Terms, refunds and privacy

Short, because this site does very little. What it does is set out below in full.

Who sells this book

Dodo Payments is the merchant of record. When you buy, your contract is with Dodo Payments, not with this website. Dodo is the seller, its identity and address appear at checkout and on your invoice, and it carries the sales-tax registration in every jurisdiction it operates in.

That arrangement is why the checkout is not on this domain. This site publishes the book and hands you to Dodo to buy it.

The publisher is Grade One, an imprint. Reach it at [email protected] — the same address as the corrections route, and a real person reads it.

What your purchase includes

What your copy includes. Every correction to this edition, for as long as corrections are made.

If a figure in this book turns out to be wrong, being told so is part of what you already paid for, and it is not a separate product.

The line: anything that makes the book more accurate is included. Anything that makes it bigger is a new edition. A source revising its figure, a newer year of the same table, a chapter rewritten because it was wrong — all yours. New countries and new careers are a new book.

There is no schedule attached to any of that, deliberately. A correction ships when it is found, not on a calendar.

You receive the EPUB, the PDF and the full dataset. Both formats are one purchase; you did not buy a format.

Refunds and the right to cancel

Refunds are handled by Dodo Payments, because Dodo is the seller. Its Buyer Terms govern the sale and set out how to ask.

If you are a consumer in the European Union or the United Kingdom, note what happens at checkout: buying downloadable content and consenting to receive it immediately ends the statutory cancellation period for that content, and Dodo’s Buyer Terms record that consent. This is the ordinary rule for digital downloads, not a term invented here.

Separately from any of that: if the book is not what you expected, write and say so. The address is above.

What this website collects

Nothing.

There is no signup form, no account, no comment box, no newsletter and no shopping cart on this site. There are no analytics cookies and no tracking scripts. Nothing on any page is fetched from another company’s server — no hosted fonts, no embedded video, no third-party widgets — so no other company learns that you visited.

That is also why there is no cookie banner. There is nothing to consent to.

Two consequences worth stating plainly:

• If you buy the book, Dodo Payments collects your email address in order to sell it to you and to deliver it. Dodo’s privacy policy governs that. Corrections to the book are sent to that address, because that promise cannot be kept otherwise.
• If you write to us, we have your email, because that is what email is. It is used to answer you and for nothing else. It is not added to a list, not sold and not shared. Ask and it is deleted.

Our host, Cloudflare, processes server logs to deliver the site and defend it from attack, as any host must.

Copyright and licence

Two different things, deliberately.

The book — the EPUB and the PDF — is © 2026 Grade One. All rights reserved. It is yours to read, on as many of your own devices as you like. It is not yours to redistribute.

The data — the source bibliography and the gap register — is published under the Creative Commons Attribution 4.0 International licence. Copy it, republish it, adapt it, build on it, sell something built on it. The only condition is credit. Details and downloads.

A book arguing that evidence should be checkable is a strange place to put the evidence behind a permissions process, which is the whole reason for the split.

Third-party material inside the data is credited where it comes from. O*NET, published by the United States Department of Labor, and ESCO, published by the European Commission, are used under CC BY 4.0. Neither body has reviewed or endorsed this book.

Accuracy

Every figure in the book carries a source, a date and a reliability grade, and everything the book could not source is listed rather than estimated.

That is a description of method, not a warranty of outcome. This is a reference work about labour markets, not personal financial, legal or career advice, and no decision you make from it is guaranteed by anyone. Figures age; that is why each one is dated.

Changes to this page

Material changes are recorded in the book’s revision log and dated here.

Last updated August 2026.