Dear Nick,
sorry this question, my poor knowledge of Stata or the english language, oks?
But what�s svy sawy?
I know what is svy, of course.
Best,
Joao Ricardo
2008/6/24, Nick Cox <[email protected]>:
> Thanks for the correction to your previous post.
>
> The same point applies. It is not -sepov- doing this, but whatever it calls.
>
> Someone else -svy-savvy may be able to help with your main problem.
>
> Nick
> [email protected]
>
> Joao Ricardo F. Lima
>
> Thanks Nick,
>
> actually, sepov store the values of FGT in e(b), not in e(V). See:
>
> sepov renagr_nag rennag if famtipo == 1 [w=pesopes2], p(120)
> strata(strat) psu(psu) ci meff
> (sampling weights assumed)
>
> Poverty measures for the variable renagr_nag: (unlabeled)
>
> Survey mean estimation
>
> pweight: pesopes2 Number of obs =
> 849
> Strata: strat Number of strata =
> 43
> PSU: psu Number of PSUs =
> 153
> Population size =
> 394883.36
>
> ------------------------------------------------------------------------------
> Mean | Estimate Std. Err. [95% Conf. Interval] Meff
> ---------+--------------------------------------------------------------------
> p0 | .1953685 .0173466 .1609916 .2297453 1.644852
> p1 | .0671076 .0064495 .0543262 .079889 1.270128
> p2 | .0327589 .0037762 .0252754 .0402425 1.198951
> ------------------------------------------------------------------------------
>
>
> Poverty measures for the variable rennag: (unlabeled)
>
> Survey mean estimation
>
> pweight: pesopes2 Number of obs =
> 849
> Strata: strat Number of strata =
> 43
> PSU: psu Number of PSUs =
> 153
> Population size =
> 394883.36
>
> ------------------------------------------------------------------------------
> Mean | Estimate Std. Err. [95% Conf. Interval] Meff
> ---------+--------------------------------------------------------------------
> p0 | .0649527 .0079664 .0491652 .0807402 .9895778
> p1 | .0218262 .0033303 .0152263 .0284261 1.086596
> p2 | .0098536 .002091 .0057097 .0139976 1.136367
> ------------------------------------------------------------------------------
>
> . matrix list e(b)
>
> e(b)[1,3]
> p0 p1 p2
> y1 .0649527 .02182618 .00985364
>
>
> I want to compare if 0.0649527 = 0.1953685 statistically, but don�t
> known how to do this.
>
> 2008/6/24 Nick Cox <[email protected]>:
>> Standard advice for this list (more usually ignored than not) is to say
>> where user-written stuff you are using comes from.
>>
>> -sepov- has this source
>>
>> STB-51 sg117 . . Robust std errors for Foster-Greer-Thorbecke poverty
>> indices
>> (help sepov if installed) . . . . . . . . D. Jolliffe and A.
>> Semykina
>> 9/99 pp.34--36; STB Reprints Vol 9, pp.200--203
>> provides estimates of standard errors for the Foster-Greer-
>> Thorbecke class of poverty indices; handles complex survey
>> designs including stratification and multi-stages
>>
>> and evidently the authors have moved since then.
>>
>> A Google for Dean Jolliffe seems to yield a direct hit. I don't know Dean
>> and have no way of knowing whether he still supports -sepov-.
>>
>> But the code remains accessible. -viewsource sepov.ado- and you can look
>> at the code and have a stab at answering your own question. You will see
>> that your statement is not quite correct. -epov- is not eclass and does
>> not store anything in e(). Whatever e(V) you see is left over from
>> -svymean-, or so I guess. This may help you move forward.
>>
>> Nick
>> [email protected]
>>
>> Joao Ricardo F. Lima
>>
>> I'm writing because I want an advice. I'm using sepov to get FGT
>> indexes for two variables. After estimation I would like to compare if
>> the results are statistical different. I am trying to use "lincom",
>> but unsucessfull because sepov stores in e(V) only the estimation for
>> the last variable, isn�t it?
>>
>> I am doing this:
>>
>> sepov var1 var2 , p(pl) psu (psu) strat (strat) ci meff
>>
>> And I would like something like this
>>
>> lincom p0[var1] - p0[var2]
>>
>> How can I do this? Is there another way to test if the values of FGT
>> indexes are the same?
>>
>> I wrote to sepov authors, but their email address change.
>>
>> The error that the other server returned was: 550 550 5.1.1 Mailbox
>> <[email protected]> does not exist (state 14).
>> The error that the other server returned was: 550 550 5.1.1 Mailbox
>> <[email protected]> does not exist (state 14).
>
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>
--
-------------------------------
Joao Ricardo Lima
Professor
UFPB-CCA-DCFS
+553138923914
-------------------------------
*
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