Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
re: st: ATT greater than one
From
"Ariel Linden" <[email protected]>
To
<[email protected]>
Subject
re: st: ATT greater than one
Date
Sun, 16 Mar 2014 10:36:04 -0400
You haven't provided us with sufficient information to respond to your
question. Why would you think that ATT should be interpreted as percentage
points??? It all depends on what your variables are and what it is you're
estimating. If you were estimating medical costs as an outcome, then these
results may be very reasonable (since medical costs typically follow a
Poisson-like distribution).
Date: Sat, 15 Mar 2014 19:34:24 +0000
From: Isobel Williams <[email protected]>
Subject: st: ATT greater than one
Dear Statalist,
I'm using psmatch2 (user-written software) to find the ATT of a welfare
programme. In some of my results, the ATT is coming up in extremely high
numbers. The standard errors are also really high.
Does this mean that I've done something wrong? How would I interpret this?
I know that ATT should be interpreted as percentage points, i.e. an ATT of
0.67 would mean an increase of 6.7 percentage points, but what about an ATT
of 1482.47, with a standard error of 1497.69?
Many thanks,
Isobel Williams
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/