Stata Quick Reference and Index
Stata Quick Reference and Index
Stata Quick Reference and Index
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Copyright c○ 1985–2009 by <strong>Stata</strong>Corp LP<br />
All rights reserved<br />
Version 11<br />
Published by <strong>Stata</strong> Press, 4905 Lakeway Drive, College Station, Texas 77845<br />
Typeset in TEX<br />
Printed in the United States of America<br />
10 9 8 7 6 5 4 3 2 1<br />
ISBN-10: 1-59718-055-6<br />
ISBN-13: 978-1-59718-055-9<br />
This manual is protected by copyright. All rights are reserved. No part of this manual may be reproduced, stored<br />
in a retrieval system, or transcribed, in any form or by any means—electronic, mechanical, photocopy, recording, or<br />
otherwise—without the prior written permission of <strong>Stata</strong>Corp LP unless permitted by the license granted to you by<br />
<strong>Stata</strong>Corp LP to use the software <strong>and</strong> documentation. No license, express or implied, by estoppel or otherwise, to any<br />
intellectual property rights is granted by this document.<br />
<strong>Stata</strong>Corp provides this manual “as is” without warranty of any kind, either expressed or implied, including, but<br />
not limited to, the implied warranties of merchantability <strong>and</strong> fitness for a particular purpose. <strong>Stata</strong>Corp may make<br />
improvements <strong>and</strong>/or changes in the product(s) <strong>and</strong> the program(s) described in this manual at any time <strong>and</strong> without<br />
notice.<br />
The software described in this manual is furnished under a license agreement or nondisclosure agreement. The software<br />
may be copied only in accordance with the terms of the agreement. It is against the law to copy the software onto<br />
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The automobile dataset appearing on the accompanying media is Copyright c○ 1979 by Consumers Union of U.S.,<br />
Inc., Yonkers, NY 10703-1057 <strong>and</strong> is reproduced by permission from CONSUMER REPORTS, April 1979.<br />
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For copyright information about the software, type help copyright within <strong>Stata</strong>.<br />
The suggested citation for this software is<br />
<strong>Stata</strong>Corp. 2009. <strong>Stata</strong>: Release 11. Statistical Software. College Station, TX: <strong>Stata</strong>Corp LP.