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Re: st: ladder question for right-skewed variable


From   Gabriel Nelson <lgabrielnelson@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ladder question for right-skewed variable
Date   Fri, 26 Apr 2013 10:55:26 -0700

Thanks Nick, yes exactly, my question is why the ladder function fails
to provide any chi-square values here. I'll attach the Stata output
here:

. ladder disp_2000

Transformation         formula               chi2(2)       P(chi2)
------------------------------------------------------------------
cubic                  dis~2000^3                 .            .
square                 dis~2000^2                 .            .
identity               dis~2000                   .            .
square root            sqrt(dis~2000)             .        0.000
log                    log(dis~2000)              .        0.000
1/(square root)        1/sqrt(dis~2000)           .        0.000
inverse                1/dis~2000                 .        0.000
1/square               1/(dis~2000^2)             .        0.000
1/cubic                1/(dis~2000^3)             .        0.000

. sum disp_2000, detail

      Number displaced 2000 (if data unavailable go up
                           to 2003
-------------------------------------------------------------
      Percentiles      Smallest
 1%            1              1
 5%            2              1
10%            3              1       Obs                1010
25%            6              1       Sum of Wgt.        1010

50%         15.5                      Mean           281.5297
                        Largest       Std. Dev.      1217.168
75%           82           9421
90%        436.5           9505       Variance        1481497
95%         1251          16255       Skewness       9.012044
99%         5953          19569       Kurtosis       108.8061

On Fri, Apr 26, 2013 at 10:47 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> Please see my answers too. You have still not given the exact -ladder-
> command you used or its output, so it is really difficult to know what
> is going on.
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/



-- 
Gabriel Nelson
Doctoral Candidate
Dept. of Sociology
University of California- Los Angeles
http://www.soc.ucla.edu/people/graduate-student?lid=4344
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


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