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# RE: st: return of p-value for beta after regress command

 From Richard Williams To statalist@hsphsun2.harvard.edu Subject RE: st: return of p-value for beta after regress command Date Sun, 01 Jan 2006 17:34:43 -0500

```At 05:20 PM 1/1/2006, Maarten buis wrote:
```
```Hi Colin,

Something like this was discussed a while ago on statalist:
http://www.stata.com/statalist/archive/2005-02/msg00481.html

HTH,
Maarten
```
Based on that message, this is an improvement on what I sent before:

* Run the regression first, then run this
mat b = e(b)
mat v = e(V)
local k = colsof(b)
mat t = J(1, `k', 0)
mat p = J(1, `k', 0)
local dfr = e(df_r)

forval j = 1/`k' {
local t = b[1,`j'] / sqrt( v[`j', `j'] )
local p = 2*ttail(`dfr',abs(`t'))
mat t[1,`j'] = `t'
mat p[1,`j'] = `p'
}
mat list t
mat list p

The main advantage of this is that the results are stored in matrices if you want them.

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Richard Williams, Notre Dame Dept of Sociology
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