Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: RE: bootstrap gives errors with -rd-


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: bootstrap gives errors with -rd-
Date   Sat, 12 Nov 2011 23:03:00 -0500

D-Ta <altruist81@gmx.de>

The help file, refs, and prior posts make clear that the assignment
variable Z should always appear last in the variable list:

bootstrap, rep(200) : rd Y Z

Are you using the latest version?

ssc inst rd, replace

On Sat, Nov 12, 2011 at 12:43 PM, D-Ta <altruist81@gmx.de> wrote:
> sorry... -rd- stands for regression discontinuity and is a user written
> command by Austin Nichols.
>
> Darjusch
>
> Am 11.11.2011 20:09, schrieb Nick Cox:
>>
>> ... and -rd- is ?
>>
>> Nick
>> n.j.cox@durham.ac.uk
>>
>> D-Ta
>>
>> I have the following problem.
>>
>> I use the -rd- command to estimate a local effect of  (a treatment) X on
>> outcomes Y (several ouotcomes, some binary and some continous) at Z=0 in
>> the following way:
>>
>> bootstrap, rep(200) : rd Y X, n(50)
>>
>> where X=1 if Z>=0 and X=0 if Z<0.
>>
>> Z takes the values: -12 , -11.5, -11, .... ,-0.5, 0, 0.5, 1, ...,12
>> Around the cut-off value I have 15-20 observations in each category of Z.
>>
>> When I run the command I get a lot of bootstrap replications that fail
>> (red X). This is more so for binary outcomes! I also tried to use
>> -bootstrap, strata(Z) rep(200)-  but the problem remains.
>>
>> Can someone explain what I do wrong?

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index