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 on April 23, and its replacement, is already up and running.

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

st: How to drop observations in panel

From   Islam Abdeljawad <>
To   "" <>
Subject   st: How to drop observations in panel
Date   Fri, 5 Aug 2011 22:36:22 -0700 (PDT)

Hi, there
I am new to stata. I am working on an unbalanced data set where firm is the cross section identifier
 and the time identifier is year. 
Estimation of the model will be based
 on GMM-sys. some of my firms have only one or two years of observations. 
Should I drop these firms and how I can do it in stata. in other words, any firm
 that have less than three years of data 
available (less than three observations) will not be included in the estimation.
In the moment i can't figure it out by myself.
Hopefully someone can help me.

Islam Jawad
*   For searches and help try:

© Copyright 1996–2016 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index