Dear Maarten,
when I'm typing xtdescribe for my dataset I get the following output:
. xtdescribe
coid: 1, 2, ..., 30 n = 30
year: 1950, 1951, ..., 2005 T = 56
Delta(year) = 1 unit
Span(year) = 56 periods
(coid*year uniquely identifies each observation)
Distribution of T_i: min 5% 25% 50% 75% 95% max
56 56 56 56 56 56 56
Freq. Percent Cum. | Pattern
------------------------+----------------------------------------------------------
30 100.00 100.00 |
11111111111111111111111111111111111111111111111111111
---------------------------+----------------------------------------------------------
30 100.00
|XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Does this tell you something I haven't recognized yet?
I also typed "sum if year >=1990" because this is the time span (1990-2005)for
which I'm doing my regressions at the moment. The least numbers of observations
for a single variable that stata returns is 85 (see below).
Do you have any suggestions?
Jessica
. sum if year >=1990
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
coid | 480 15.5 8.664472 1 30
eu_15 | 480 .5 .5005216 0 1
year | 480 1997.5 4.614582 1990 2005
corprate | 366 33.99372 5.663233 16 50
persrate | 268 44.28313 9.637002 13 68
-------------+--------------------------------------------------------
vatrate | 436 17.50532 5.693931 3 25
pitr | 85 17.00588 9.002372 4.6 41
cetr | 204 26.71569 7.652872 10 43.7
ketg | 204 22.23529 5.554781 11.1 37.4
nwlc | 204 23.36667 8.837636 4.1 41
-------------+--------------------------------------------------------
hbs | 474 -.4729114 6.205395 -63.96 16.16
fdiout | 450 15767.68 33245.51 -11067 252012
fdiin | 450 12668.6 30055.53 -38581 321274
fdioutp | 450 124818.3 261967.7 0 2069013
fdiinp | 450 96719.37 196991.8 0 1553955
-------------+--------------------------------------------------------
gdp1955_2005 | 480 34067.26 127258.6 .39306 806621.9
toexp | 245 2.93e+11 2.24e+12 1.08e+07 2.95e+13
toexpppp | 245 1.58e+12 7.82e+12 1.10e+07 6.19e+13
lbs | 433 -6.227229 75.19171 -791.5 172.16
cpiti | 320 7.017344 2.086486 2.66 10
-------------+--------------------------------------------------------
totrev | 463 481001.3 940469.4 78.7146 8091442
totaltaxgdp | 463 35.67134 7.816183 16.57135 53.38145
t1000gdp | 462 12.81689 5.196823 4.047751 30.31366
t1100gdp | 462 9.469915 4.958679 0 26.37211
t1200gdp | 462 2.974308 1.556358 0 12.81173
-------------+--------------------------------------------------------
t2000gdp | 462 9.03067 5.152212 0 18.86867
t3000gdp | 446 .3676013 .7287513 0 5.821948
t4000gdp | 462 1.88998 1.048129 0 8.41538
t5000gdp | 462 11.20277 2.966812 3.970961 17.90243
t5111gdp | 462 6.187076 3.719843 0 62.55744
-------------+--------------------------------------------------------
t5112gdp | 462 .2805195 .8740527 0 8.396804
t5120gdp | 462 3.954499 1.534671 0 9.740898
t6000gdp | 462 .1375409 .3561737 0 2.448328
dirtgdp | 462 24.09241 6.522121 7.083571 40.22071
indirtgdp | 462 11.20277 2.966812 3.970961 17.90243
-------------+--------------------------------------------------------
(shortened)
Zitat von Maarten buis <[email protected]>:
> --- Maarten Buis asked:
> > Are you using -xtreg- with the -fe- option to estimate your fixed
> > effects model?
>
> --- Jessica Oelschlaeger wrote:
> > Yes, I do.
>
> Than I am confused, -xtreg- with -fe- does not require balanced data,
> so you should not loose that many units. See the example below:
>
> *--------------- begin example -------------
> webuse nlswork, clear
> xtdescribe
> xtreg ln_w union south ttl_exp age , fe
> *----------------- end example -------------
>
> -- Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
> __________________________________________________________
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>
> *
> * For searches and help try:
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> * http://www.ats.ucla.edu/stat/stata/
>
--
Dipl. oec. Jessica �lschl�ger
Forschungsstelle Europ�ische Integration
Universtit�t Hohenheim
mailto:[email protected]
*
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