Lampiran.1 Daftar Populasi dan Sampel Perusahaan Pertambangan
No.
Kode
Nama Perusahaan
Kriteria
1
2
3
1
ADRO
Adaro Energy Tbk
X
X
2
ATPK
ATPK Resources Tbk
X
X
3
BUMI
Bumi Resources Tbk
4
BYAN
Bayan Resources Tbk
5
ITMG
Indo Tambangraya Megah Tbk
6
KKGI
Resource Alam Indonesia Tbk
X
7
PKPK
Perdana Karya Perkasa Tbk
X
X
8
PTBA
Tambang Batubara Bukit Asam (Persero) Tbk
9
PTRO
Petrosea Tbk
10
ARTI
Ratu Prabu Energi Tbk
X
11
BIPI
Benakat Petroleum Energy Tbk
X
X
12
ELSA
Elnusa Tbk
X
13
ENRG
Energi Mega Persada Tbk
X
14
MEDC Medco Energi International Tbk
X
15
RUIS
Radiant Utama Interinsco Tbk
X
16
ANTM Aneka Tambang (Persero) Tbk
17
ARII
Atlas Resources Tbk
X
X
18
BORN
Borneo Lumbung Energi & Metal Tbk
X
19
BRAU
Berau Coal Energy Tbk
X
20
BRMS
Bumi Resources Minerals Tbk
X
X
21
DEWA Darma Henwa Tbk
X
22
GEMS
Golden Energy Mines Tbk
X
23
GTBO
Garda Tujuh Buana Tbk
X
24
HRUM Harum Energy Tbk
X
25
INCO
Vale Indonesia Tbk
26
SMRU
SMR Utama Tbk
X
27
TINS
Timah (Persero) Tbk
X
28
CNKO
Exploitasi Energi Indonesia Tbk
X
X
29
CTTH
Citatah Tbk
X
30
MITI
Mitra Investindo Tbk
X
Lampiran.3 Hasil Pengujian
Panel Unit Root
dengan Software E-views 7.0
Perubahan Laba (Y)
Panel unit root test: Summary Series: Y
Date: 09/10/14 Time: 19:19 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -6.23335 0.0000 7 35
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -1.38877 0.0825 7 35 ADF - Fisher Chi-square 24.0049 0.0458 7 35 PP - Fisher Chi-square 30.8095 0.0059 7 35
** Probabilities for Fisher tests are computed using an asymptotic Chi -square distribution. All other tests assume asymptotic normality.
Gross Profit Margin
(GPM)
Panel unit root test: Summary Series: GPM
Date: 09/10/14 Time: 19:22 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -2.84215 0.0022 7 35
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -0.03118 0.4876 7 35 ADF - Fisher Chi-square 14.7217 0.3974 7 35 PP - Fisher Chi-square 17.9366 0.2097 7 35
1
stDifferencing
Gross Profit Margin
(
∆GPM
)
Panel unit root test: Summary Series: D(GPM)
Date: 09/10/14 Time: 19:25 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -5.91207 0.0000 7 28
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -2.55361 0.0053 7 28 ADF - Fisher Chi-square 26.0058 0.0258 7 28 PP - Fisher Chi-square 25.0025 0.0345 7 28
** Probabilities for Fisher tests are computed using an asymptotic Chi -square distribution. All other tests assume asymptotic normality.
Net Profit Margin
(NPM)
Panel unit root test: Summary Series: NPM
Date: 09/10/14 Time: 19:26 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -1.52464 0.0637 7 35
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat 0.65849 0.7449 7 35 ADF - Fisher Chi-square 9.62253 0.7892 7 35 PP - Fisher Chi-square 8.45760 0.8642 7 35
1
stDifferencing
Net Profit Margin
(
∆
NPM)
Panel unit root test: Summary Series: D(NPM)
Date: 09/10/14 Time: 19:28 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -5.53844 0.0000 7 28
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -3.33219 0.0004 7 28 ADF - Fisher Chi-square 30.9719 0.0056 7 28 PP - Fisher Chi-square 25.7878 0.0275 7 28
** Probabilities for Fisher tests are computed using an asymptotic Chi -square distribution. All other tests assume asymptotic normality.
Earning Power of Total Investment
(EP)
Panel unit root test: Summary Series: EP
Date: 09/10/14 Time: 19:28 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -5.32109 0.0000 7 35
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -0.87790 0.1900 7 35 ADF - Fisher Chi-square 19.9704 0.1311 7 35 PP - Fisher Chi-square 19.5613 0.1446 7 35
1
stDifferencing
Earning Power of Total Investment
(
∆
EP)
Panel unit root test: Summary Series: D(EP)
Date: 09/10/14 Time: 19:29 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -11.3058 0.0000 7 28
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -3.82692 0.0001 7 28 ADF - Fisher Chi-square 33.1867 0.0027 7 28 PP - Fisher Chi-square 37.8310 0.0006 7 28
** Probabilities for Fisher tests are computed using an asymptotic Chi -square distribution. All other tests assume asymptotic normality.
