8 × 10 –5 **
(2.08)
–1 × 10 –5
(–0.2)
1 × 10 –5
(0.3)
0.002
(0.36)
–0.01
(–0.36)
0.027***
(2.82)
–0.0002*
(–1.71)
–0.167
(–1.08)
0.012
(0.09)
4.279***
(4.45)
–0.233
(–0.68)
0.812***
(2.69)
–0.064*
(–1.93)
–0.031
(–1.19)
0.069
(1.45)
8 × 10 –5 **
(2.06)
–1 × 10 –5
(–0.17)
2 × 10 –5
(0.42)
0.003
(0.55)
–0.01
(–0.38)
0.028***
(2.87)
–0.002*
(1.69)
–0.17
(–1.09)
–0.0009
(–0.01)
6.637***
(14.52)
0.264***
(5.79)
0.282***
(4.24)
2 × 10 –5
(2.77)
2 × 10 –6 *
(1.66)
3 × 10 –5 **
(2.58)
0.014**
(2.21)
0.134***
(4.83)
0.0153***
(3.68)
–7 × 10 –5 **
(–1.77)
–0.737
(–1.59)
–0.161
(–1.53)
6.259***
(9.68)
0.199**
(2.19)
0.343***
(3.43)
–3 × 10 –5
(–0.82)
2 × 10 –5 ***
(2.82)
2 × 10 –5 *
(1.74)
3 × 10 –5 ***
(2.6)
0.014**
(2.22)
0.135***
(4.82)
0.0148***
(3.55)
–7 × 10 –5 *
(–1.72)
–0.742
(1.6)
3.526
(0.78)
0.065
(0.10)
1.189
(0.93)
–0.096**
(–2.06)
–0.065
(–0.72)
0.013
(0.13)
2 × 10 –5 ***
(3.18)
3 × 10 –5 **
(2.26)
3 × 10 –5 ***
Log likelihood –624.9 –621.2 –620.6 –500.1 –497.4 –497.7 –51.4 –51.1 –48.2
TE 0.475 0.478 0.474 0.437 0.442 0.44 0.705 0.703 0.706
–0.153
(1.46)
(3.00)
0.016***
(2.61)
0.134***
(4.68)
0.016***
(3.79)
–0.0001*
(–1.86)
–0.744
(–1.61)
–0.172*
Notes: ***, **, * indicate statistical significance at the 1, 5, and 10 percent levels, respectively. Eq1 is the Cobb-Douglas technology, Eq2
is the transcendental production function, and Eq3 the transcendental logarithmic function (translog). See Table 8.1 for definitions of the
variables.
(–1.68)