Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Estimating SEM with Dummy


From   William Buchanan <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: st: Estimating SEM with Dummy
Date   Sun, 30 Mar 2014 16:03:22 -0500

John's example was a simple linear regression.  Again, you really should provide more information about exactly what you are trying to do.  The error message you received means that the values Stata chose by default for the starting values weren't good. You can either try specifying starting values for the model manually or it's possible that the -difficult- option for MLE algorithm could alleviate the problem.  However, if you have a series of dummy variables (e.g., already coded as 0|1), then the xi: prefix isn't doing anything.  If, instead, you have a series of nominal variables with several categories you could use the generate option of -tabulate- to create your dummy variables.  

HTH,
Billy

Sent from my iPhone

> On Mar 30, 2014, at 15:42, Theophilus Dapel <[email protected]> wrote:
> 
> Dear John,
> I applied the option you gave, thanks.
> 
> But I got an error message: initial values not feasible
>> On 30 Mar 2014, at 17:07, John Antonakis <[email protected]> wrote:
>> 
>> Hi:
>> 
>> In terms of controls, that is, right hand side variables. Just do as you would normally:
>> 
>> xi: sem (y <- x z i.dummy)
>> 
>> Stata will generate k-1 dummies for you, like with other estimators.
>> 
>> Best,
>> J.
>> 
>> __________________________________________
>> 
>> John Antonakis
>> Professor of Organizational Behavior
>> Director, Ph.D. Program in Management
>> 
>> Faculty of Business and Economics
>> University of Lausanne
>> Internef #618
>> CH-1015 Lausanne-Dorigny
>> Switzerland
>> Tel ++41 (0)21 692-3438
>> Fax ++41 (0)21 692-3305
>> http://www.hec.unil.ch/people/jantonakis
>> 
>> Associate Editor:
>> The Leadership Quarterly
>> Organizational Research Methods
>> __________________________________________
>> 
>>> On 30.03.2014 16:38, Theophilus Dapel wrote:
>>> Dear User of Stata,
>>> Any assistance on how to estimate a SEM with dummies in the list of control variables?
>>> 
>>> Thanks,
>>> Dapel
>>> *
>>> *   For searches and help try:
>>> *   http://www.stata.com/help.cgi?search
>>> *   http://www.stata.com/support/faqs/resources/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/faqs/resources/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/faqs/resources/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/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index