122
METODOLOGÍA PARA ESTIMAR EL USO EFICIENTE DEL AGUA EN ACTIVIDADES AGRICOLAS
----------------------------------------------------------------------------------------------------------------------------------------------
Producto |
Coef.
Std. Err.
z
P>|z|
[95% Conf. Interval]
Agua
+ 2.078707 .1629267
12.76
0.000 1.748879
2.408534
_cons
|
4400.421 1099.883
4.00
0.000 2173.824
6627.017
-------------- + ----------------------------------------------------------------------------------------------------------------------
sigma_u |
3154.8532
sigma_e |
4867.424
rho
|
.29582773 (fraction of variance due to u_i)
----------------------------------------------------------------------------------------------------------------------------------------------
F test that all u_i=0: F(7, 38) = 1.49 Prob > F = 0.1986
MODELO PARA LA PRODUCCIÓN DE TRIGO, CON DATOS DE PANEL
ORDENADO POR MODULO Y POR AÑO.
xtset Modulo Año
panel variable : Modulo (unbalanced)
time variable : Año, 2009 to 2014, but with gaps
delta : 1 unit
xtreg Producto Agua, fe
Fixed-effects (within) regression
Number of obs
= 29
Group variable: Modulo
Number of groups
= 8
R-sq: within = 0.4877
Obs per group: min = 3
between = 0.7173
avg
= 3.6
overall = 0.6201
max
= 4
F(1,20)
= 19.04
corr(u_i, Xb) = 0.2900
Prob > F
= 0.0003
----------------------------------------------------------------------------------------------------------------------------------------------
Producto |
Coef.
Std. Err.
z
P>|z|
[95% Conf. Interval]
Agua
+ .7598047 .1741283
4.36
0.000
.3965795
1.12303
_cons
|
6351.717 3215.954
1.98
0.062
-356.645
13060.08
-------------- + ----------------------------------------------------------------------------------------------------------------------
sigma_u |
7488.1594
sigma_e |
8451.6889
rho
|
.43977222 (fraction of variance due to u_i)
----------------------------------------------------------------------------------------------------------------------------------------------
F test that all u_i=0: F(7, 20) = 2.69 Prob > F = 0.0389
