We show that debt is sustainable at a competitive equilibrium based solely on the reputation for repayment; that is, even without collateral or legal sanctions available to creditors. In an incomplete asset market, when the rate of interest falls recurrently below the rate of growth of the...

We show that sovereign debt is unsustainable if debt contracts are not supported by direct sanctions and default carries only a ban from ever borrowing in financial markets even in the presence of uninsurable risks and time-varying interest rate. This extension of Bulow and Rogoff, 1989 requires...

"Social interaction is essential to human life. How do people choose what to do when they encounter one another? And how do organizations, firms or countries interact? Game Theory is a modeling tool designed to represent and analyze such strategic interaction. The first part of this book is...