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@betasy 2017-05-24T01:55:39.000000Z 字数 30519 阅读 1053

面板数据估算主要结果

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  1. . do "G:\Stock Estimation Study\codes\stock_panel_analysis.do"

Steel Stock Panel Data

  1. . import excel "G:\Stock Estimation Study\OriginalData\StockSteelPanel1992_2008_PanelData.xls", sheet("Sheet1") firstrow case(upper) clear
  1. . sort ZONE_CODE YEAR
  1. . xtset ZONE_CODE YEAR
   panel variable:  ZONE_CODE (strongly balanced)
    time variable:  YEAR, 1992 to 2008
            delta:  1 unit
  1. . xtbalance, range(1992, 2007)

(160 observations deleted due to out of range)

  1. . xtunitroot llc LOG_LIGHT_PER_AREA
Levin-Lin-Chu unit-root test for LOG_LIGHT_PER_AREA
Ho: Panels contain unit roots               Number of panels  =    159
Ha: Panels are stationary                   Number of periods =     16

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t       -37.0041
 Adjusted t*        -12.9499        0.0000
------------------------------------------------------------------------------
  1. . xtunitroot llc LOG_STOCK_PER_AREA
Levin-Lin-Chu unit-root test for LOG_STOCK_PER_AREA
---------------------------------------------------
Ho: Panels contain unit roots               Number of panels  =    159
Ha: Panels are stationary                   Number of periods =     16

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t        -2.8902
 Adjusted t*         -0.3745        0.3540
------------------------------------------------------------------------------
  1. . xtwest LOG_LIGHT_PER_AREA LOG_STOCK_PER_AREA,lags(0)
Calculating Westerlund ECM panel cointegration tests..........

Results for H0: no cointegration
With 159 series and 1 covariate

-----------------------------------------------+
 Statistic |   Value   |  Z-value  |  P-value  |
-----------+-----------+-----------+-----------|
     Gt    |   -5.292  |  -52.311  |   0.000   |
     Ga    |   -7.117  |   -9.191  |   0.000   |
     Pt    |  -34.243  |  -23.822  |   0.000   |
     Pa    |   -2.764  |   -7.566  |   0.000   |
-----------------------------------------------+
  1. . xtreg LOG_STOCK_PER_AREA LOG_LIGHT_PER_AREA i.YEAR i.ZONE_CODE
Random-effects GLS regression                   Number of obs     =      2,544
Group variable: ZONE_CODE                       Number of groups  =        159

R-sq:                                           Obs per group:
     within  = 0.5316                                         min =         16
     between = 1.0000                                         avg =       16.0
     overall = 0.9947                                         max =         16

                                                Wald chi2(174)    =  441595.44
corr(u_i, X)   = 0 (assumed)                    Prob > chi2       =     0.0000

