Impairment of RNA editing at a handful of coding sites causes severe disorders, prompting the view that coding RNA editing is highly advantageous. Recent genomic studies have expanded the list of human coding RNA editing sites by more than 100 times, raising the question of how common advantageous RNA editing is. Analyzing 1,783 human coding A-to-G editing sites, we show that both the frequency...

Bolt and Tieman (2008) suggested that profit function non-concavities may account for the prevalence of skewed pricing by two-sided platform businesses. In the Rochet-Tirole (2003) model, however non-concavity is not necessary for highly skewed pricing. Ubiquitous high pass-through rates are sufficient but implausible. In the Armstrong (2006) model, non-concavity is neither necessary nor suffic...