Re: st: spline regression

[David Airey <david.airey@vanderbilt.edu>]

.

I don't see where yhat1 and yhat2 are created in your example here.

-Dave

> *--------------------- begin example ------------------------
> sysuse nlsw88, clear
> gen ln_w = ln(wage)
> gen black = race == 2 if race < .
>
> mkspline  ten1 10 ten2 = tenure
> reg ln_w ten1 ten2 union age black collgrad
>
> mkspline tens=tenure, cubic nk(3)
> reg ln_w tens* union age black collgrad
>
> preserve
> sum age if e(sample)
> replace age = r(mean)
> replace union = 1
> replace black = 0
> replace collgrad = 1
> predict yhat
>
> bys tenure: gen byte mark = _n== 1
> twoway line yhat1 yhat2 tenure if mark, sort
> restore
> *-------------------- end example -----------------------------
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