RE: st: RE: mvreg with vce(robust)?

["Nick Cox" <n.j.cox@durham.ac.uk>]

I don't think -mvreg- can do this. I can't see any sign that -mvreg- uses Mata, so I don't know what to make of your speculation. I guess that you must do these regressions separately. 

Nick 
n.j.cox@durham.ac.uk 

Peter Velte

The issue is as follows: -mvreg- runs much faster on an 8-core server than a loop of -reg- while generating the same results in my case (balanced panel). I assume that is due to the superior parallelization of the Mata code used in -mvreg-. The only difference is that -mvreg- cannot compute heteroskedasticity robust standard errors.

In practical terms assume the following multiple-equation regression:

mvreg portfolio1 portfolio2 portfolio3 = rmrf smb hml mom

Now, instead of ordinary standard errors I want to compute heteroskedasticity robust standard errors for each of the three regressions
portfolio1 = rmrf smb hml mom
portfolio2 = rmrf smb hml mom
portfolio3 = rmrf smb hml mom

Hope that clarifies my question.

"Nick Cox" <n.j.cox@durham.ac.uk>

> Two short answers: 
> 
> 1. In general, hidden options are rare in commands like -mvreg-. If an
> option isn't documented, it usually doesn't exist. 
> 
> 2. What would that look like, theoretically or practically, given that
> -mvreg- is specifically for several dependent variables? 

Peter Velte
 
> is there a way to perform mvreg with Newey-West-heteroskedasticity-robust
> standard errors?

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