世界发展银行-Benefits-and-Costs-of-Debt-_-The-Dose-Makes-the-Poison_39页_487kb

Summary of "Benefits and Costs of Debt: The Dose Makes the Poison"

Core Content

This working paper by M. Ayhan Kose, Franziska Ohnsorge, and Naotaka Sugawara analyzes the benefits and costs of government debt in emerging market and developing economies (EMDEs), emphasizing the trade-offs between leveraging low interest rates and the risks of excessive debt accumulation.

Main Findings

• Government debt in EMDEs has risen significantly since the global financial crisis, reaching levels similar to those of the early 2000s.
• Low global interest rates and weak economic growth have created an environment where debt accumulation may seem beneficial, but history warns against complacency.
• Debt sustainability has worsened in EMDEs, with half of them experiencing rising debt trajectories from 2018.
• No single optimal debt level exists for all countries; it depends on country-specific factors, financial market conditions, and government behavior.

Benefits of Debt

1. Promoting Long-Term Growth

• Government investment in physical and human capital can enhance long-term growth potential.
• Infrastructure development is crucial for meeting development goals and improving living standards.
• Investment needs for EMDEs to achieve the Sustainable Development Goals (SDGs) are estimated at 4.5 to 8.2 percent of GDP annually.
• Regional disparities exist, with some areas like Africa requiring up to 130 to 170 billion dollars in annual infrastructure investment.

2. Stabilizing Short-Term Macroeconomic Fluctuations

• Fiscal policy can be used to stabilize the economy during downturns by increasing government spending or reducing taxes.
• Fiscal multipliers vary depending on the economic cycle, country characteristics, and monetary policy.
• Fiscal policy in EMDEs has become less procyclical since the 2000s, with some evidence of countercyclical behavior post-crisis.

3. Providing Safe Assets

• Government debt acts as a safe asset for investors, especially during times of increased risk aversion.
• The availability of government debt instruments is essential for monetary policy operations and financial deepening.
• Safe assets can help ease financing constraints for private sectors by serving as collateral or benchmarking private borrowing costs.

Costs of Debt

1. Deteriorating Debt Sustainability

• Debt sustainability is influenced by interest rate-growth differentials and fiscal balances.
• Sustainability gaps measure the difference between a country’s fiscal balance and the balance required to stabilize debt at a target level.
• In many EMDEs, primary fiscal deficits have led to rising debt levels, even with low interest rates.
• Debt sustainability has declined since the global financial crisis, with negative sustainability gaps in over 50% of EMDEs in 2018.

2. Increasing Vulnerability to Financial Crises

• High debt levels increase the risk of financial crises, including currency crises, banking crises, and debt distress.
• Debt rollover risk rises sharply during periods of financial stress, potentially triggering sovereign debt crises.
• Private sector debt can spill over to the government balance sheet during financial crises, increasing public debt.

Key Quotes and Insights

• "Public debt is not a free lunch in an economy close to full employment." – Barry Eichengreen (2019)
• "High debt levels make it more difficult for governments to respond aggressively to shocks." – Kenneth Rogoff (2019a)
• "The notion that additional debt is a free lunch is foolish." – Kenneth Rogoff (2019a)
• "Debt service will account for a rising share of spending, and the high debt will likely increase interest rates [...] leading to an economically perilous debt spiral." – John B. Taylor (2020)

Conclusion

EMDEs must strike a careful balance between taking advantage of low interest rates and avoiding the risks of high debt. While debt can support growth and stabilization, excessive accumulation can lead to financial instability and long-term growth constraints. The sustainability of debt is not solely determined by the interest rate-growth differential, but also by fiscal policy, financial market development, and country-specific conditions.