In this note, the authors reexamine the issue of debt sustainability in a large group of advanced economies. Their hypothesis is that, when debt is in a moderate range, its dynamics are sustainable in the sense that increases in debt elicit sufficient increases in primary fiscal balances to...

This paper studies how the strength of social ties are affected by the geographical location of other individuals and their social capital. We characterize the equilibrium in terms of both social interactions and social capital. We show that lower travel costs increase not only the interaction...

This paper examines how debt maturity affects the debt limit, defined as the maximum amount of debt a government can afford without defaulting. We develop a model where investors are risk neutral, the primary balance is stochastic but exogenous, and default occurs solely due to the government's...

This paper studies the effect of demographic change on national saving, global interest rates, and international capital flows, focusing on the role of the public pension system. We develop a small open economy overlapping generations model to illustrate the channels through which demographic...

Korea is facing mounting economic challenges. Productivity growth has been on a trend decline amid demographic headwinds, while the societal demand for inclusive growth has been on a steep rise. Furthermore, the government-led unbalanced growth model-which served Korea well in the past-has...

Noting that the aftermath of the global financial crisis has left many advanced economies with very high sovereign debt ratios and some emerging markets with high debt, this report considers whether there are ways to expand fiscal space that do not involve countries paying down debt or promising...

Low-income countries routinely experience exogenous disturbances—sharp swings in the terms of trade, export demand, natural disasters, and volatile financial flows—that contribute to higher volatility in aggregate output and consumption compared with other countries. Assessing Reserve...

This paper develops a cost-benefit approach that helps to quantify the optimal level of international reserves in low-income countries, focusing on the role of reserves in preventing and mitigating absorption drops triggered by large external shocks. The approach is applied to a sample of 49...