In a market where consumers choose between payment options, and firms compete with products and prices, we show that payment data drives the formation of a market monopoly. Active intervention can successfully restore and maintain a competitive market, but often at the expense of both efficiency...

We model how a cyber attack may be amplified through the U.S. financial system, focusing on the wholesale payments network. We estimate that the impairment of any of the five most active U.S. banks will result in significant spillovers to other banks, with 38 percent of the network affected on...

I develop a framework of the build-up and outbreak of financial crises in an asymmetric information setting. In equilibrium, two distinct economic states arise endogenously: normal times – periods of modest investment, and booms – periods of expansionary investment. Normal times occur when...