I would love to see the itemisation and deduction for this. In particular, how did you decide how much value was due to the publisher, movie studios, etc. vs. her?
We can safely assume that she would have produced absolutely no value, had there been no publisher.
Maybe the publisher produced $1B of value and JK Rowling produced none? They did after all select her over other authors.
> Maybe the publisher produced $1B of value and JK Rowling produced none?
You are actually right that publisher produced most of the value... though only in the beginning when she was a nobody. I am sure publishing industry knows that too and read somewhere that their deals with new authors reflect that reality.
After the first 3 books when the series started gaining traction and people talked about lining up for the 4th one? It was absolutely the author who was producing the value. Publishing house couldn't have conjured up the remaining 4 books at the same quality - they are good at publishing, not good at creating. (Just ask HBO / Game of Thrones showrunners how it went after GRRM didn't write the last 2 books).
We can safely assume that she would have produced absolutely no value, had there been no publisher.
Maybe the publisher produced $1B of value and JK Rowling produced none? They did after all select her over other authors.