Return on Equity
(RoE)
Panel unit root test: Summary Series: ROE
Date: 09/10/14 Time: 19:29 Sample: 2006 2011
Exogenous variables: Individual effects Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
Newey-West automatic bandwidth selection and Bartlett kernel Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -5.01142 0.0000 7 35
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -1.33514 0.0909 7 35 ADF - Fisher Chi-square 23.9702 0.0462 7 35 PP - Fisher Chi-square 29.8229 0.0081 7 35
Lampiran.4 Hasil Pengujian
Causality Granger
dengan Software E-views 7.0
Variabel 1
stDifferencing
GPM dan Y
Pairwise Granger Causality Tests Date: 09/10/14 Time: 19:32 Sample: 2006 2011
Lags: 2
Null Hypothesis: Obs F-Statistic Prob.
DGPM does not Granger Cause Y 21 0.05090 0.9505 Y does not Granger Cause DGPM 41.5444 5.E-07
Variabel 1
stDifferencing
NPM dan Y
Pairwise Granger Causality Tests Date: 09/10/14 Time: 19:34 Sample: 2006 2011
Lags: 2
Null Hypothesis: Obs F-Statistic Prob.
DNPM does not Granger Cause Y 21 0.02246 0.9778 Y does not Granger Cause DNPM 37.9802 8.E-07
Variabel 1
stDifferencing
EP dan Y
Pairwise Granger Causality Tests Date: 09/10/14 Time: 19:35 Sample: 2006 2011
Lags: 2
Null Hypothesis: Obs F-Statistic Prob.
DEP does not Granger Cause Y 21 2.96542 0.0803 Y does not Granger Cause DEP 101.872 8.E-10
Variabel RoE dan Y
Pairwise Granger Causality Tests Date: 09/10/14 Time: 19:36 Sample: 2006 2011
Lags: 2
Null Hypothesis: Obs F-Statistic Prob.
Lampiran.5 Hasil Estimasi dengan Pendekatan
Pooled Least Squared
Dependent Variable: Y Method: Panel Least Squares Date: 09/10/14 Time: 13:47 Sample: 2006 2011
Periods included: 6 Cross-sections included: 7
Total panel (balanced) observations: 42
Variable Coefficient Std. Error t-Statistic Prob.
C -2.491134 0.637725 -3.906282 0.0004 GPM 3.574776 0.644299 5.548320 0.0000 NPM -5.601880 1.235720 -4.533291 0.0001 EP 3.327115 1.038765 3.202951 0.0028 ROE 4.193287 1.644792 2.549434 0.0151
Lampiran.6 Hasil Estimasi dengan Pendekatan
Fixed Effect Model
Dependent Variable: Y Method: Panel Least Squares Date: 09/10/14 Time: 13:49 Sample: 2006 2011
Periods included: 6 Cross-sections included: 7
Total panel (balanced) observations: 42
Variable Coefficient Std. Error t-Statistic Prob.
C -3.035738 0.589919 -5.146029 0.0000 GPM 4.699656 0.660387 7.116523 0.0000 NPM -5.695634 1.115253 -5.107032 0.0000 EP 3.303255 0.950615 3.474860 0.0015 ROE 3.049363 1.495024 2.039675 0.0500
Effects Specification
Cross-section fixed (dummy variables)
Lampiran.7
Hausman Test
Correlated Random Effects - Hausman Test Equation: RANDOM
Test cross-section random effects
Test Summary
Chi-Sq.
Statistic Chi-Sq. d.f. Prob.
Cross-section random 16.771819 4 0.0021
** WARNING: estimated cross-section random effects variance is zero.
Cross-section random effects test comparisons:
Variable Fixed Random Var(Diff.) Prob.
GPM 4.699656 3.574776 0.116981 0.0010 NPM -5.695634 -5.601880 0.069886 0.7229 EP 3.303255 3.327115 0.074149 0.9302 ROE 3.049363 4.193287 0.155334 0.0037
Cross-section random effects test equation: Dependent Variable: Y
Method: Panel Least Squares Date: 09/10/14 Time: 19:49 Sample: 2006 2011
Periods included: 6 Cross-sections included: 7
Total panel (balanced) observations: 42
Variable Coefficient Std. Error t-Statistic Prob.
C -3.035738 0.589919 -5.146029 0.0000
Cross-section fixed (dummy variables)
Lampiran.8 Uji Normalitas (
Normality Test
)
0 2 4 6 8 10
-3 -2 -1 0 1 2 3 4 5
Series: Standardized Residuals Sample 2006 2011
Observations 42
Mean 3.17e-17 Median 0.126996 Maximum 4.779403 Minimum -3.220776 Std. Dev. 1.625708 Skewness 0.327290 Kurtosis 3.641341