st: carryforward

[David Kantor <dkantor@jhu.edu>]

Hi everyone.

Sometime last year, I created a program, carryforward, which fills in 
missing values by carrying forward nonmissing values that precede them.

This has recently been revised and updated into SSC.  The revision is that 
it allows -if- and -in- qualifiers, and has an improved help file.

Anyone who has obtained this previously may want to now get the updated 
version.

Thanks to Kit Baum for his part in placing this into SSC.

-- David K.

David Kantor
Institute for Policy Studies
Johns Hopkins University
dkantor@jhu.edu
410-516-5404
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