Hello
I am studying about the dynamic panel with `xtabond`
According to Stata manual xtxtabond.pdf (stata.com)
Output:
However, when I try to run a similar code
Output:
I don't know why the result is different.
I am studying about the dynamic panel with `xtabond`
According to Stata manual xtxtabond.pdf (stata.com)
Code:
xtabond n l(0/1).w l(0/2).(k ys) yr1980-yr1984 year, lags(2) noconstant
Code:
Arellano–Bond dynamic panel-data estimation Number of obs = 611
Group variable: id Number of groups = 140
Time variable: year
Obs per group:
min = 4
avg = 4.364286
max = 6
Number of instruments = 41 Wald chi2(16) = 1757.07
Prob > chi2 = 0.0000
One-step results
------------------------------------------------------------------------------
n | Coefficient Std. err. z P>|z| [95% conf. interval]
-------------+----------------------------------------------------------------
n |
L1. | .6862261 .1486163 4.62 0.000 .3949435 .9775088
L2. | -.0853582 .0444365 -1.92 0.055 -.1724523 .0017358
|
w |
--. | -.6078208 .0657694 -9.24 0.000 -.7367265 -.4789151
L1. | .3926237 .1092374 3.59 0.000 .1785222 .6067251
|
k |
--. | .3568456 .0370314 9.64 0.000 .2842653 .4294259
L1. | -.0580012 .0583051 -0.99 0.320 -.172277 .0562747
L2. | -.0199475 .0416274 -0.48 0.632 -.1015357 .0616408
|
ys |
--. | .6085073 .1345412 4.52 0.000 .3448115 .8722031
L1. | -.7111651 .1844599 -3.86 0.000 -1.0727 -.3496304
L2. | .1057969 .1428568 0.74 0.459 -.1741974 .3857912
|
yr1980 | .0029062 .0212705 0.14 0.891 -.0387832 .0445957
yr1981 | -.0404378 .0354707 -1.14 0.254 -.1099591 .0290836
yr1982 | -.0652767 .048209 -1.35 0.176 -.1597646 .0292111
yr1983 | -.0690928 .0627354 -1.10 0.271 -.1920521 .0538664
yr1984 | -.0650302 .0781322 -0.83 0.405 -.2181665 .0881061
year | .0095545 .0142073 0.67 0.501 -.0182912 .0374002
------------------------------------------------------------------------------
Instruments for differenced equation
GMM-type: L(2/.).n
Standard: D.w LD.w D.k LD.k L2D.k D.ys LD.ys L2D.ys D.yr1980
D.yr1981 D.yr1982 D.yr1983 D.yr1984 D.year
However, when I try to run a similar code
Code:
xtabond n l.n l2.n w l.w k l.k l2.k ys l.ys l2.ys yr1980-yr1984 year, noconstant
Code:
note: L.n omitted because of collinearity.
Arellano–Bond dynamic panel-data estimation Number of obs = 611
Group variable: id Number of groups = 140
Time variable: year
Obs per group:
min = 4
avg = 4.364286
max = 6
Number of instruments = 42 Wald chi2(16) = 2244.24
Prob > chi2 = 0.0000
One-step results
------------------------------------------------------------------------------
n | Coefficient Std. err. z P>|z| [95% conf. interval]
-------------+----------------------------------------------------------------
n |
L1. | .1653985 .0417079 3.97 0.000 .0836526 .2471444
L2. | -.0630636 .0389283 -1.62 0.105 -.1393617 .0132345
|
w |
--. | -.5501356 .0564937 -9.74 0.000 -.6608611 -.43941
L1. | .0830758 .0620022 1.34 0.180 -.0384463 .204598
|
k |
--. | .3888834 .0318344 12.22 0.000 .3264892 .4512777
L1. | .1036699 .0340821 3.04 0.002 .0368701 .1704696
L2. | .0543961 .0322247 1.69 0.091 -.0087632 .1175554
|
ys |
--. | .5090537 .1165611 4.37 0.000 .2805982 .7375093
L1. | -.3438416 .1374004 -2.50 0.012 -.6131414 -.0745419
L2. | .0262095 .1248746 0.21 0.834 -.2185403 .2709593
|
yr1980 | .0083141 .0187634 0.44 0.658 -.0284615 .0450898
yr1981 | -.0185371 .0309234 -0.60 0.549 -.0791459 .0420717
yr1982 | -.0345602 .0419894 -0.82 0.410 -.116858 .0477376
yr1983 | -.026483 .0545276 -0.49 0.627 -.1333551 .0803892
yr1984 | -.0044671 .06755 -0.07 0.947 -.1368627 .1279285
year | -.0056971 .0120208 -0.47 0.636 -.0292574 .0178632
------------------------------------------------------------------------------
Instruments for differenced equation
GMM-type: L(2/.).n
Standard: LD.n L2D.n D.w LD.w D.k LD.k L2D.k D.ys LD.ys L2D.ys
D.yr1980 D.yr1981 D.yr1982 D.yr1983 D.yr1984 D.year
Comment