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: OLS and IV have opposite sign


From   Shikha Sinha <shikha.sinha414@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: OLS and IV have opposite sign
Date   Mon, 15 Oct 2012 12:58:09 -0700

Dear all,

I am estimating an Ordinary least square (OLS) and Instrument variable
(IV) model, however the signs are opposite to each other. The OLS
coeff is negative, while the IV coeff is positive. Could anyone
explain what the signs in these two models are different- is there any
econometric reason for this?

Thanks,
Shikha
*
*   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/


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