The stata.com website and other websites of StataCorp LLC are intended for Stata customers and others interested in statistics. We appreciate receiving comments about our sites; email us.
© Copyright 1996–2020 StataCorp LLC
Copyright 1996–2020 StataCorp LLC, 4905 Lakeway Drive, College Station, TX 77845 USA. Permission to use, copy, and distribute documents delivered from this World Wide Web server is hereby granted, provided
All other rights are reserved.
The name StataCorp or the Stata logo may not be used in advertising or publicity pertaining to distribution of this information without specific, prior written permission.
The products and offerings described in these documents may be subject to Intellectual Property rights reserved by StataCorp and are not licensed hereunder.
Note that the pictures, icons, and logos encoded in gif files and other formats are either copyrights and/or trademarks of StataCorp LLC or others from whom StataCorp has received permission to incorporate into this site. In the context of this site, they are covered by the above Copyright notice. However, the pictures, icons, and logos may not be individually extracted and used in other websites without the written permission of StataCorp or the respective copyright or trademark holder.
If you believe that your work or the work of others has been copied in a way that constitutes copyright infringement, please provide StataCorp's Copyright Agent (Director of Operations) the following information required by the Online Copyright Infringement Liability Limitation Act of the Digital Millennium Copyright Act, 17 U.S.C. 512:
For copyright inquiries under the Digital Millennium Copyright Act please contact:
Director of Operations
4905 Lakeway Drive
College Station, Texas 77845
For web posting, reprint, transcript or licensing requests for StataCorp material, please contact us.
Stata, , Stata Press, Mata, , and NetCourse are registered trademarks of StataCorp LLC.
Stata and Stata Press are registered trademarks with the World Intellectual Property Organization of the United Nations.
NetCourseNow is a trademark of StataCorp LLC.
Other brand and product names are registered trademarks or trademarks of their respective companies.
“StataCorp” refers to the legal entity StataCorp LLC.
“Site” refers to www.stata.com and blog.stata.com. The Site is owned and operated by StataCorp.
“Content” refers to any images, text, data, or other information.
“Submissions” refer to any images, text, data, or other information submitted by third parties, including you, in any comment area or forum provided by the Site. Submissions include, but are not limited to, creative suggestions, ideas, notes, concepts, information or other materials.
“Agreement” refers to the Agreement set forth herein, which lays out the terms and conditions for your use of the Site. This Agreement is a binding contract between StataCorp and you as user of the Site. By your acceptance of this agreement , and as a material condition of such use, you warrant that you are over the age of eighteen and that you have provided accurate and complete information in any communication with StataCorp.
Access to the Site is provided free of charge and does not create a professional services relationship or any other relationship with StataCorp.
StataCorp reserves the right to terminate access to the Site for any reason, and StataCorp reserves the right to take any other actions StataCorp believes are in its interest or the interest of its customers and users. By using this Site, you signify your assent to these Terms. If you do not agree with any part of these Terms, you must not use this Site.
You may not develop or derive for commercial sale or use any data in machine-readable or other form that incorporates or uses any substantial part of the Site.
You warrant that you have the right to utilize, to license, and to sublicense any Content that you submit to the Site, including profile information, comments, and email. You grant to StataCorp a non-exclusive, worldwide, fully paid, and royalty-free perpetual license to use, display, distribute, perform, reproduce in whole or in part, and modify and create derivative works in any media from such Content.
Community Guidelines & Acceptable Use Policy
You are solely responsible for any and all acts and omissions that occur during or relating to your use of the Site, and you agree not to engage in unacceptable use of the Site, which includes, without limitation, use of the Site to:
You understand that by using the Site, you may be exposed to Content that may offend you or challenge your beliefs. Your remedy is to avoid such Content by discontinuing your access.
Third-party Content and Non-Endorsement
Opinions and other statements expressed by users and third parties are theirs alone, not opinions of StataCorp. Content created by third parties is the sole responsibility of the third parties and its accuracy and completeness are not endorsed or guaranteed. The Site and third parties may provide links to web pages, websites, and various resources or locations on the web. StataCorp has no control over the information you access via such links, does not endorse that information, and shall not be responsible for it or for the consequences of your use of that information.
StataCorp does not initiate, edit, modify, select, or designate specific recipients for any Submissions except that (i) StataCorp may consolidate and edit for clarity any Submission, (ii) StataCorp may inform registered users or third parties of particular Submissions, in whole or in part, and (iii) StataCorp reserves the right to monitor the Site and to remove Submissions, in whole or in part, that StataCorp, in its sole discretion, considers to be inappropriate or unlawful. The exercise of such rights shall not create an obligation for StataCorp to monitor, screen or edit Content on the Site in any way.
Please note that, because StataCorp and its designees may host message boards, commenting opportunities, reviews and feedback areas, and other forums found on the Site (collectively, the "Forums and Comment Areas") and, therefore redistribute materials you give to us, StataCorp requires certain rights to those materials. Accordingly, by posting, sending, or transmitting to StataCorp Submissions, you grant StataCorp and its designees a worldwide, non-exclusive, sublicenseable (through multiple tiers), assignable, royalty-free, perpetual, irrevocable right to use, reproduce, distribute (through multiple tiers), create derivative works of, publicly perform, publicly display, digitally perform, make, have made, sell, offer for sale and import such Submissions in any media now known or hereafter developed for any purpose whatsoever, commercial or otherwise, without compensation to the provider of the Submissions. None of the Submissions will be subject to any obligation, whether of confidentiality, attribution or otherwise, on the part of StataCorp and StataCorp will not be liable for any use or disclosure of any Submissions.
