Permissions and copyright for Materials at


Materials at—articles/papers, visualisations (charts and graphics created by me, usually with a grey footer showing the link citation), quotes, and papers—are available for use at no charge.

You may link, distribute, and reproduce any of these Materials. If you reproduce articles/papers in their entirety, please change nothing; not one comma, not one period. If you quote from them or if you refer to them, please provide proper citation in the format:

Dr Alan D. Thompson, (Month name/Year of creation).
e.g. Dr Alan D. Thompson, (Jan/2023).

You may link to the homepage at:

Visualisations (charts and graphics created by me, usually with a grey footer showing the link citation) do not need additional citation, as it is built in.

Please feel free to share these Materials as you see fit; the Materials at are for all humanity.

No contact

Unless it is an exceptional circumstance, you do not need to directly ask my permission to use these Materials. You can simply go ahead and use them. In particular, media outlets can pick up quotes from without asking permission.


The website design is copyrighted, including the CSS code and the look and feel of the site, so don’t copy the design of the site itself. Don’t create a site that might be confused with

Larger works that include a copyright notice shall remain copyrighted.

All courses are copyrighted, including paid and free courses.

All opt-in content, including The Memo, is copyrighted. This includes all PDFs found on the site, though you may still quote from these.

My books are copyrighted.

Moral rights

I am retaining the moral rights to my work. Moral rights include the right to attribution and the right to preserve the integrity of the work.

Alan D. Thompson
Phoenix, USA
January, 2023

Photo: Harvard Prof Yesha Y. Sivan presents model sizes at a conference sponsored by Accenture. Visualization source: Dr Alan D. Thompson, (Dec/2022)