------------------------------------------------------------------------------------
LOG_STOCK_PER_AREA |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------------+----------------------------------------------------------------
LOG_LIGHT_PER_AREA |   .1774761   .0250222     7.09   0.000     .1284336    .2265186
                   |
              YEAR |
             1993  |   -.020583    .025726    -0.80   0.424    -.0710051     .029839
             1994  |   .0030187   .0265171     0.11   0.909    -.0489539    .0549912
             1995  |   .0397774   .0268229     1.48   0.138    -.0127945    .0923494
             1996  |   .0800078   .0273573     2.92   0.003     .0263886    .1336271
             1997  |   .1080289    .028831     3.75   0.000     .0515211    .1645367
             1998  |    .140126   .0290924     4.82   0.000     .0831059    .1971461
             1999  |   .1718153   .0300616     5.72   0.000     .1128956    .2307349
             2000  |   .2187836   .0303132     7.22   0.000     .1593708    .2781965
             2001  |   .2738928   .0304279     9.00   0.000     .2142553    .3335303
             2002  |   .3226873   .0305584    10.56   0.000     .2627939    .3825807
             2003  |   .3643156   .0306851    11.87   0.000     .3041739    .4244573
             2004  |   .4159676   .0308917    13.47   0.000     .3554209    .4765143
             2005  |   .4701667   .0309302    15.20   0.000     .4095446    .5307888
             2006  |   .5200243   .0310344    16.76   0.000     .4591979    .5808507
             2007  |   .5656801   .0311789    18.14   0.000     .5045705    .6267896
                   |
         ZONE_CODE |
                2  |   2.603189   .1032575    25.21   0.000     2.400808     2.80557
                3  |   5.110154   .1900558    26.89   0.000     4.737651    5.482656
                4  |   .7861518    .076097    10.33   0.000     .6370044    .9352992
                5  |   3.886602   .1449702    26.81   0.000     3.602466    4.170739
                6  |   3.849154   .1774581    21.69   0.000     3.501343    4.196966
                7  |   2.824678   .1102932    25.61   0.000     2.608507    3.040849
                8  |   2.736722    .092404    29.62   0.000     2.555614    2.917831
                9  |   6.331761   .1402635    45.14   0.000      6.05685    6.606673
               10  |   4.824811   .1386759    34.79   0.000     4.553011    5.096611
               11  |   7.157272   .2168326    33.01   0.000     6.732288    7.582256
               12  |    3.34085   .1190295    28.07   0.000     3.107557    3.574143
               13  |   6.258582   .2043253    30.63   0.000     5.858112    6.659052
               14  |    9.54039   .1825055    52.27   0.000     9.182686    9.898094
               15  |   2.255478   .0990042    22.78   0.000     2.061433    2.449523
               16  |   1.802859    .081425    22.14   0.000     1.643269    1.962449
               17  |    8.66984   .2119789    40.90   0.000     8.254369    9.085311
               18  |   1.219851    .089364    13.65   0.000     1.044701    1.395002
               19  |   .6529144   .1570086     4.16   0.000     .3451832    .9606456
               20  |   5.739473   .1700272    33.76   0.000     5.406226    6.072721
               21  |   2.721162   .1092237    24.91   0.000     2.507088    2.935237
               22  |    5.05734     .17211    29.38   0.000      4.72001    5.394669
               23  |   4.554775   .1168391    38.98   0.000     4.325775    4.783775
               24  |   .9884869   .0794496    12.44   0.000     .8327684    1.144205
               25  |   1.774394   .0903217    19.65   0.000     1.597366    1.951421
               26  |   2.346005   .0770428    30.45   0.000     2.195004    2.497006
               27  |   1.791387   .0788889    22.71   0.000     1.636767    1.946006
               28  |    2.69725   .1221605    22.08   0.000      2.45782    2.936681
               29  |   2.660891   .1102884    24.13   0.000      2.44473    2.877052
               30  |    4.94475   .1859478    26.59   0.000     4.580299    5.309201
               31  |  -.4249605   .0845175    -5.03   0.000    -.5906119   -.2593092
               32  |   -.902141   .0922882    -9.78   0.000    -1.083023   -.7212594
               33  |    3.18022   .1084585    29.32   0.000     2.967646    3.392795
               34  |   4.651001   .1129269    41.19   0.000     4.429668    4.872333
               35  |    5.57887   .2188149    25.50   0.000         5.15    6.007739
               36  |   6.666931    .208074    32.04   0.000     6.259114    7.074749
               37  |   2.787458   .1125064    24.78   0.000     2.566949    3.007966
               38  |   .1993255   .0761006     2.62   0.009     .0501712    .3484799
               39  |   3.808611    .141189    26.98   0.000     3.531886    4.085337
               40  |    2.44163    .091982    26.54   0.000     2.261348    2.621911
               41  |    6.18929   .1711618    36.16   0.000     5.853819    6.524761
               42  |   6.781602   .1533969    44.21   0.000      6.48095    7.082255
               43  |   6.291124   .0796146    79.02   0.000     6.135082    6.447166
               44  |   6.090927   .1601237    38.04   0.000      5.77709    6.404763
               45  |   2.308292   .0884414    26.10   0.000      2.13495    2.481634
               46  |  -.3078293   .1432012    -2.15   0.032    -.5884985   -.0271601
               47  |   7.282767   .1068998    68.13   0.000     7.073247    7.492287
               48  |   3.090885   .1218146    25.37   0.000     2.852133    3.329637
               49  |   3.252749   .1307354    24.88   0.000     2.996512    3.508986
               50  |    4.36189    .148241    29.42   0.000     4.071343    4.652437
               51  |   .9754725   .0957183    10.19   0.000      .787868    1.163077
               52  |  -6.104545   .0763572   -79.95   0.000    -6.254202   -5.954888
               53  |   3.843655   .0840356    45.74   0.000     3.678948    4.008361
               54  |   3.966945   .1503422    26.39   0.000     3.672279     4.26161
               55  |   1.679175   .0943396    17.80   0.000     1.494273    1.864077
               56  |    5.74933   .1609392    35.72   0.000     5.433895    6.064765
               57  |  -4.976709   .0841131   -59.17   0.000    -5.141567    -4.81185
               58  |   4.587548   .1161845    39.49   0.000      4.35983    4.815265
               60  |   1.598803   .1002627    15.95   0.000     1.402292    1.795314
               61  |   2.542571   .0897123    28.34   0.000     2.366739    2.718404
               62  |   6.571575   .1651862    39.78   0.000     6.247816    6.895334
               63  |   2.763994   .1028708    26.87   0.000      2.56237    2.965617
               64  |   7.323151   .2148861    34.08   0.000     6.901982     7.74432
               65  |   5.508636   .1394134    39.51   0.000     5.235391    5.781881
               66  |  -1.580525   .1231349   -12.84   0.000    -1.821865   -1.339185
               67  |   4.560422   .1432483    31.84   0.000     4.279661    4.841184
               68  |   5.716908   .1831038    31.22   0.000     5.358032    6.075785
               69  |   3.320269   .1199026    27.69   0.000     3.085264    3.555274
               70  |   .8575328    .075906    11.30   0.000     .7087598    1.006306
               71  |    1.47441   .0824857    17.87   0.000     1.312741    1.636079
               72  |   1.334522   .0758837    17.59   0.000     1.185792    1.483251
               73  |   2.636141   .1054931    24.99   0.000     2.429378    2.842904
               74  |   2.750756   .1141446    24.10   0.000     2.527036    2.974475
