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Re: st: Using mkmat with a local as the varlist
From
William Buchanan <[email protected]>
To
[email protected]
Subject
Re: st: Using mkmat with a local as the varlist
Date
Fri, 8 Mar 2013 14:15:31 -0800
Slight correction:
> webuse hsng2
> ivregress 2sls rent pcturban (hsngval = faminc region), small
> ereturn li
> loc instruments `e(insts)'
> di `"`instruments'"'
mkmat `instruments', matrix(B)
Apparently -mkmat- does not like factor variables.
On Mar 8, 2013, at 2:13 PM, William Buchanan <[email protected]> wrote:
> webuse hsng2
> ivregress 2sls rent pcturban (hsngval = faminc i.region), small
> ereturn li
> loc instruments `e(insts)'
> di `"`instruments'"'
>
> You weren't referencing the _macro_ where the variable names were stored correctly.
>
> HTH,
> Billy
>
>
> On Mar 8, 2013, at 2:05 PM, Mauricio Esteban Cuak <[email protected]> wrote:
>
>> Hi,
>>
>> I'm trying to save the lists of variables from a macro as an argument
>> for the mkmat command.
>> Here is an example of the use I'm trying to give:
>>
>> ******** Begin Code**************
>>
>> sysuse auto, replace
>>
>> foreach v of var * {
>> drop if missing(`v')
>> }
>>
>> qui ivregress gmm price trunk (weight = turn length )
>>
>> /* Now i'd like to construct a matrix with the instruments */
>>
>> /* This works: */
>>
>> mkmat trunk turn length, matrix(A)
>>
>> /* But this doesn't: */
>>
>> local instruments e(insts)
>>
>> mkmat `instruments', matrix(B)
>>
>>
>> ***** End of code ********
>>
>> I've tried different ways to define the local but I haven't been able
>> to make it work. I think the problem is mkmat takes `instruments' as a
>> string and not as
>> a list of variables, but I don't know how to fix it...
>>
>> Thanks for your time,
>>
>> M.C.
>> *
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>> * http://www.ats.ucla.edu/stat/stata/
>
>
> *
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*
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