A problem I can see is that -bootstrap-
requires an expression list telling it what
it is that -withinyear- leaves behind
in memory which it should use, but you
don't give one. -bootstrap- in essence
is totally in ignorance about which
results it should use.
A quite different issue is the appropriateness of
bootstrapping for time series, if that is what
your data are. This has been discussed
quite a lot on Statalist in the last few weeks.
Nick
[email protected]
Chintrakarn, Pandej
> Please set aside your time to look at my program.
> I try to run the program on bootstraping eventually to
> obtain the standard deviation of "att"(average treatement
> effect on treated). In addition my att is computed with
> controlling for the "year" variable to control for unobserved
> time effects.
>
> Somehow the output reports
> command -> withinyear
> an error occurred when command was executed on original dataset
> please rerun bootstrap and specify the trace option to
> see a trace of the commands bootstrap executed
> r(198);
>
> I have no clue what goes wrong with this.
> My do-file is the following..
>
> adopath + c:\
> bootstrap withinyear, reps(500) saving(c:\results) replace
>
> My program is version 8.2 (last updated). my
> "ado" file is also saved in c:\.
>
> program define withinyear
> version 7.0
> if "`1'" == "?" {
> global S_1 "a1"
> exit
> }
> tempvar x y0
> tempname att
> capture{
> psmatch2 D1 x1 x2 x3 if year==1999, ate logit out( y)
> rename _y `y0'
> psmatch2 D1 x1 x2 x3 if year==2000, ate logit out( y)
> replace `y0'=_y if year==2000 & _treated==1
> psmatch2 D1 x1 x2 x3 if year==2001, ate logit out( y)
> replace `y0'=_y if year==2001 & _treated==1
> psmatch2 D1 x1 x2 x3 if year==2002, ate logit out( y)
> replace `y0'=_y if year==2002 & _treated==1
> gen `x'=y -`y0'
> summarize `x'
> scalar `att'=r(mean)
> }
> if _rc==0 {post `1' (`att')}
> end
>
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