               75  |   5.402037     .14065    38.41   0.000     5.126368    5.677706
               76  |   2.607373   .1100338    23.70   0.000     2.391711    2.823035
               77  |   4.257643   .1221013    34.87   0.000     4.018329    4.496957
               78  |   2.994184   .1096406    27.31   0.000     2.779293    3.209076
               79  |   3.427369   .1308686    26.19   0.000     3.170871    3.683867
               80  |   2.942016   .1304737    22.55   0.000     2.686293     3.19774
               81  |   4.935492   .1387631    35.57   0.000     4.663522    5.207463
               82  |   5.880358   .1920806    30.61   0.000     5.503887    6.256829
               83  |   6.173831   .1745697    35.37   0.000      5.83168    6.515981
               84  |   4.953639   .1642204    30.16   0.000     4.631773    5.275505
               85  |   6.733105   .1830394    36.78   0.000     6.374354    7.091856
               86  |   3.680079   .1331551    27.64   0.000     3.419099    3.941058
               87  |   2.280317   .0814392    28.00   0.000     2.120699    2.439935
               88  |   5.703409   .1880893    30.32   0.000     5.334761    6.072057
               89  |   .3342622   .0763998     4.38   0.000     .1845213    .4840031
               90  |   5.364742   .1816595    29.53   0.000     5.008696    5.720788
               91  |   2.336329   .1037682    22.51   0.000     2.132947    2.539711
               92  |     1.6689   .0772072    21.62   0.000     1.517577    1.820223
               93  |   1.268319   .0898367    14.12   0.000     1.092242    1.444395
               95  |  -.2724419   .0781191    -3.49   0.000    -.4255524   -.1193313
               96  |   7.595832   .2199622    34.53   0.000     7.164714     8.02695
               97  |   5.924354   .1929939    30.70   0.000     5.546093    6.302615
               98  |  -.3351802   .0791882    -4.23   0.000    -.4903863   -.1799741
               99  |   5.276207   .1631774    32.33   0.000     4.956385    5.596028
              100  |   3.661193    .135793    26.96   0.000     3.395044    3.927343
              102  |   3.553916   .1112967    31.93   0.000     3.335778    3.772053
              103  |   2.019059   .0808971    24.96   0.000     1.860504    2.177614
              104  |   1.108592   .1757348     6.31   0.000     .7641584    1.453026
              106  |   .9441567   .0831011    11.36   0.000     .7812816    1.107032
              107  |   4.362284   .2095986    20.81   0.000     3.951478     4.77309
              108  |   6.870369   .1955651    35.13   0.000     6.487069     7.25367
              109  |   4.227897   .1174194    36.01   0.000      3.99776    4.458035
              110  |   2.277392   .1027015    22.17   0.000     2.076101    2.478683
              111  |  -.6373483    .079889    -7.98   0.000    -.7939278   -.4807687
              112  |   2.848983   .1319512    21.59   0.000     2.590364    3.107603
              113  |   3.604046    .139933    25.76   0.000     3.329782    3.878309
              114  |   2.130599   .1242694    17.14   0.000     1.887035    2.374162
              115  |   3.412685   .1213831    28.12   0.000     3.174779    3.650592
              117  |   5.595483   .1214484    46.07   0.000     5.357449    5.833518
              118  |   1.423087   .0775763    18.34   0.000      1.27104    1.575134
              119  |   1.648742   .0994794    16.57   0.000     1.453766    1.843718
              120  |   2.338954   .0938772    24.92   0.000     2.154958    2.522949
              121  |   4.650914   .1178226    39.47   0.000     4.419986    4.881842
              122  |   5.346469   .1431265    37.35   0.000     5.065946    5.626992
              123  |   5.229805   .1580569    33.09   0.000      4.92002    5.539591
              124  |   4.939746    .179955    27.45   0.000      4.58704    5.292451
              125  |    6.35389    .180773    35.15   0.000     5.999581    6.708198
              126  |   5.726378   .1570742    36.46   0.000     5.418518    6.034238
              127  |   5.474563   .1136703    48.16   0.000     5.251773    5.697353
              128  |   1.845566   .0929331    19.86   0.000     1.663421    2.027712
              129  |   4.496981    .166977    26.93   0.000     4.169712    4.824249
              130  |   4.733832   .1641757    28.83   0.000     4.412053     5.05561
              131  |   4.775307   .1478802    32.29   0.000     4.485467    5.065147
              133  |    3.14244    .128168    24.52   0.000     2.891236    3.393645
              134  |   2.474389   .0845347    29.27   0.000     2.308704    2.640074
              135  |   4.686379   .1258122    37.25   0.000     4.439791    4.932966
              136  |   2.441329   .0814458    29.97   0.000     2.281698    2.600959
              137  |   9.783396   .2267085    43.15   0.000     9.339056    10.22774
              139  |   5.193939   .1564124    33.21   0.000     4.887376    5.500502
              140  |   3.921011   .1196934    32.76   0.000     3.686416    4.155606
              141  |   .9960809   .0788118    12.64   0.000     .8416127    1.150549
              142  |   1.702818   .0828071    20.56   0.000     1.540519    1.865117
              143  |   4.364775     .14524    30.05   0.000      4.08011     4.64944
              144  |   6.650834   .1666899    39.90   0.000     6.324128     6.97754
              145  |   3.398973   .1426679    23.82   0.000     3.119349    3.678596
              146  |   4.429325   .1310184    33.81   0.000     4.172534    4.686116
              147  |   1.077054   .0812207    13.26   0.000     .9178646    1.236244
              148  |   2.475257   .0925628    26.74   0.000     2.293837    2.656677
              149  |   3.454272    .115012    30.03   0.000     3.228853    3.679692
              150  |   6.517822   .1756642    37.10   0.000     6.173526    6.862118
              151  |   3.890918   .1272132    30.59   0.000     3.641585    4.140252
              152  |   4.195256   .1220825    34.36   0.000     3.955978    4.434533
              153  |    .796287   .0796651    10.00   0.000     .6401462    .9524277
              154  |   4.152177   .1705846    24.34   0.000     3.817837    4.486517
              155  |   6.681123   .1829479    36.52   0.000     6.322552    7.039694
              156  |   .9787718   .0764644    12.80   0.000     .8289044    1.128639
              157  |   2.523383   .1135654    22.22   0.000     2.300799    2.745967
              158  |   4.773611   .1601149    29.81   0.000     4.459791     5.08743
              159  |   3.388351   .0927659    36.53   0.000     3.206533    3.570168
              160  |   2.954834    .104074    28.39   0.000     2.750852    3.158815
              161  |  -4.976312   .0758939   -65.57   0.000    -5.125061   -4.827563
              162  |   .7734057   .0827407     9.35   0.000     .6112369    .9355746
              163  |   2.155911    .096742    22.29   0.000       1.9663    2.345522
              381  |   1.065307   .0930303    11.45   0.000     .8829707    1.247643
              941  |   4.654125   .1333803    34.89   0.000     4.392704    4.915545
             5001  |   3.228903   .1705008    18.94   0.000     2.894728    3.563079
                   |
             _cons |   .6067668   .1220229     4.97   0.000     .3676062    .8459274
-------------------+----------------------------------------------------------------
           sigma_u |          0
           sigma_e |  .21461705
               rho |          0   (fraction of variance due to u_i)
------------------------------------------------------------------------------------

