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st: Programs for text processing: a chronology
In re various claims about user-written text processing programs for
use with Stata, I would like to present the following facts, in
(1) -outreg-, by John Luke Gallup, was written for version 6 of Stata.
It was first hosted on the SSC Archive, which I maintain, on 10 Apr
1999. (RePEc templates, unlike package descriptions, contain both
creation dates and revision dates). -outreg- was presented in Stata
Technical Bulletin 46 (Nov 1998), with revisions in STB 49 (May 1999),
STB 58 (Nov 2000) and STB 59 (Jan 2001). The latest version available
from SSC is 3.1.8, revised as of 3 May 2008. Given that, I believe
that John Gallup would disagree with the statement that appears in -
findit outreg- listings for the STB that "The original outreg command
is no longer maintained. It has been replaced by outreg2."
-outreg-, being written for Stata 6.0, relies on retrieving
information from the ereturn list directly after an estimation command
(2) The -estimates- suite of commands was added to Stata in version 8
of 2003, permitting a user program to access several sets of estimates
from earlier estimation commands.
(3) -estout-, by Ben Jann, was written for version 8.0 of Stata (it
now requires Stata 8.2). It was first hosted on the SSC Archive on 22
July 2004. It was subsequently described in Stata Journal 5:3 (Q3
2005) and SJ 7:2 (Q2 2007).
-estout- is based on the technology introduced in Stata 8.0: the
stored -estimates-. One must use -estimates store- or its own
convenience command -eststo- to place stored results where they can be
accessed by -estout-. Thus, although the end result is similar to that
of -outreg-, the logic is quite different, as -estout- is only invoked
after all estimation commands to be tabulated in one table have been
executed and their results stored.
(4) -outreg2-, by Roy Wada, was written for version 7 of Stata, and
first hosted on the SSC Archive on 19 October 2005. It has not been
documented in the STB or SJ. It is documented as being based to some
degree on an uncirculated version 4.0 of -outreg- provided to me by
John Gallup. As -outreg2- was written for Stata 7, which did not
support stored -estimates-, it originally relied on the same
technology as -outreg-: retrieval of results from the ereturn list
following an estimation command. It has since been enhanced to work
with stored -estimates-, introduced in Stata version 8. -outreg2-
provides additional functionality to users of Stata 8.0, 8.2, and
11.0, as described in its help file.
Although this chronology does not (and is not meant to) decisively
confirm or reject any claims of offenses against intellectual property
rights, I think it is useful to note the order in which these highly
popular alternative packages for text processing in Stata were
originally developed and made available to the Stata user community.
maintainer, SSC Archive
Research Papers in Economics (RePEc)
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