Ok, let's take a generic book, we'll say it costs $15 new hardcover.
Some of the costs are the same - advertising, production + editing, etc. Every copy sold contributes back to paying for this (and other books that don't fare as well.) These represent the bulk share of the costs of PRODUCING the book.
As an author, and tech editor on a couple technical books, I can tell you that as an editor, I got paid a fee per page reviewed. As an author I get VERY little per copy sold, but I was advanced a couple $K each time (which comes out of your royalties until the book sells enough to cover the advance.) In between, the Senior editor of the book had to coordinate between the two groups, make sure that the author was following the style and layout requirements, coordinate with the printers, the financials group, the marketing group, etc. All that costs money.
Some cost are different - yes, while they don't have to pay for the physical printing, binding, and distribution, they DO have to consider apple's cut, they DO have to process the electronic copy to convert it into the correct format and (Hopefully) perform some checking to ensure conversion quality. If any additional features (multimedia) are added, that's even more cost.
So, I'd say that 80-90% of the costs are identical between printed and electronic versions, and of the remaining amount, the costs offset each other.
What do I think a fair price for electronic version of that hypothetical $15 hardcover should be? $13 minimum... Probably more like $13.99.
Some of the costs are the same - advertising, production + editing, etc. Every copy sold contributes back to paying for this (and other books that don't fare as well.) These represent the bulk share of the costs of PRODUCING the book.
As an author, and tech editor on a couple technical books, I can tell you that as an editor, I got paid a fee per page reviewed. As an author I get VERY little per copy sold, but I was advanced a couple $K each time (which comes out of your royalties until the book sells enough to cover the advance.) In between, the Senior editor of the book had to coordinate between the two groups, make sure that the author was following the style and layout requirements, coordinate with the printers, the financials group, the marketing group, etc. All that costs money.
Some cost are different - yes, while they don't have to pay for the physical printing, binding, and distribution, they DO have to consider apple's cut, they DO have to process the electronic copy to convert it into the correct format and (Hopefully) perform some checking to ensure conversion quality. If any additional features (multimedia) are added, that's even more cost.
So, I'd say that 80-90% of the costs are identical between printed and electronic versions, and of the remaining amount, the costs offset each other.
What do I think a fair price for electronic version of that hypothetical $15 hardcover should be? $13 minimum... Probably more like $13.99.