AAMD Opposes Artists’ Royalties in Statement to Copyright Office
The Association of Art Museum Directors opposes granting artists resale royalty rights.
The AAMD is concerned that the royalty, contrary to its intended purpose, may actually undermine the economic position of many living artists, especially artists at the start of their careers. As a matter of economics, if a buyer knows that he or she has to pay a share of any profits from later sales, then the buyer is likely to pay less in the initial transaction.
You can read their letter, here: Association_of_Art_Museum_Directors.