st: re: user-written commands and vce() support

[Kit Baum <baum@bc.edu>]

<   >

Richard wrote:

One of the things that impresses me about Stata is that it is easy to
write ml programs for it that support all sorts of options (including
many that I have no idea what they do!)  Anyway, one of my programs
is called oglm (available from SSC), and the following two commands  
both work:

oglm  warm yr89 male, vce(oim)
oglm  warm yr89 male, vce(robust)

Alas, the following does not:

. oglm  warm yr89 male, vce(bootstrap)
vcetype 'bootstrap' not allowed

So, my question is, what do I need to do to tweak my programs to
support more of the vce options?
I don't explicitly define vce as an option in my program.  Instead,
the option gets captured by this command:

mlopts ml_options, `options'

Is mlopts letting some vce options through while blocking others?



help mlopts says

  mlopts is required and will contain those options that the ml  
command recognizes as maximize
        options.  Options returned in mlopts are

        trace gradient hessian showstep technique(algorithm_specs)  
vce(oim|opg|robust)
...

and does not list vce(bootstrap) as one of the choices.

Kit


Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html


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