1. Do agents respond to incentives?
a. How Converse sneakers reduce their tariffs#
b. Cesarian-section deliveries when rewards are higher
2. Supply and demand
3. Elasticities and revenues
The London congestion charge.
4. Two-sided markets.
What Spotify is doing.
5. Barriers to entry. See table 1 for a very good summary of natural and strategic entry barriers in UK banking, especially around IT and capital regulation.