It takes many years for more efficient electronic payments to be widely used, and the fees thatmerchants (consumers) pay for using those services are increasing (decreasing) over time. Weaddress these puzzles by studying payments system evolution with a dynamic model in a twosidedmarket setting....

Financial risks outside of the traditional banking sector can quickly spread throughout financial systems and lead to disruptions in the real economy. A lack of adequately detailed financial sector statistics can obscure buildups of risks from policymakers and hinder their ability to effectively...