Nick Cox <

[hidden email]> recommended

> If you read -help predict- you will see that it explains that

-predict- also takes -if- if you wish.

> As you did not specify -if-, predictions were generated for the whole

dataset, which people sometimes do want.

> So, just repeat -if isin2 == 1- on the -predict-.

True, but more generally, after any model fit you can use the saved flag

on the estimation commands:

predict ... if e(sample)

Another corollary of the -if- notation is you can predict from one model

into more than one variable, making it easier to graph fitted values and

extrapolations with different line styles.

Allan

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