Originally Posted by Jellby
So, a work published one year after the author's death would be public domain 50 years afterwards, even though the author died less than 70 years before?
For works published posthumously before
1989, where the author had been dead for 50 years or more at the time of publication, then yes, that is the case.
As Sparrow has already posted, this diagram:
very neatly summarises the current situation.