Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: -gammafit-, -pgamma-, -qgamma- packages revised on SSC


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: -gammafit-, -pgamma-, -qgamma- packages revised on SSC
Date   Wed, 18 May 2011 00:04:33 +0100

Thanks to Kit Baum as usual, these three packages have been revised on SSC.

The main change is to support an alternative parameterisation of the
gamma distribution directly.

In Stata 11, -gmm- has a worked example of fitting a two-parameter
gamma distribution directly using fake data from Greene's well-known
econometrics textbook. This example uses what these packages now
support via an -alternative- option.

Greene's text is described in http://www.stata.com/bookstore/ea.html

Various other small updates have been made to the help.

If interested, please install or update using -ssc- or -adoupdate-.

Nick

GAMMAFIT
 module to fit a two-parameter gamma distribution
 Authors: Nicholas J. Cox  Stephen P. Jenkins       Req: Stata version
8.0 (4.0 for gamma4)
 Revised: 2011-05-17

QGAMMA
 module to generate quantile-quantile plot for data vs fitted gamma distribution
 Authors: Nicholas J. Cox       Req: Stata version 8.0 (4.0 for pgamma4)
 Revised: 2011-05-17

PGAMMA
 module to generate probability plot for data vs fitted gamma distribution
 Authors: Nicholas J. Cox       Req: Stata version 8.0 (4.0 for pgamma4)
 Revised: 2011-05-17
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index