If I understand it correctly, you&#x27;re saying that The Economist based an article on your research, and you&#x27;re spurned, because they didn&#x27;t give you a byline or even a hat-tip. That&#x27;s not plagiarism. Plagiarism would be if they copied and perhaps edited paragraphs of your writing; they didn&#x27;t do that, they used the data, and seriously reworked the presentation. If you had an agreement, perhaps in e-mail, that you&#x27;d receive credit, that&#x27;s breach of contract.<p>Their articles are usually well researched, and it is likely that you were not the only source. I&#x27;m sorry that you feel like you&#x27;ve been tricked, but you shouldn&#x27;t do hours and hours of volunteer work for a newspaper (or any company) without first establishing what you&#x27;ll be getting out of it, preferably in writing. The journalist therefore probably didn&#x27;t realize you felt strongly about it, and when you asked them subsequently, maybe took an offence?