Al Stock Panel Data

  1. . import excel "G:\Stock Estimation Study\OriginalData\StockAlPanel1992_2010_PanelData.xls", sheet("Sheet1") firstrow case(upper) clear
  1. . sort ZONE_CODE YEAR
  1. . xtset ZONE_CODE YEAR
   panel variable:  ZONE_CODE (strongly balanced)
    time variable:  YEAR, 1992 to 2010
            delta:  1 unit
  1. . xtbalance, range(1992, 2009)

(134 observations deleted due to out of range)

  1. . xtunitroot llc LOG_LIGHT_PER_AREA
Levin-Lin-Chu unit-root test for LOG_LIGHT_PER_AREA
---------------------------------------------------
Ho: Panels contain unit roots               Number of panels  =    134
Ha: Panels are stationary                   Number of periods =     18

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t       -33.4731
 Adjusted t*        -10.5480        0.0000
------------------------------------------------------------------------------
  1. . xtunitroot llc LOG_STOCK_PER_AREA
Levin-Lin-Chu unit-root test for LOG_STOCK_PER_AREA
---------------------------------------------------
Ho: Panels contain unit roots               Number of panels  =    134
Ha: Panels are stationary                   Number of periods =     18

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t        -8.3116
 Adjusted t*         -4.4511        0.0000
------------------------------------------------------------------------------
  1. . xtwest LOG_LIGHT_PER_AREA LOG_STOCK_PER_AREA,lags(0)
Calculating Westerlund ECM panel cointegration tests..........

