How Closed Trade Deals Ratchet Up the Copyright Term Worldwide

[Jeremy Malcolm] ... differences in copyright term make things more complicated for copyright holders, there are constant efforts by some copyright holders to try to homogenize the duration of copyright so that they can more easily enforce their copyrights worldwide—and of course, they would like them to be harmonized at the life-plus-70 year term, so that they can extract another 20 years of monopoly rents, over and above the Berne Convention's standard life-plus-50 year term. Trade agreements are one way that they are trying to achieve this.