Etude des déterminants de l'offre de l'eau potable au Cameroun

ANNEXE TEST DE STATIONNARITE SUR LES VARIABLES INDEPENDANTES

Null Hypothesis: D(CONSO_ADM) has a unit root
Exogenous: Constant
Lag Length: 0 (Automatic based on SIC, MAXLAG=10)
			t-Statistic	Prob.*
Augmented Dickey-Fuller test statistic			-11.67371	0.0000
Test critical values:	1% level		-3.574446
	5% level		-2.923780
	10% level		-2.599925
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(CONSO_ADM,2)
Method: Least Squares
Date: 05/08/12 Time: 23:51
Sample (adjusted): 1962 2009
Included observations: 48 after adjustments
Variable	Coefficient	Std. Error	t-Statistic	Prob.
D(CONSO_ADM(-1))	-1.495368	0.128097	-11.67371	0.0000
C	566.0583	588.4515	0.961946	0.3411
R-squared	0.747635	Mean dependent var		16.60417
Adjusted R-squared	0.742149	S.D. dependent var		8003.000
S.E. of regression	4063.849	Akaike info criterion		19.49842
Sum squared resid	7.60E+08	Schwarz criterion		19.57639
Log likelihood	-465.9621	F-statistic		136.2755
Durbin-Watson stat	2.318943	Prob(F-statistic)		0.000000

Null Hypothesis: CONSO_IND has a unit root
Exogenous: Constant
Lag Length: 0 (Automatic based on SIC, MAXLAG=10)
			t-Statistic	Prob.*
Augmented Dickey-Fuller test statistic			-50.76207	0.0001
Test critical values:	1% level		-3.571310
	5% level		-2.922449
	10% level		-2.599224
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(CONSO_IND)
Method: Least Squares
Date: 05/08/12 Time: 23:52
Sample (adjusted): 1961 2009
Included observations: 49 after adjustments
Variable	Coefficient	Std. Error	t-Statistic	Prob.
CONSO_IND(-1)	-0.082578	0.001627	-50.76207	0.0000
C	-32.13505	42.42975	-0.757371	0.4526
R-squared	0.982087	Mean dependent var		-1473.776
Adjusted R-squared	0.981706	S.D. dependent var		1631.455
S.E. of regression	220.6639	Akaike info criterion		13.67112
Sum squared resid	2288551.	Schwarz criterion		13.74834
Log likelihood	-332.9424	F-statistic		2576.787
Durbin-Watson stat	2.062987	Prob(F-statistic)		0.000000

Null Hypothesis: D(CONSO_PART) has a unit root
Exogenous: Constant
Lag Length: 0 (Automatic based on SIC, MAXLAG=10)
			t-Statistic	Prob.*
Augmented Dickey-Fuller test statistic			-7.890494	0.0000
Test critical values:	1% level		-3.574446
	5% level		-2.923780
	10% level		-2.599925
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(CONSO_PART,2)
Method: Least Squares
Date: 05/08/12 Time: 23:54
Sample (adjusted): 1962 2009
Included observations: 48 after adjustments
Variable	Coefficient	Std. Error	t-Statistic	Prob.
D(CONSO_PART(-1))	-1.150204	0.145771	-7.890494	0.0000
C	343.2831	123.1217	2.788161	0.0077
R-squared	0.575097	Mean dependent var		3.541667
Adjusted R-squared	0.565860	S.D. dependent var		1212.868
S.E. of regression	799.1506	Akaike info criterion		16.24575
Sum squared resid	29377519	Schwarz criterion		16.32372
Log likelihood	-387.8980	F-statistic		62.25990
Durbin-Watson stat	2.003725	Prob(F-statistic)		0.000000

Null Hypothesis: D(INVEST) has a unit root
Exogenous: Constant
Lag Length: 2 (Automatic based on SIC, MAXLAG=10)
			t-Statistic	Prob.*
Augmented Dickey-Fuller test statistic			-6.521950	0.0000
Test critical values:	1% level		-3.581152
	5% level		-2.926622
	10% level		-2.601424
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(INVEST,2)
Method: Least Squares
Date: 05/08/12 Time: 23:55
Sample (adjusted): 1964 2009
Included observations: 46 after adjustments
Variable	Coefficient	Std. Error	t-Statistic	Prob.
D(INVEST(-1))	-1.949915	0.298977	-6.521950	0.0000
D(INVEST(-1),2)	0.623532	0.229943	2.711677	0.0097
D(INVEST(-2),2)	0.389517	0.142164	2.739917	0.0090
C	7437576.	1532858.	4.852098	0.0000
R-squared	0.685317	Mean dependent var		56360.39
Adjusted R-squared	0.662840	S.D. dependent var		12175881
S.E. of regression	7069982.	Akaike info criterion		34.46356
Sum squared resid	2.10E+15	Schwarz criterion		34.62257
Log likelihood	-788.6618	F-statistic		30.48928
Durbin-Watson stat	2.141762	Prob(F-statistic)		0.000000

Null Hypothesis: D(POP_URB,2) has a unit root
Exogenous: Constant
Lag Length: 9 (Automatic based on SIC, MAXLAG=10)
			t-Statistic	Prob.*
Augmented Dickey-Fuller test statistic			-5.199473	0.0001
Test critical values:	1% level		-3.615588
	5% level		-2.941145
	10% level		-2.609066
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(POP_URB,3)
Method: Least Squares
Date: 05/08/12 Time: 23:57
Sample (adjusted): 1972 2009
Included observations: 38 after adjustments
Variable	Coefficient	Std. Error	t-Statistic	Prob.
D(POP_URB(-1),2)	-2.059606	0.396118	-5.199473	0.0000
D(POP_URB(-1),3)	1.011092	0.359037	2.816124	0.0090
D(POP_URB(-2),3)	0.974369	0.323354	3.013323	0.0056
D(POP_URB(-3),3)	0.951095	0.288403	3.297798	0.0027
D(POP_URB(-4),3)	0.956742	0.254704	3.756289	0.0008
D(POP_URB(-5),3)	0.434141	0.218901	1.983277	0.0576
D(POP_URB(-6),3)	0.424530	0.187599	2.262969	0.0319
D(POP_URB(-7),3)	0.410886	0.156081	2.632520	0.0138
D(POP_URB(-8),3)	0.388085	0.122825	3.159665	0.0039
D(POP_URB(-9),3)	0.373611	0.084538	4.419462	0.0001
C	15135.16	3156.210	4.795359	0.0001
R-squared	0.885435	Mean dependent var		-1173.110
Adjusted R-squared	0.843004	S.D. dependent var		12124.90
S.E. of regression	4804.218	Akaike info criterion		20.02957
Sum squared resid	6.23E+08	Schwarz criterion		20.50361
Log likelihood	-369.5619	F-statistic		20.86746
Durbin-Watson stat	1.648535	Prob(F-statistic)		0.000000