This Site may contain links to other websites which are provided solely as a convenience to you and not as an endorsement by Stata of the contents of such other websites. Stata shall not be responsible for the content of any other websites and makes no representation or warranty regarding any other websites or the contents or materials on such websites. If you decide to access other websites, you do so at your own risk.
Forum and Comment Areas
The Forums and Comment Areas are designed to permit you to share your ideas and opinions. Information on the Forums and Comment Areas is provided by our staff and other contributors, some of whom use anonymous screen names and are people not otherwise connected with us. You acknowledge that a large volume of information is available in our Forums and Comment Areas and that people participating in such Forums and Comment Areas occasionally post messages or make statements, whether intentionally or unintentionally, that are inaccurate, misleading or deceptive. StataCorp neither endorses nor is responsible for such messages or statements, or for any opinion, advice, information or other utterance made or displayed on the Site or Forums and Comment Areas by third parties. The opinions expressed in the Forums and Comment Areas reflect solely the opinion(s) of the participants and may not reflect the opinion(s) of StataCorp. StataCorp is not responsible for any errors or omissions in postings in the Forum s and Comment Areas, for hyperlinks embedded in messages or for any results obtained from the use of such information. Under no circumstances will StataCorp or its affiliates be liable for any loss or damage caused by your reliance on such information obtained through the Sites or the Forums and Comment Areas. StataCorp has no obligation to monitor the Forums and Comment Areas, or any Submissions or other materials that you or other third parties transmit or post on the Forums and Comment Areas. You acknowledge and agree that StataCorp has the right (but not the obligation) to monitor the Forums and Comment Areas and the materials you transmit or post; to alter or remove any such materials (including, without limitation, any posting to a Forum or Comment Area); to disclose such materials and the circumstance surrounding their transmission to any third party in order to operate the Site properly; to protect StataCorp itself and its visitors; and to comply with legal obligations or governmental requests.
Limitation and Liability of Use
StataCorp has worked to ensure the accuracy of the information it provides through its products and services, including through the Site. This information frequently relies on data obtained from many sources, however, and StataCorp cannot guarantee the accuracy of the information provided or any analysis based thereon.
YOU EXPRESSLY AGREE THAT THE USE OF THE SITE IS AT YOUR SOLE RISK. SUCH PRODUCTS AND SERVICES ARE PROVIDED ON AN “AS IS” BASIS AND STATACORP MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, AND DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. STATACORP DISCLAIMS ANY WARRANTY THAT THE SERVICE WILL BE UNINTERRUPTED, SECURE OR ERROR FREE. NO ADVICE, OPINION OR OTHER INFORMATION OBTAINED THROUGH THE SITE OR FROM STATACORP, ORALLY OR IN ANY MEDIA, SHALL CREATE ANY WARRANTY FROM STATACORP NOT EXPRESSLY STATED IN THIS AGREEMENT.
STATACORP SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, SPECIAL, EXEMPLARY, PUNITIVE OR OTHER DAMAGES, INCLUDING LOST PROFITS OR COSTS OR ATTORNEYS' FEES, UNDER ANY LEGAL THEORY INCLUDING BUT NOT LIMITED TO BREACH OF CONTRACT, BREACH OF WARRANTY, NEGLIGENCE, OR STRICT LIABILITY, REGARDLESS OF WHETHER STATACORP WAS INFORMED OF THE POSSIBILITY OF SUCH DAMAGES.
You agree to indemnify, defend, and hold StataCorp, its affiliates, licensors, suppliers, advertisers and sponsors, and its and their directors, officers, employees, consultants, agents and other representatives, harmless from and against any and all claims, damages, losses, costs (including reasonable attorneys' fees) and other expenses that arise directly or indirectly out of or from (a) your breach of this agreement, including any violation of the Terms of Service; (b) any allegation that any Content or other materials you submit to us or transmit to the Site infringe or otherwise violate the copyright, trademark, trade secret or other intellectual property or other rights of any third party; and/or (c) your activities in connection with the Site.
Special Agreement on Fee-Shifting and Choice of Law
If you attempt to bring any legal action against StataCorp based in any way on its products or services, including the Site, you agree that, in the event you do not prevail or StataCorp does prevail you will reimburse StataCorp for any costs and attorneys fees associated with their defense of the action. The use of the Site and any claim or dispute relating to the Site shall be governed by the laws of Texas, without regard to its conflicts of law principles. Exclusive venue for any claim shall be in the state and federal courts located in Texas. If use of the Site is unauthorized in any jurisdiction, it does not affect the provisions of these Terms of Service, including without limitation this paragraph.
If any provision or portion of these Terms of Service is held in whole or in part to be unenforceable for any reason, the remainder of that provision and of the entire agreement will be severable and will remain in effect, to the fullest degree consistent with the intent of this Agreement.
THIS PUBLICATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
This document could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein. StataCorp may make improvements and/or changes in the products and programs described in this document at any time.