Re: st: -mfx- after poisson

[Scott Cunningham <scunning@gmail.com>]

Dear Richard,

Both links are extremely relevant to my problem.  Thank you for  
responding.

scott

On Apr 29, 2006, at 4:52 PM, Richard Williams wrote:


> At 02:32 PM 4/29/2006, you wrote:
> > I have a balanced panel of 3 years with approximately 800 individuals
> > in each year (thus 2400 observations more or less).  I ran a poisson
> > MLE with clustered and robust standard error correction.  There were
> > several variables as regressors, but three worth mentioning (because
> > I think they are causing the problem) are
> >
> > i.year
> > i.fip
> > i.year*i.fip
> >
> > That is, I am controlling for year, state and state-year fixed
> > effects, and am using xi:poisson.
> Some suggestions:
>
> 1) Those interaction terms may cause you grief no matter what you  
> do.  See
>
> http://www.stata.com/support/faqs/stat/mfx_interact.html
>
> 2) Use the -nose- option on mfx.  mfx runs much quicker if you  
> don't calculate standard errors.  Other speeding up suggestions are at
>
> http://www.stata.com/support/faqs/stat/mfx_speed.html
>
> 3) Download and try -margeff-.  It doesn't work with every command,  
> but when it does work it tends to be much quicker than -mfx-.  It  
> will also let you save the marginal effects in a format that is  
> easy to input into -estout-.  Its -dummies- option might be a way  
> of dealing with your interactions.
>
> 4) Yes, prchange is often a very good alternative to -mfx-. That  
> might be the route I would go.
>
> 5) Try -findit marginal effects- to see if something else seems to  
> meet your needs.
>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
> FAX:    (574)288-4373
> HOME:   (574)289-5227
> EMAIL:  Richard.A.Williams.5@ND.Edu
> WWW (personal):    http://www.nd.edu/~rwilliam
> WWW (department):    http://www.nd.edu/~soc
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/