psgraph

[Nana Owusu]

I'm using the psgraph command to generate a propensity score histogram with the binary treatment variable and the pscore varaiable. The command is thus; "psgraph, NHIS mypscore". However, the results I get is; "unknown egen function sum()"

[Nick Cox]

psgraph is part of the psmatch2 package from SSC, as you are asked to explain (FAQ Advice #12).

The sum() function of egen is not documented but has been distributed with every Stata since a very early version.

Problems with accessing egen functions have been reported several times by users using pirated versions of Stata. I don't have other suggestions.

[Nana Owusu]

Thanks very much.

[Nick Cox]

What you can try is see whether any egen code is on your system, so show the results of

which egen
which _gmean
which _gsum

[Nana Owusu]

Hi Nick,
I typed the which egen command and this is the result I got;
. which egen
C:\Users\ACCOUNTS\AppData\Local\Temp\Rar$EXa7456.8 611\StataCorp Stata MP 16.0 Rev 2019-07-24 x64\ado\base\e\egen.ado*! version 3.4.1
05jun2013

[Nick Cox]

Your copy of Stata is not properly installed. A search of this forum will find several similar replies.