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: XTFRONTIER: How to interpret Total Efficiency Measures


From   Victor Waters <vvwaters@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: XTFRONTIER: How to interpret Total Efficiency Measures
Date   Mon, 5 Apr 2010 12:09:04 -0400

Dear StataListers,

I am a little confused about the magnitude of the total efficiency
measure. My XTFRONTIER with time varying decay model,
runs well, almost all of the coefficients are as expected.,

My total efficiency measures (for all units) are very low - between .1
and .25. What importance should I attach to this?
Does it mean all of the units are very inefficient? Can it only be
interpreted as the order of efficiency among the units?

For exactly the same specification if I run time invariant model, the
efficiency measures a lot more reasonable: in the range
.4 to .8. Are these two sets of measures comparable? I understand that
if eta = 0, both ti and tvd option results are the same.
If eta is not 0, can I compare ti and tvd efficiency measures?

I looked at all the sources I have for answers to the above questions,
but could not get answers.

I appreciate pointing me to the right direction.

Best regards,

Victor
*
*   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