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Re: st: Margins error
From
Issa Kohler-Hausmann <[email protected]>
To
[email protected]
Subject
Re: st: Margins error
Date
Sun, 1 Jul 2012 16:08:24 -0400
Thank you!
On Jul 1, 2012, at 11:57 AM, William Buchanan wrote:
> Assuming you are using Stata 12, you might want to try dropping the -xi:- prefix to your command. You'll still want to keep the -i.- prefix for your variables.
>
> HTH,
> Billy
>
> Sent from my iPhone
>
> On Jul 1, 2012, at 8:39, Issa Kohler-Hausmann <[email protected]> wrote:
>
>> Hello -
>>
>> I am sorry if this is a dumb question but I have having trouble with the "margins" command after running a logistic regression and I cannot figure out what I am misunderstanding.
>>
>> I am trying to graph the effect of the number of misdemeanor convictions (p_misdcon_cat) on the likelihood of conviction to a misdemeanor crime (outcome --> convict_Misd). The problem (it seems to me) is that STATA does not recognize the variables for purposes of the margins command that were generated using xi. logit and I don't know any other way of doing this. It also seems from all of the examples online that this should work.
>>
>> I ran the following logic model:
>>
>> . xi: logit convict_Misd i.race_eth_cat male p_felcon i.p_misdcon_cat arrestnum_cat MisdArr, cluster(my_case_id)
>>
>> I then get the following errors when I try the margins command evaluated at specified levels of my covariates.
>>
>> . margins, dydx(p_misdcon_cat) at (_Irace_eth__2=1 male=1 p_felcon=0 arrestnum_cat=4 MisdArr=1)
>> 'p_misdcon_cat' not found in list of covariates
>> r(322);
>>
>> .
>> . margins p_misdcon_cat, at (_Irace_eth__2=1 male=1 p_felcon=0 arrestnum_cat=4 MisdArr=1)
>> 'p_misdcon_cat' not found in list of covariates
>> r(322);
>>
>> Any help would be greatly appreciated!
>>
>> Thank you
>>
>>
>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/statalist/faq
>> * http://www.ats.ucla.edu/stat/stata/
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/