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Re: st: Varying results for levpet


From   SAM McCaw <sam2stata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Varying results for levpet
Date   Wed, 10 Oct 2012 00:43:47 -0400

Thank you.

Sent from my iPad

On Oct 8, 2012, at 9:22 AM, "Brian P. Poi" <bpoi@stata.com> wrote:

> On 10/05/2012 04:38 PM, SAM MCCAW wrote:
>> Hi All,
>> 
>> I have run into an issue with my stata results when I run levpet
>> industry by industry.
>> 
>> When I run the following command for Levihnson-Petrin I get different
>> results each time.
>> 
>> eststo: levpet lnY if industry_no == 1, free (lnl) proxy (lnM) capital
>> (lnK1) revenue
>> 
>> For example, the first and second set of results are posted below. Is
>> this a similar effect to bootstrapping?
>> 
>> Thanks a lot.
>> 
>> SAM
> 
> Sam,
> 
> -levpet- uses the bootstrap to obtain the standard errors, so you will get different standard errors each time unless you first set the random-number seed.  See -help seed- for information about setting the random-number seed.
> 
>   -- Brian Poi
>   -- bpoi@stata.com
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