The 2015 Addis Ababa Action Agenda recognized the need for policies aimed at maintaining longterm debt sustainability. This paper describes a set of commonly used definitions of debt sustainability and shows that none of them focuses on long-term debt sustainability. It then discusses concept...

This paper shows that the patterns of optimal tax rates and borrowing in the presence of endogenous borrowing constraints differ considerably from the patterns observed with fully integrated capital markets. We study a developing country characterized by a costly tax collection. Its access to...

Analysis of public debt in developing countries has traditionally focused on external debt. However, in recent years, several developing countries adopted aggressive policies aimed at retiring public external debt and substituting it with domestically issued debt. This paper discusses...

This article reviews recent economic and legal literature on sovereign debt in light of the COVID-19 shock. Most of the core theoretical contributions across the two disciplines hinge on immunity, and the sovereign borrower's consequent inability to commit to repay foreign creditors, as the...

We review the state of the sovereign debt literature and point out that the canonical model of sovereign debt cannot be easily reconciled with several facts about sovereign debt pricing and servicing. We identify and classify twenty puzzles. Some are well known and documented, others are less so...