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Re: st: RE: bootstrap gives errors with -rd-
From
Austin Nichols <[email protected]>
To
[email protected]
Subject
Re: st: RE: bootstrap gives errors with -rd-
Date
Sat, 12 Nov 2011 23:03:00 -0500
D-Ta <[email protected]>
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 <[email protected]> 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
>> [email protected]
>>
>> 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?
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