This paper presents the DIGNAR (Debt, Investment, Growth, and Natural Resources) model, which can be used to analyze the debt sustainability and macroeconomic effects of public investment plans in resource-abundant developing countries. DIGNAR is a dynamic, stochastic model of a small open economy. It has two types of households, including poor households with no access to financial markets, and features traded and nontraded sectors as well as a natural resource sector. Public capital enters production technologies, while public investment is subject to inefficiencies and absorptive capacity constraints. The government has access to different types of debt (concessional, domestic and external commercial) and a resource fund, which can be used to finance public investment plans. The resource fund can also serve as a buffer to absorb fiscal balances for given projections of resource revenues and public investment plans. When the fund is drawn down to its minimal value, a combination of external and domestic borrowing can be used to cover the fiscal gap in the short to medium run. Fiscal adjustments through tax rates and government non-capital expenditures—which may be constrained by ceilings and floors, respectively—are then triggered to maintain debt sustainability. The paper illustrates how the model can be particularly useful to assess debt sustainability in countries that borrow against future resource revenues to scale up public investment.

This paper provides new evidence of the macroeconomic effects of public investment in advanced economies. Using public investment forecast errors to identify the causal effect of government investment in a sample of 17 OECD economies since 1985 and model simulations, the paper finds that increased public investment raises output, both in the short term and in the long term, crowds in private investment, and reduces unemployment. Several factors shape the macroeconomic effects of public investment. When there is economic slack and monetary accommodation, demand effects are stronger, and the public-debt-to-GDP ratio may actually decline. Public investment is also more effective in boosting output in countries with higher public investment efficiency and when it is financed by issuing debt.

As countries recover from the coronavirus pandemic, they are confronted with an even more challenging debt crisis. Xavier Debrun argues in the foreword that in deciding where we go from here that there is no longer a consensus regarding the optimum design and enforcement of fiscal rules. Rather we must address a series of questions and challenges to the conventional wisdom. This book provides an opportunity for scholars to explore these questions from an international perspective, with reference to European countries, and emerging nations as well as the United States.

Addressing the global financial crisis has required fiscal intervention on a substantial scale by governments around the world. The consequent buildup of public debt, in particular its sustainability, has moved to center stage in the policy debate. If the Asia and Pacific region is to continue to serve as an engine for global growth, its public debt must be sustainable. Public Debt Sustainability in Developing Asia addresses this issue for Asia and the Pacific as a whole as well as for three of the most dynamic economies in the region: the People’s Republic of China, India, and Viet Nam. The book begins with a discussion of the reasons for increased attention to debt-related issues. It also introduces fiscal indicators for the Asian Development. Bank’s developing member countries and economies. The sustainability of their debt is assessed through extant approaches and with the most up-to-date data sources. The book also surveys the existing literature on debt sustainability, outlining the main issues related to it, and discusses the key implications for the application of debt sustainability analysis in developing Asia. Also highlighted is the importance of conducting individual country studies in view of wide variations in definitions of public expenditure, revenues, contingent liabilities, government structures (e.g., federal), and the like, as well as the impact of debt on interest rates. The book further provides in-depth debt sustainability analyses for the People’s Republic of China, India, and Viet Nam. Public Debt Sustainability in Developing Asia offers a comprehensive analytical and empirical update on the sustainability of public debt in the region. It breaks new ground in examining characteristics that are crucial to understanding sustainability and offers richer policy analysis that should prove useful for policymakers, researchers, and graduate students.

This paper introduces a new index that captures the institutional environment underpinning public investment management across four different stages: project appraisal, selection, implementation, and evaluation. Covering 71 countries, including 40 low-income countries, the index allows for benchmarking across regions and country groups and for nuanced policy-relevant analysis and identification of specific areas where reform efforts could be prioritized. Potential research venues are outlined.

This paper explores the impact of high public debt on long-run economic growth. The analysis, based on a panel of advanced and emerging economies over almost four decades, takes into account a broad range of determinants of growth as well as various estimation issues including reverse causality and endogeneity. In addition, threshold effects, nonlinearities, and differences between advanced and emerging market economies are examined. The empirical results suggest an inverse relationship between initial debt and subsequent growth, controlling for other determinants of growth: on average, a 10 percentage point increase in the initial debt-to-GDP ratio is associated with a slowdown in annual real per capita GDP growth of around 0.2 percentage points per year, with the impact being somewhat smaller in advanced economies. There is some evidence of nonlinearity with higher levels of initial debt having a proportionately larger negative effect on subsequent growth. Analysis of the components of growth suggests that the adverse effect largely reflects a slowdown in labor productivity growth mainly due to reduced investment and slower growth of capital stock.

The global economy has experienced four waves of rapid debt accumulation over the past 50 years. The first three debt waves ended with financial crises in many emerging market and developing economies. During the current wave, which started in 2010, the increase in debt in these economies has already been larger, faster, and broader-based than in the previous three waves. Current low interest rates mitigate some of the risks associated with high debt. However, emerging market and developing economies are also confronted by weak growth prospects, mounting vulnerabilities, and elevated global risks. A menu of policy options is available to reduce the likelihood that the current debt wave will end in crisis and, if crises do take place, will alleviate their impact.