Results for H0: no cointegration
With 134 series and 1 covariate

-----------------------------------------------+
 Statistic |   Value   |  Z-value  |  P-value  |
-----------+-----------+-----------+-----------|
     Gt    |   -2.200  |  -13.620  |   0.000   |
     Ga    |   -5.006  |   -3.065  |   0.001   |
     Pt    |  -15.479  |   -8.198  |   0.000   |
     Pa    |   -2.033  |   -4.023  |   0.000   |
-----------------------------------------------+
  1. . xtreg LOG_STOCK_PER_AREA LOG_LIGHT_PER_AREA i.YEAR i.ZONE_CODE
Random-effects GLS regression                   Number of obs     =      2,412
Group variable: ZONE_CODE                       Number of groups  =        134

R-sq:                                           Obs per group:
     within  = 0.6118                                         min =         18
     between = 1.0000                                         avg =       18.0
     overall = 0.9878                                         max =         18

                                                Wald chi2(151)    =  183343.53
corr(u_i, X)   = 0 (assumed)                    Prob > chi2       =     0.0000

------------------------------------------------------------------------------------
LOG_STOCK_PER_AREA |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------------+----------------------------------------------------------------
LOG_LIGHT_PER_AREA |   .4733397    .034778    13.61   0.000     .4051761    .5415034
                   |
              YEAR |
             1993  |   -.129406   .0400461    -3.23   0.001    -.2078949   -.0509172
             1994  |  -.1176847   .0409323    -2.88   0.004    -.1979106   -.0374589
             1995  |  -.0752216    .041167    -1.83   0.068    -.1559074    .0054642
             1996  |  -.0365111   .0418516    -0.87   0.383    -.1185388    .0455166
             1997  |  -.0241225   .0434735    -0.55   0.579    -.1093289    .0610839
             1998  |    .036201   .0434735     0.83   0.405    -.0490054    .1214075
             1999  |    .053782   .0450423     1.19   0.232    -.0344993    .1420633
             2000  |   .1220358   .0453666     2.69   0.007     .0331189    .2109526
             2001  |   .1838493   .0455299     4.04   0.000     .0946123    .2730862
             2002  |   .2442278   .0456897     5.35   0.000     .1546777     .333778
             2003  |   .3182977   .0458813     6.94   0.000     .2283719    .4082234
             2004  |   .4040333    .046165     8.75   0.000     .3135515     .494515
             2005  |    .490974    .046222    10.62   0.000     .4003805    .5815675
             2006  |   .5754624   .0463682    12.41   0.000     .4845824    .6663424
             2007  |   .6545021   .0465692    14.05   0.000     .5632281     .745776
             2008  |   .6790142   .0494164    13.74   0.000       .58216    .7758685
             2009  |    .822349   .0459898    17.88   0.000     .7322107    .9124873
                   |
         ZONE_CODE |
                2  |   2.312705    .129389    17.87   0.000     2.059107    2.566302
                3  |   .7739515   .1413588     5.48   0.000     .4968934     1.05101
                4  |  -.1348575   .1043121    -1.29   0.196    -.3393055    .0695904
                5  |    1.42493   .1506312     9.46   0.000     1.129698    1.720162
                6  |   1.976455   .1256412    15.73   0.000     1.730203    2.222708
                7  |    4.31093    .192119    22.44   0.000     3.934383    4.687476
                8  |   6.661833   .2984585    22.32   0.000     6.076865    7.246801
                9  |   2.243389   .1624433    13.81   0.000     1.925006    2.561772
               10  |   3.800118     .28106    13.52   0.000     3.249251    4.350985
               11  |   7.447655   .2508562    29.69   0.000     6.955986    7.939324
               12  |   1.598648   .1356568    11.78   0.000     1.332765     1.86453
               13  |   1.151268   .1114218    10.33   0.000     .9328855    1.369651
               14  |   5.690252   .2916309    19.51   0.000     5.118666    6.261839
               15  |   .0313623   .1215826     0.26   0.796    -.2069352    .2696598
               16  |   1.412816   .1492018     9.47   0.000     1.120386    1.705246
               17  |   1.606105   .1594678    10.07   0.000     1.293554    1.918656
               18  |   .4377111   .1086726     4.03   0.000     .2247168    .6507055
               19  |   .6264025    .123274     5.08   0.000     .3847898    .8680151
               20  |   .7757214   .1055148     7.35   0.000     .5689162    .9825266
               21  |   3.154735   .1077991    29.26   0.000     2.943452    3.366017
               22  |    1.48848   .1668071     8.92   0.000     1.161544    1.815416
               23  |  -.4082643   .1166901    -3.50   0.000    -.6369727    -.179556
               24  |  -1.643454   .1269464   -12.95   0.000    -1.892264   -1.394643
               25  |   1.529731   .1480773    10.33   0.000     1.239505    1.819957
               26  |   2.857939   .1552073    18.41   0.000     2.553739     3.16214
               27  |    1.18934   .1536911     7.74   0.000     .8881107    1.490569
               28  |  -1.079324   .1041785   -10.36   0.000    -1.283511   -.8751383
               29  |   1.847701   .1933411     9.56   0.000      1.46876    2.226643
               30  |   1.261638    .160822     7.84   0.000     .9464322    1.576843
               31  |   4.039378   .2353494    17.16   0.000     3.578101    4.500654
               32  |   3.383407   .2102236    16.09   0.000     2.971376    3.795437
               33  |   3.806792    .219575    17.34   0.000     3.376433    4.237152
               34  |   1.368445   .1207117    11.34   0.000     1.131855    1.605036
               35  |   6.456846     .14535    44.42   0.000     6.171965    6.741726
               36  |   1.340298   .1666713     8.04   0.000     1.013628    1.666967
               37  |   1.786918    .180344     9.91   0.000      1.43345    2.140386
               38  |   1.880242   .2033385     9.25   0.000     1.481706    2.278778
               39  |   .4892408   .1047338     4.67   0.000     .2839662    .6945153
               40  |   2.467608   .1140218    21.64   0.000     2.244129    2.691087
               41  |    1.54107   .2064528     7.46   0.000      1.13643     1.94571
               42  |   3.648426   .2208487    16.52   0.000     3.215571    4.081282
               43  |   3.631748   .1579444    22.99   0.000     3.322182    3.941313
               44  |   .2837449   .1373401     2.07   0.039     .0145633    .5529265
               45  |   1.839776   .1235749    14.89   0.000     1.597574    2.081979
               46  |   4.604203   .2266777    20.31   0.000     4.159923    5.048483
               47  |   3.343652   .1408886    23.73   0.000     3.067515    3.619789
               48  |   3.387324    .191246    17.71   0.000     3.012489     3.76216
               49  |  -.2769497   .1727236    -1.60   0.109    -.6154817    .0615824
               50  |   3.772375   .1969555    19.15   0.000      3.38635    4.158401
               51  |   2.090676   .1641391    12.74   0.000      1.76897    2.412383
               52  |   1.060248   .1039985    10.19   0.000     .8564152    1.264082
