Payment scale economies affect banking costs, competition in payment services, and pricing. Our scale measure relates operating cost to physical measures of European banking "output", finding large economies. This differs from relating total cost to the value of balance sheet assets (the...

A new wave of technological innovations, often called 'fintech,' is accelerating change in the financial sector. What impact might fintech have on financial services, and how should regulation respond? This paper sets out an economic framework for thinking through the channels by which fintech...