2007年-世界发展银行全球_Do_Some_Forms_of_Financial_Flows_Help_Protect_Against_Sudden_Stops__23页_336kb

Summary of "Do Some Forms of Financial Flows Help Protect Against 'Sudden Stops'?"

Core Content

This article by Levchenko and Mauro investigates whether certain types of financial flows provide better protection against "sudden stops"—sharp declines in net financial inflows of more than 5 percentage points of GDP. Using a large panel dataset covering 1970–2003 for 142 countries, the authors analyze the behavior of six types of financial flows: foreign direct investment (FDI), portfolio debt investment, portfolio equity investment, other flows to the official sector, other flows to banks, and other flows to the nonbank private sector. The study focuses on how these flows behave during financial crises and whether their characteristics can offer insights into crisis resilience.

Main Findings

1. Volatility of Financial Flows

• FDI is the least volatile form of financial flow across all economies, consistent with conventional wisdom.
• Portfolio debt is more volatile than FDI in advanced economies, but less so in developing economies.
• Portfolio equity and other flows to banks are highly volatile in developing economies.
• Other flows to the official sector are also volatile in developing economies, though less than portfolio equity.
• During sudden stops, FDI remains remarkably stable, while portfolio debt experiences a sharp reversal but recovers quickly. Other flows (including bank lending and trade credit) suffer severe drops and often remain depressed for years.

2. Persistence of Financial Flows

• Financial flows in advanced economies are more persistent (AR(1) coefficient of 0.7) than those in emerging and developing economies (AR(1) coefficient of 0.5).
• In emerging economies, FDI is the most persistent type of flow (AR(1) = 0.5), while portfolio debt investment is the least persistent (AR(1) ≈ 0).
• In developing economies, FDI has moderate persistence (AR(1) = 0.35), while portfolio debt and portfolio equity have similar persistence levels (AR(1) between 0.2 and 0.5).
• The persistence of financial flows is largely driven by the size of the flows and is not significantly affected by the type of flow.

3. Correlation with Economic Growth

• Financial flows in emerging and developing economies are mildly procyclical, meaning they tend to increase during periods of economic growth.
• FDI is the most correlated with domestic growth in developing economies (correlation = 0.2).
• Portfolio equity investment is the only type of flow that shows a significant correlation with G-7 growth in developing economies (correlation = 0.2).
• FDI is negatively correlated with U.S. interest rates in both emerging and developing economies, suggesting that FDI inflows may decrease when global interest rates rise.

4. Behavior During Sudden Stops

• During sudden stops, FDI is remarkably stable, and portfolio equity plays a limited role.
• Portfolio debt experiences a sharp reversal but recovers relatively quickly.
• Other flows (to banks and nonbank private sector) are severely affected and often remain depressed for years.
• The stability of FDI during sudden stops is striking, especially given its large share in total financial flows.

5. Data and Methodology

• Financial flows are normalized by GDP to assess their relative importance.
• The coefficient of variation (standard deviation divided by the mean) is used to measure relative volatility.
• The study uses event studies and principal components analysis to assess comovement across countries.
• The data excludes exceptional financing, IMF credit, and changes in reserves.
• Coverage is sparse for some flow types, especially portfolio equity, which is available for only 12 developing economies.

Key Information

• The article updates and builds on previous studies, such as those by Claessens, Dooley, and Warner (1995), Fernández-Arias and Hausmann (2001), and Faria and Mauro (2004).
• FDI is considered more stable and less likely to trigger financial crises, especially during sudden stops.
• Portfolio debt is more volatile in advanced economies than in developing ones.
• Correlations with U.S. interest rates are generally small, except for FDI, which is negatively correlated.
• Comovement is analyzed using principal components, showing that FDI has a lower share of variation explained by common components, indicating it is less correlated with other countries’ flows.

Conclusion

The study suggests that while some aspects of conventional wisdom are confirmed—such as the lower volatility of FDI—others are not. FDI is relatively stable and less affected by sudden stops, making it a more resilient form of financial flow. However, the behavior of different flow types varies significantly across economic groups and types of crises, indicating that no single flow is universally safe. The findings emphasize the importance of understanding the composition of external liabilities and how different types of financial flows respond to economic shocks and policy changes.