Thanks Maarten,
but expand command just duplicate each observation.It's not a random
resampling.
Do you think could be enough to make a bit of inference on my proportion?
Vincenzo
2008/7/10 Maarten buis <[email protected]>:
> I would do the following before starting to mess with stuff like the
> bootstrap:
>
> expand nnoti
> proportion esenti
>
> -- Maarten
>
> --- Vincenzo Carrieri <[email protected]> wrote:
>> I have the following stata output:
>>
>> > esenti = 0
>>
>> Variable | Obs Mean Std. Dev. Min
>> Max
>> ______________________________________________________
>> nnotti | 1032 4.545543 4.936243 1
>> 80
>>
>> -> esenti = 1
>>
>> Variable | Obs Mean Std. Dev. Min
>> Max
>> __________________________________________________________
>> nnotti | 3125 9.78528 12.73163 1
>> 90
>>
>>
>> "Esenti" is a dummy variable that indicates if a person copayment
>> free
>> or not. "nnotti" are the numbers of days spent in a hospital.
>> So, the total number of nights, are 1032 (Obs) x 4.545543 + 3125 X
>> 9.78528 = 35270
>> I wish to calculate the proportion of nights spent by esenti=1 out
>> of
>> total nights. I compute simply this proportion, but It's just a
>> sample
>> proportion. Is it meaningful to randomly replicate my sample 1000
>> times and compute my proportion for each of these samples? It allows
>> me to have a range of values of my proportion and not only a single
>> sample value. I think this should be bootstrapping, but I don't have
>> a
>> deep knowledge about this argument. If yes, how to do it on stata?
>>
>> I appreciate any advice or comment.
>> Many thanks,
>>
>> Vincenzo
>> *
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>>
>
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
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>
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>
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*
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