Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

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

st: xtunitroot ips error for 'no observations' and trend

From   wangpan110 <>
Subject   st: xtunitroot ips error for 'no observations' and trend
Date   Fri, 17 Sep 2010 17:08:22 -0700 (PDT)

Hi, i am new to STATA and running an unbalanced panel. i am wondering ask two

1) when i use -xtunitroot ips- to examine the variable's stationarity, some
variables display 'no obserevations, e (2000)', i have tried -xtunitroot
fisher- and the same problem comes again, what can i do? it seems not beause
of lots of missing values in each panel.

2) what is exacatelly meaning of -trend- commonand following up -xtunitroot
ips-? becuase the P-value are substainally different between with -trend-
and without -trend-. 

any help is appreciated.

View this message in context:
Sent from the Statalist mailing list archive at
*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index