Self-Published Authors should charge $2.99 to $9.99 for their e-books
Interesting but this conclusion appears to be based on opinion (which I agree with) but there’s no hard data presented. The pricing model is also oriented towards short to mid-length novels rather than all types of e-books.
Still, I think consumers expect a discount for purchasing an e-book. And a lower price point may encourage more people to buy on a whim.