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: RE: sample size reduced significantly
From
"Yu Chen, PhD" <[email protected]>
To
[email protected]
Subject
Re: st: RE: sample size reduced significantly
Date
Fri, 12 Apr 2013 11:17:41 -0500
Thank you, Arya.
On Thu, Apr 11, 2013 at 3:22 PM, Arya Eskamani
<[email protected]> wrote:
> In your explanatory variables, do you have any rows that with a missing field? When you run an OLS it only runs on observations for which all data is available.
>
> Try seeing if you do by using -codebook [varname]- , it will tell you if it holds any missing values. Hope this helps :)
>
> Arya Eskamani, M.S.
> Project Manager
> 4700 Millenia Blvd | Ste 500 | Orlando, FL 32839
> 407.367.2880 Phone | 877.313.4412 eFax
> www.assist-rx.com | [email protected]
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of Yu Chen, PhD
> Sent: Thursday, April 11, 2013 4:17 PM
> To: [email protected]
> Subject: st: sample size reduced significantly
>
> Dear Statalist,
> I have several variables with each of them having at least 6000 observations (non-missing values). However, when I put them into OLS regression, the number of observations reduced to only about 1000. I cannot figure out what causes the problem. Could you please help me find out the causes? What code can I use to analyze the problem?
> Thank you in advance.
>
> Yu Chen
> *
> * 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/
>
> *
> * 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/
--
Yu Chen, Ph.D.
Assistant Professor of Accounting
A. R. Sanchez, Jr. School of Business, WHTC 218D
Texas A&M International University
5201 University Boulevard
Laredo, Texas 78041-1900
USA
956-326-2513 (office)
956-326-2479 (fax)
*
* 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/