Joseph Wagner<[email protected]> wrote:
This is identical to finding the nearest hospital to patients, except
you don't have to calculate distance between pairs of lat/lon
coordinates, since the distance is measured in days. See e.g.
http://www.stata.com/statalist/archive/2007-01/msg00098.html
and recent threads referencing this trick, e.g.
http://www.stata.com/statalist/archive/2009-07/msg00083.html
On Tue, Sep 8, 2009 at 12:15 PM, Joseph Wagner<[email protected]> wrote:
> I am using Stata ver 8.2 and wish to merge two files each with an idcode
> and a date. (I know that more recent versions of Stata can handle this
> more capably but funds are short at this time so I make do with what I
> have.) None of the dates in using matches exactly with master. I get
> the following:
>
> . tab _merge
>
> _merge | Freq. Percent Cum.
> ------------+-----------------------------------
> 1 | 585 1.82 1.82
> 2 | 31,554 98.18 100.00
> ------------+-----------------------------------
> Total | 32,139 100.00
>
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