In the United States, we now take our ability to pay with plastic for granted. In other parts of the world, however, the establishment of a “credit-card economy” has not been easy. In countries without a history of economic stability, how can banks decide who should be given a credit card? How do markets convince people to use cards, make their transactions visible to authorities, assume the potential risk of fraud, and pay to use their own money? Alya Guseva, Boston University discusses in this insight.