Just as Wikipedia has difficulty reporting biographies accurately, it has difficulty reporting accurately on supply-side economics and other subject matter. So do economics professors in the class room. Financial journalists also have no idea what they call “Reaganomics” is.
If you click the link below, you can read my brief, clear explanation of supply-side economics published in the peer-reviewed Independent Review (Winter 2020). I mistakenly reported James Galbraith to be the staff director of the Joint Economic Committee a couple of years before he was, but this detail is immaterial to the content.