               53  |   .9405355   .1125595     8.36   0.000      .719923    1.161148
               54  |    .466419   .1039938     4.49   0.000     .2625948    .6702432
               55  |   .6837529   .1439238     4.75   0.000     .4016675    .9658383
               56  |   1.346345   .1560976     8.63   0.000     1.040399    1.652291
               57  |   3.329367   .1927039    17.28   0.000     2.951674     3.70706
               58  |    2.30319   .1502829    15.33   0.000     2.008641    2.597739
               59  |   2.151235   .1670493    12.88   0.000     1.823825    2.478646
               60  |   1.075002   .1496555     7.18   0.000     .7816825    1.368321
               61  |   1.359808     .17931     7.58   0.000     1.008367    1.711249
               62  |   .6835395   .1787086     3.82   0.000     .3332771    1.033802
               63  |   3.315897   .1902139    17.43   0.000     2.943084    3.688709
               64  |   2.939968   .2643279    11.12   0.000     2.421895    3.458041
               65  |   3.946405   .2398559    16.45   0.000     3.476297    4.416514
               66  |   2.498765   .2253954    11.09   0.000     2.056998    2.940532
               67  |   4.752482   .2514821    18.90   0.000     4.259586    5.245378
               68  |   2.026717   .1825597    11.10   0.000     1.668906    2.384527
               69  |   .7425507   .1113664     6.67   0.000     .5242765    .9608249
               70  |   3.228296   .2590709    12.46   0.000     2.720527    3.736066
               71  |   2.855146   .2509851    11.38   0.000     2.363224    3.347067
               72  |   .4226101   .1423149     2.97   0.003      .143678    .7015423
               73  |   .6203247    .106068     5.85   0.000     .4124352    .8282141
               74  |   .2125353    .122932     1.73   0.084     -.028407    .4534776
               75  |   2.681002   .1832088    14.63   0.000     2.321919    3.040084
               76  |  -.3498157   .1072902    -3.26   0.001    -.5601006   -.1395307
               77  |   4.810825   .3028929    15.88   0.000     4.217166    5.404484
               78  |    -.85668   .1088953    -7.87   0.000    -1.070111   -.6432492
               79  |   3.247263   .2253204    14.41   0.000     2.805644    3.688883
               80  |   2.180629   .1860121    11.72   0.000     1.816052    2.545206
               81  |  -2.185534   .1064995   -20.52   0.000    -2.394269   -1.976799
               82  |   1.592339    .152701    10.43   0.000     1.293051    1.891628
               83  |   .5553524    .104024     5.34   0.000     .3514691    .7592357
               84  |  -.0615897   .1103956    -0.56   0.577    -.2779612    .1547817
               85  |   4.923885   .2689036    18.31   0.000     4.396844    5.450927
               86  |   2.623932   .1600713    16.39   0.000     2.310198    2.937666
               87  |   .8996235   .1401083     6.42   0.000     .6250162    1.174231
               88  |  -.8414774   .1100158    -7.65   0.000    -1.057104   -.6258504
               89  |   .8347392   .1805505     4.62   0.000     .4808667    1.188612
               90  |   2.850865   .1919463    14.85   0.000     2.474657    3.227073
               91  |   1.188513   .1703513     6.98   0.000     .8546304    1.522395
               92  |   .7363059   .1659105     4.44   0.000     .4111272    1.061485
               93  |   3.767545   .1661333    22.68   0.000      3.44193     4.09316
               94  |   .5768882   .1058639     5.45   0.000     .3693988    .7843777
               95  |   .7644224   .1357661     5.63   0.000     .4983258    1.030519
               96  |   .5276152   .1279919     4.12   0.000     .2767556    .7784747
               97  |   2.657977   .1612038    16.49   0.000     2.342023     2.97393
               98  |   2.226979     .19619    11.35   0.000     1.842454    2.611504
               99  |   3.310335   .2175067    15.22   0.000      2.88403     3.73664
              100  |   2.801994   .2478887    11.30   0.000     2.316141    3.287846
              101  |   3.580652   .2488314    14.39   0.000     3.092951    4.068353
              102  |   3.490968   .1556095    22.43   0.000     3.185979    3.795957
              103  |   .9028841   .1268548     7.12   0.000     .6542533    1.151515
              105  |   1.669354   .1753541     9.52   0.000     1.325667    2.013042
              106  |   1.429354    .115666    12.36   0.000     1.202653    1.656055
              107  |   4.054399   .1740562    23.29   0.000     3.713255    4.395543
              108  |   1.131037   .1119177    10.11   0.000     .9116824    1.350392
              109  |   7.553761   .3121292    24.20   0.000     6.941999    8.165523
              110  |   3.015198   .2147494    14.04   0.000     2.594297    3.436099
              111  |   2.108665    .163545    12.89   0.000     1.788123    2.429208
              112  |  -.2326517   .1078208    -2.16   0.031    -.4439766   -.0213269
              113  |   3.185689   .1128989    28.22   0.000     2.964411    3.406967
              114  |   2.259889   .1990391    11.35   0.000     1.869779    2.649998
              115  |   4.638932   .2289762    20.26   0.000     4.190147    5.087717
              116  |   1.351568   .1954181     6.92   0.000     .9685552     1.73458
              117  |   2.642245    .179514    14.72   0.000     2.290404    2.994086
              118  |   1.453196   .1263981    11.50   0.000      1.20546    1.700932
              119  |   3.228794   .1566871    20.61   0.000     2.921693    3.535895
              120  |   3.259428   .2424268    13.44   0.000     2.784281    3.734576
              121  |   1.475502   .1750155     8.43   0.000     1.132477    1.818526
              122  |   2.183229   .1671149    13.06   0.000      1.85569    2.510768
              123  |   .4813469   .1089262     4.42   0.000     .2678555    .6948383
              124  |   3.550355   .2349032    15.11   0.000     3.089953    4.010757
              125  |   3.848067    .251301    15.31   0.000     3.355526    4.340608
              126  |   .5097474   .1046869     4.87   0.000     .3045648      .71493
              127  |    1.12168   .1551954     7.23   0.000     .8175029    1.425858
              128  |   3.269618   .2196696    14.88   0.000     2.839074    3.700163
              129  |   1.716381   .1255332    13.67   0.000     1.470341    1.962422
              130  |   2.089907   .1750547    11.94   0.000     1.746806    2.433008
              131  |   1.571242   .1435321    10.95   0.000     1.289924     1.85256
              132  |   .5094402   .1292267     3.94   0.000     .2561605    .7627198
              133  |  -.7386834   .1130102    -6.54   0.000    -.9601793   -.5171875
              134  |  -.1673952   .1322617    -1.27   0.206    -.4266233    .0918329
              281  |  -.3790113   .1270641    -2.98   0.003    -.6280522   -.1299703
                   |
             _cons |  -1.840654   .1672535   -11.01   0.000    -2.168465   -1.512843
-------------------+----------------------------------------------------------------
           sigma_u |          0
           sigma_e |  .31196714
               rho |          0   (fraction of variance due to u_i)
------------------------------------------------------------------------------------

