2016年-IMF国际货币组织全球_Spillover_Notes_49页_3mb

Summary of Regional Spillovers in Sub-Saharan Africa: Exploring Different Channels

Core Content

This document explores the various channels through which economic activity in sub-Saharan Africa (SSA) can spill over to other countries in the region. It highlights the increasing interdependence among SSA economies, particularly through trade, banking, remittances, investment, fiscal, and security-related mechanisms. The study uses a combination of econometric analysis, data from the IMF and other sources, and empirical estimates to assess the magnitude and direction of these spillovers.

Main Points

1. Regional Trade Links Gaining Strength

• Intraregional trade has grown significantly over the past 35 years, increasing from 6% of total exports in 1980 to 20% in 2016.
• Trade integration has been faster in smaller, more open economies, such as those in the SACU (Southern African Customs Union).
• Major trade corridors include the SACU, SADC (Southern African Development Community), and EAC (East African Community), where subregional trade constitutes over 80% of intraregional trade for some members.
• Trade spillovers are more pronounced within subregions than across the entire region due to the concentration of trade flows.
• Top 10 importers account for 65% of regional demand, with South Africa, Botswana, and Namibia being the largest importers.
• Countries like Swaziland, Lesotho, and Zimbabwe have over 65% of their exports directed within SSA, making them highly susceptible to regional economic fluctuations.

2. Banking Interdependence Becoming More Subregional

• Pan-African banks (PABs) and subregional banks are playing an increasingly important role in the financial system of SSA.
• South Africa is a major player in the banking sector, with its sovereign debt spreads influencing other frontier markets.
• Correspondent banking relationships have evolved, with African banks becoming more integrated into the global financial system.
• Private sector credit growth in recipient countries is significantly influenced by the economic performance of countries with strong banking ties.
• The SACU revenue-sharing formula ties fiscal revenues of member states to South African economic performance, leading to medium-term volatility and complicating fiscal management in smaller countries.

3. The Dominant Role of South Africa in Sovereign Spread Spillovers

• South Africa's economic performance has a significant impact on sovereign debt spreads in other SSA countries.
• A 5 percentage point increase in the export-weighted growth rate of intraregional partners is associated with a 0.5 percentage point increase in the average growth of SSA countries.
• The SACU revenue-sharing formula is a key mechanism through which fiscal policy in South Africa affects its neighbors.
• Sovereign spread correlations show that South Africa's financial conditions have a major influence on other SSA countries, especially in frontier markets.

4. The Changing Pattern of Remittance Flows

• Remittances have become a more important source of external financing for SSA countries.
• Regional remittance flows are concentrated in a few corridors, with Côte d'Ivoire and Ghana being key sources for West Africa, and South Africa for Southern and East Africa.
• Cost reductions in remittance sending have been driven by the development of mobile money, contributing to the observed increase in remittance flows.
• The cost of remittances in SSA remains the highest globally, suggesting potential for further efficiency gains.
• Growth in remittance-sending countries is significantly associated with growth in receiving countries, though this is partially offset by trade-related spillovers.

5. The Fiscal Channel – Unintended Consequences

• Fiscal policies in large SSA countries, such as Nigeria's fuel pricing and SACU revenue-sharing, have unintended spillover effects on neighboring countries.
• Nigeria's subsidized fuel prices lead to smuggling and tax base erosion in countries like Benin and Togo.
• The SACU revenue-sharing formula leads to fiscal volatility in smaller member states, complicating their economic planning.

6. The Rising Socioeconomic Impact of Forced Migration

• Forced migration due to conflict and security issues has become a growing concern in SSA.
• The main negative spillovers include reduced economic activity, humanitarian damage, and fiscal costs associated with hosting displaced persons and fighting terrorism.
• Terrorism and civil conflict in the Sahel, Lake Chad, the eastern DRC, Somalia, and South Sudan are the primary drivers of involuntary migration.
• The socioeconomic costs of migration have increased, with the pace of decline in forced migration slowing or reversing in recent years.

Key Findings

• Interdependence among SSA countries is higher than generally assumed, especially through trade, banking, and remittance channels.
• Regional integration is more extensive than overall integration, with subregional integration progressing faster.
• South Africa is the dominant source of regional FDI and has a significant impact on sovereign spreads and trade.
• Remittances have outpaced other forms of external financing, such as aid and FDI, and are increasingly important for economic growth.
• Fiscal policies in large countries can have negative spillover effects, particularly through commodity pricing and tax systems.
• Security issues such as terrorism and civil unrest are increasingly affecting economic and social stability in the region.

Conclusion

The study emphasizes the need for enhanced regional surveillance and spillover analysis in addition to traditional bilateral approaches. It underscores that economic trends in key countries can have significant cross-border impacts, and that understanding these channels is essential for effective regional policy-making and economic forecasting.