K. Ludi: consumption behaviour in Zambia
20
Appendix A
Unit Root Tests
Table10: Unit root tests
Series |
Model |
ADF15 Lags |
ADF Tτ, Tμ, τ |
ADF Φ3, Φ1 |
PP16 Lags |
PP |
LN_CONS_ZK |
Trend |
"0 |
-1.771 |
1.775 |
~ |
-1.696 |
Intercept |
0 |
-1.650 |
2.722 |
3 |
-1.689 | |
None |
0 |
-0.152 |
- |
3 |
-0.170 | |
.....ln gdp zk........................................................... |
Trend |
'o....................................... |
.....-3.635 **.......................... |
6.612 *** |
.....3................................. |
.....-3.378"*............................. |
Intercept |
0 |
-1.593 |
2.539 |
3 |
-1.333 | |
None |
0 |
1.566 |
- |
3 |
3.323 | |
.....LN INDTAX ZK........................................ |
Trend |
.....1........................................ |
.....-4730""***.................... |
■■■■7.628"***......................... |
.....3................................. |
.....-4.059"**........................ |
Intercept |
0 |
-2.216 |
4.911 ** |
3 |
-2.006 | |
None |
0 |
0.608 |
- |
3 |
3.048 | |
.....LN INV................................................................................ |
Trend |
'o....................................... |
.....-3.326 *............................... |
"5.262........................................... |
.....3................................. |
.....-3.240"*............................. |
Intercept |
0 |
-2.287 |
5.232 ** |
3 |
-2.070 | |
None |
1 |
-0.602 |
- |
3 |
-0.822 | |
.....LN M3 ZK................................................................. |
Trend |
'o....................................... |
.....-1.839...................................... |
.....1.700........................................... |
.....3................................. |
.....-1.925.................................... |
Intercept |
0 |
-1.325 |
1.757 |
3 |
-1.325 | |
None |
0 |
-0.160 |
- |
3 |
-0.156 | |
.....ln gcons zk............................................ |
Trend |
.....1........................................ |
.....-4.404***.................... |
■■■■6.69g"***......................... |
.....3................................. |
.....-4.187'"**........................ |
Intercept |
1 |
-2.718 * |
3.918 |
3 |
-2.033 | |
None |
4 |
-1.120 |
- |
3 |
-0.432 | |
.....R Lendrate................................................... |
Trend |
'o....................................... |
.....-2.247...................................... |
""2.823........................................... |
.....3................................. |
.....-2.271..................................... |
Intercept |
0 |
-2.338 |
5.468 ** |
3 |
-2.401 | |
None |
0 |
-2.216 ** |
- |
3 |
-2.253 ** | |
.....R TRILL............................................................................ |
Trend |
'o....................................... |
.....-2.302...................................... |
""2.998........................................... |
.....3................................. |
.....-2.299.................................... |
Intercept |
0 |
-2.395 |
5.734 ** |
3 |
-2.438 | |
None |
0 |
-2.143 ** |
- |
3 |
-2.135 ** | |
.....ΔlNZcons"zk............................................. |
Trend |
'o....................................... |
.....-5.902"***.................... |
.....17.442"***.................... |
.....3................................. |
.....-6.550"***.................. |
Intercept |
0 |
-5.867 *** |
34.419 *** |
3 |
-5.910 *** | |
None |
0 |
-5.971 *** |
- |
3 |
-6.020 *** | |
δln gdp zk |
Trend |
'o....................................... |
.....-6.820"***.................... |
""23.274"***.................... |
.....3................................. |
.....-7.172"***.................. |
Intercept |
0 |
-6.932 *** |
48.050 *** |
3 |
-7.298 *** | |
None |
0 |
-6.365 *** |
- |
3 |
-6.370 *** | |
.....δln indtax zk................................. |
Trend |
.....1........................................ |
.....-6.144"***.................... |
.....15.374"***.................... |
.....3................................. |
.....-14.077"***............. |
Intercept |
1 |
-6.268 *** |
23.984 *** |
3 |
-14.556 *** | |
None |
1 |
-6.192 *** |
- |
3 |
-6.939 *** |
16
Augmented Dickey Fuller unit root test (Dickey and Fuller 1979).
Phillips Perron unit root test (Phillips and Perron 1988).
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