Cement Stock Panel Data

  1. . import excel "G:\Stock Estimation Study\OriginalData\StockCementPanel1992_2009_PanelData.xls", sheet("Sheet1") firstrow case(upper) clear
  1. . sort ZONE_CODE YEAR
  1. . xtset ZONE_CODE YEAR
   panel variable:  ZONE_CODE (strongly balanced)
    time variable:  YEAR, 1992 to 2009
            delta:  1 unit
  1. . xtbalance, range(1992, 2008)

(130 observations deleted due to out of range)

  1. . xtunitroot llc LOG_LIGHT_PER_AREA
Levin-Lin-Chu unit-root test for LOG_LIGHT_PER_AREA
---------------------------------------------------
Ho: Panels contain unit roots               Number of panels  =    130
Ha: Panels are stationary                   Number of periods =     17

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t       -31.3536
 Adjusted t*         -8.6994        0.0000
------------------------------------------------------------------------------
  1. . xtunitroot llc LOG_STOCK_PER_AREA
Levin-Lin-Chu unit-root test for LOG_STOCK_PER_AREA
---------------------------------------------------
Ho: Panels contain unit roots               Number of panels  =    130
Ha: Panels are stationary                   Number of periods =     17

AR parameter: Common                        Asymptotics: N/T -> 0
Panel means:  Included
Time trend:   Not included

ADF regressions: 1 lag
LR variance:     Bartlett kernel, 8.00 lags average (chosen by LLC)
------------------------------------------------------------------------------
                    Statistic      p-value
------------------------------------------------------------------------------
 Unadjusted t       -29.1914
 Adjusted t*        -27.2963        0.0000
------------------------------------------------------------------------------
  1. . xtwest LOG_LIGHT_PER_AREA LOG_STOCK_PER_AREA,lags(0)
Calculating Westerlund ECM panel cointegration tests..........

Results for H0: no cointegration
With 130 series and 1 covariate

-----------------------------------------------+
 Statistic |   Value   |  Z-value  |  P-value  |
-----------+-----------+-----------+-----------|
     Gt    |   -4.367  |  -37.162  |   0.000   |
     Ga    |   -5.471  |   -4.185  |   0.000   |
     Pt    |  -15.793  |   -8.544  |   0.000   |
     Pa    |   -0.879  |    0.579  |   0.719   |
-----------------------------------------------+
  1. . xtreg LOG_STOCK_PER_AREA LOG_LIGHT_PER_AREA i.YEAR i.ZONE_CODE
Random-effects GLS regression                   Number of obs     =      2,210
Group variable: ZONE_CODE                       Number of groups  =        130

R-sq:                                           Obs per group:
     within  = 0.6992                                         min =         17
     between = 1.0000                                         avg =       17.0
     overall = 0.9955                                         max =         17

                                                Wald chi2(146)    =  452344.18
corr(u_i, X)   = 0 (assumed)                    Prob > chi2       =     0.0000

