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st: suest testing


From   "Vimalanand S. Prabhu" <prabhu@unc.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: suest testing
Date   Fri, 7 May 2004 17:18:42 -0400

Dear All,

I recently used the suest command for jointly estimating count model of
number of vaccines purchased by both husbands and wives in a household.

After that, I tried to test for the different parameters, separately and
jointly.

i.e.
Ho: Beta1(husband)= Beta1(wife)
Ha: Beta1 (husband) not equal to Beta(wife)

I needed some help in interpretation of the results.

1. If the parameters for say education for both husband and wife are not
significant, and then I get the result that Beta-education (husband) =
Beta-education (wife) cannot be rejected. Does this result have any
significance, or that this test should not be conducted if the parameter is
not significant. If significant, what does this imply? Is it that the number
of vaccines bought by husband with a certain level of education is different
from that by a wife with the same level of education?


2. Later I conducted a joint test of whether all Betas in husband regression
are equal to the respective Betas in wife equation.

i.e.
Ho
Beta (husband)1 = Beta (wife)1
Beta (husband)2 = Beta (wife)2
Beta (husband)3 = Beta (wife)3
:
:


Ha
Beta (husband)1 not equal to Beta (wife)1
Beta (husband)2 not equal to Beta (wife)2
Beta (husband)3 not equal to Beta (wife)3
:
:

And I cannot reject the null hypothesis. What does this interpretation
imply, especially when some of the Betas are not significant? Is it that
overall, the number of vaccines bought by husbands and wives with the same
characteristics is not significantly different from each other?

Thanks,

Prabhu





-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Devra Golbe
Sent: Friday, May 07, 2004 3:28 PM
To: statalist@hsphsun2.harvard.edu
Cc: Devra Golbe
Subject: st: notes lost in append


I would like to append two data files each having notes.  As the output
below indicates,  notes from the "using" file are evidently not retained
when the master file already contains notes on the same variable.  The same
is true for a note attached to the file as a whole:  while it is possible
to have multiple notes, if the master file contains such notes, none are
retained from the using file.

Does anyone know of a work-around?

Thanks,
Devra

-------------------------------------------------------------------------
. use "C:\Stata8\auto.dta"
(1978 Automobile Data)

. keep if foreign==0
(22 observations deleted)

. notes
. note: these are the domestic obs
. note make: TS created in Domestic file
. note price: TS created in Domestic file
. save autoD, replace
file autoD.dta saved

. notes

_dta:
   1.  these are the domestic obs
make:
   1.  7 May 2004 16:19 created in Domestic file
price:
   1.  7 May 2004 16:19 created in Domestic file
. clear

. use "C:\Stata8\auto.dta"
(1978 Automobile Data)

. keep if foreign==1
(52 observations deleted)

. notes

. note: these are the foreign obs
. note: this is a second note attached to the foreign file
. note make: TS created in Foreign file
. note make: this is a 2nd note attached to make in the Foreign file
. note mpg: TS created in foreign file

. save autoF, replace
file autoF.dta saved

. notes
_dta:
   1.  these are the foreign obs
   2.  this is a second note attached to the foreign file
make:
   1.  7 May 2004 16:19 created in Foreign file
   2.  this is a 2nd note attached to make in the Foreign file
mpg:
   1.  7 May 2004 16:19 created in foreign file

. append using "D:\Documents and Settings\Devra\My Documents\TEMP\autoD.dta"
(label origin already defined)

. notes
_dta:
   1.  these are the foreign obs
   2.  this is a second note attached to the foreign file
make:
   1.  7 May 2004 16:19 created in Foreign file
   2.  this is a 2nd note attached to make in the Foreign file
price:
   1.  7 May 2004 16:19 created in Domestic file
mpg:
   1.  7 May 2004 16:19 created in foreign file




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