------------------------------------------------------------------------------------
LOG_STOCK_PER_AREA |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------------+----------------------------------------------------------------
LOG_LIGHT_PER_AREA |   .2480622   .0232592    10.67   0.000     .2024749    .2936495
                   |
              YEAR |
             1993  |  -.0320401   .0224412    -1.43   0.153    -.0760241    .0119439
             1994  |   .0008853   .0230741     0.04   0.969    -.0443391    .0461097
             1995  |   .0469527   .0234764     2.00   0.046     .0009398    .0929656
             1996  |   .0958584   .0238574     4.02   0.000     .0490988    .1426181
             1997  |   .1229544    .025125     4.89   0.000     .0737103    .1721986
             1998  |   .1674397   .0254261     6.59   0.000     .1176054     .217274
             1999  |   .1956094   .0263531     7.42   0.000     .1439583    .2472605
             2000  |   .2400989   .0266106     9.02   0.000     .1879431    .2922547
             2001  |   .2847704   .0267779    10.63   0.000     .2322867    .3372541
             2002  |   .3372957   .0269045    12.54   0.000     .2845639    .3900275
             2003  |   .3859987   .0270444    14.27   0.000     .3329927    .4390048
             2004  |   .4307239   .0272008    15.83   0.000     .3774114    .4840365
             2005  |   .4778784   .0272853    17.51   0.000     .4244001    .5313566
             2006  |   .5257486   .0274195    19.17   0.000     .4720074    .5794898
             2007  |   .5746039   .0275161    20.88   0.000     .5206733    .6285344
             2008  |   .5967919   .0292176    20.43   0.000     .5395264    .6540574
                   |
         ZONE_CODE |
                2  |   4.281586   .0779242    54.95   0.000     4.128857    4.434315
                3  |   1.942128   .0873486    22.23   0.000     1.770928    2.113328
                4  |   .5649445   .0588238     9.60   0.000     .4496519    .6802371
                5  |   1.755871    .093981    18.68   0.000     1.571671     1.94007
                6  |   1.049253   .0756703    13.87   0.000     .9009417    1.197564
                7  |   4.824931   .1235234    39.06   0.000      4.58283    5.067032
                8  |   3.501827   .1219689    28.71   0.000     3.262772    3.740881
                9  |   5.966101   .1967351    30.33   0.000     5.580507    6.351695
               10  |   2.956879   .1025723    28.83   0.000     2.755841    3.157917
               11  |     5.2193   .1848786    28.23   0.000     4.856944    5.581655
               12  |   8.264771    .164151    50.35   0.000     7.943041    8.586501
               13  |    2.27604   .0646482    35.21   0.000     2.149332    2.402748
               14  |   .3652253   .0725625     5.03   0.000     .2230055    .5074451
               15  |   1.906472    .092928    20.52   0.000     1.724337    2.088608
               16  |   3.477835    .154322    22.54   0.000     3.175369      3.7803
               17  |   4.457899   .1004218    44.39   0.000     4.261076    4.654722
               18  |   .1474848    .062419     2.36   0.018     .0251458    .2698238
               19  |   1.072128   .0597847    17.93   0.000     .9549518    1.189303
               20  |   1.615142   .0617859    26.14   0.000     1.494044    1.736241
               21  |   .8575779   .1056763     8.12   0.000     .6504562      1.0647
               22  |   2.828905   .0946447    29.89   0.000     2.643405    3.014406
               23  |   2.087886   .0921479    22.66   0.000      1.90728    2.268493
               24  |   3.890447   .0969822    40.12   0.000     3.700366    4.080529
               25  |   7.722447   .1986124    38.88   0.000     7.333174     8.11172
               26  |   2.307994   .0961905    23.99   0.000     2.119464    2.496524
               27  |  -1.948226   .0587524   -33.16   0.000    -2.063379   -1.833074
               28  |   2.772034   .1243572    22.29   0.000     2.528299     3.01577
               29  |   2.152383   .0757696    28.41   0.000     2.003877    2.300889
               30  |   3.788775   .1011858    37.44   0.000     3.590454    3.987095
               31  |   4.658553   .1534057    30.37   0.000     4.357883    4.959222
               32  |   5.213811   .1362273    38.27   0.000      4.94681    5.480812
               33  |   5.716709   .0623063    91.75   0.000     5.594591    5.838827
               34  |   4.362383   .1426449    30.58   0.000     4.082804    4.641962
               35  |   8.293418   .0903492    91.79   0.000     8.116337    8.470499
               36  |   2.588986   .1054642    24.55   0.000      2.38228    2.795692
               37  |   3.055802   .1149653    26.58   0.000     2.830474     3.28113
               38  |   3.666222   .1312912    27.92   0.000     3.408896    3.923548
               39  |  -.8992449   .0596531   -15.07   0.000    -1.016163   -.7823269
               40  |   .4432902    .059064     7.51   0.000      .327527    .5590534
               41  |   2.690753   .0668766    40.23   0.000     2.559678    2.821829
               42  |   2.282115   .1333772    17.11   0.000     2.020701     2.54353
               43  |   4.281511   .1434794    29.84   0.000     4.000297    4.562726
               44  |   .8252661   .0671542    12.29   0.000     .6936463    .9568859
               45  |   .5749851   .0842814     6.82   0.000     .4097965    .7401737
               46  |   5.236055   .1475543    35.49   0.000     4.946854    5.525256
               47  |   2.442306   .0869076    28.10   0.000     2.271971    2.612642
               48  |   4.474086   .1227764    36.44   0.000     4.233449    4.714723
               49  |   4.963385   .1648171    30.11   0.000      4.64035    5.286421
               50  |   2.851285   .1036398    27.51   0.000     2.648154    3.054415
               51  |    3.36449   .0891324    37.75   0.000     3.189794    3.539187
               52  |   2.192825   .0979006    22.40   0.000     2.000943    2.384706
               53  |   4.341262   .1238963    35.04   0.000      4.09843    4.584094
               54  |   3.237197   .1057529    30.61   0.000     3.029925    3.444469
               55  |   2.469389   .0933055    26.47   0.000     2.286513    2.652264
               56  |   2.507486   .1144083    21.92   0.000      2.28325    2.731722
               57  |   2.936069   .1140125    25.75   0.000     2.712609    3.159529
               58  |   3.869468   .1220904    31.69   0.000     3.630175    4.108761
               59  |   4.846872   .1733468    27.96   0.000     4.507119    5.186626
               60  |   5.073226   .1565876    32.40   0.000      4.76632    5.380133
               61  |   3.950464   .1466366    26.94   0.000     3.663062    4.237867
               62  |   5.335386   .1646221    32.41   0.000     5.012733     5.65804
               63  |   3.335438   .1166738    28.59   0.000     3.106762    3.564115
               64  |   1.736917   .0646402    26.87   0.000     1.610224    1.863609
               65  |   4.779294    .169642    28.17   0.000     4.446801    5.111786
               66  |  -.4668238   .0590378    -7.91   0.000    -.5825358   -.3511117
               67  |   5.257302   .1639079    32.07   0.000     4.936048    5.578555
               68  |   1.576727   .0879242    17.93   0.000     1.404399    1.749055
               69  |   .3090506   .0600119     5.15   0.000     .1914294    .4266719
               70  |   1.437396    .073565    19.54   0.000     1.293211     1.58158
               71  |   3.273535   .1170351    27.97   0.000      3.04415    3.502919
               72  |  -.7049707   .0609972   -11.56   0.000    -.8245231   -.5854183
               73  |  -3.563726   .1997316   -17.84   0.000    -3.955193   -3.172259
               74  |   5.183883   .1743299    29.74   0.000     4.842203    5.525564
               75  |  -.6566536   .0622262   -10.55   0.000    -.7786147   -.5346925
               76  |   2.746813   .1191671    23.05   0.000     2.513249    2.980376
               77  |   -.313813   .0603515    -5.20   0.000    -.4320998   -.1955262
               78  |   3.193312    .095505    33.44   0.000     3.006125    3.380498
               79  |   .8159879   .0585874    13.93   0.000     .7011587    .9308171
               80  |   .7335282   .0637813    11.50   0.000     .6085192    .8585371
               81  |   1.191529   .0660116    18.05   0.000     1.062148    1.320909
               82  |   5.081496   .1765555    28.78   0.000     4.735453    5.427538
               83  |   2.299777   .0836186    27.50   0.000     2.135887    2.463666
               84  |   2.168748   .1009118    21.49   0.000     1.970964    2.366531
               85  |   1.692805   .0863317    19.61   0.000     1.523598    1.862012
               86  |  -1.182553    .062998   -18.77   0.000    -1.306027   -1.059079
               87  |   1.900393   .1155495    16.45   0.000     1.673921    2.126866
               88  |   2.400692   .1231804    19.49   0.000     2.159263    2.642121
               89  |   1.324928   .1699009     7.80   0.000     .9919285    1.657928
               90  |   1.636154    .108001    15.15   0.000     1.424475    1.847832
               91  |   2.644196   .1049861    25.19   0.000     2.438427    2.849965
               92  |   2.559138   .1050926    24.35   0.000      2.35316    2.765116
               93  |   .6557033   .0830874     7.89   0.000     .4928551    .8185515
               94  |   1.804883   .0773295    23.34   0.000      1.65332    1.956447
               95  |   3.723468   .1015475    36.67   0.000     3.524439    3.922498
               96  |   4.452104   .1264265    35.21   0.000     4.204313    4.699895
               97  |   4.481492   .1409598    31.79   0.000     4.205215    4.757768
               98  |   3.867754   .1619334    23.88   0.000      3.55037    4.185137
               99  |   5.432618   .1626429    33.40   0.000     5.113844    5.751392
              100  |   4.777885     .14085    33.92   0.000     4.501824    5.053946
              101  |   4.640294     .09754    47.57   0.000     4.449119    4.831469
              102  |   1.036152   .0766087    13.53   0.000     .8860018    1.186302
              103  |   2.287926   .1116764    20.49   0.000     2.069045    2.506808
              104  |    2.30747    .067969    33.95   0.000     2.174253    2.440687
              105  |   1.304788   .0644328    20.25   0.000     1.178502    1.431074
              106  |   8.128763     .20606    39.45   0.000     7.724892    8.532633
              107  |   4.213346   .1391939    30.27   0.000     3.940531    4.486161
              108  |    3.40191   .1033008    32.93   0.000     3.199444    3.604376
              109  |  -.0648071   .0617585    -1.05   0.294    -.1858514    .0562373
              110  |   .4993205   .0657721     7.59   0.000     .3704095    .6282314
              111  |   2.668047    .128321    20.79   0.000     2.416542    2.919551
              112  |   5.141413   .1490727    34.49   0.000     4.849236     5.43359
              113  |   3.290843   .1258178    26.16   0.000     3.044244    3.537441
              114  |    3.64314   .1145489    31.80   0.000     3.418628    3.867652
              115  |   2.680405   .0762075    35.17   0.000     2.531041    2.829769
              116  |   4.329355   .1579936    27.40   0.000     4.019693    4.639016
              117  |   3.363536   .1114117    30.19   0.000     3.145173    3.581899
              118  |   3.804646   .1057696    35.97   0.000     3.597342    4.011951
              119  |   1.083082   .0626813    17.28   0.000     .9602289    1.205935
              120  |   3.627315   .1529941    23.71   0.000     3.327453    3.927178
              121  |    4.53954   .1645105    27.59   0.000     4.217105    4.861975
              122  |   .6943768   .0591901    11.73   0.000     .5783664    .8103872
              123  |   2.263076   .0972707    23.27   0.000     2.072429    2.453723
              124  |   2.743639    .142672    19.23   0.000     2.464007    3.023271
              125  |   2.281054    .111463    20.46   0.000     2.062591    2.499518
              126  |   3.364248   .0883373    38.08   0.000      3.19111    3.537386
              127  |   1.418029   .0780389    18.17   0.000     1.265075    1.570982
              128  |   .5589294   .0659305     8.48   0.000      .429708    .6881508
              129  |   1.765455   .0805962    21.90   0.000      1.60749    1.923421
              271  |   1.598469   .0767154    20.84   0.000      1.44811    1.748829
                   |
             _cons |   2.547114   .1084305    23.49   0.000     2.334594    2.759634
-------------------+----------------------------------------------------------------
           sigma_u |          0
           sigma_e |   .1706838
               rho |          0   (fraction of variance due to u_i)
------------------------------------------------------------------------------------
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