2015年-IMF国际货币组织全球_Hong_Kong’s_Growth_Synchronization_with_China_and_the_US_A_Trend_and_Cycle_Analysis_27页_658kb

Summary of "Hong Kong's Growth Synchronization with China and the U.S.: A Trend and Cycle Analysis"

Core Content

This working paper analyzes the synchronization of Hong Kong SAR's economic growth with mainland China and the United States, focusing on both trend growth and business cycle fluctuations. The study uses stochastic trend and structural vector autoregression (SVAR) models to decompose economic shocks into permanent and transitory components and assess their impact on Hong Kong's economy.

The paper explores the economic integration between Hong Kong and mainland China, as well as the external demand from the United States, and investigates how these factors influence Hong Kong's economic performance. It also examines the role of the linked exchange rate system (LERS) in transmitting U.S. shocks to Hong Kong.

Main Findings

• Transitory shocks from the U.S. remain a major driver of Hong Kong SAR's business cycle fluctuations.
• Permanent shocks from mainland China have a larger impact on Hong Kong SAR's trend growth.
• Hong Kong SAR and mainland China share a strong co-movement in long-run trend growth.
• The permanent income hypothesis is partially supported for Hong Kong and mainland China, as consumption appears to respond to both permanent and transitory income changes, though not strictly to permanent income only.
• The U.S. share in Hong Kong's non-tourism services exports remains higher than mainland China, suggesting continued demand-side influence from the U.S.
• Financial services in Hong Kong, especially those related to offshore RMB bonds and FDI, show strong integration with the mainland, indicating supply-side dependence on mainland economic developments.

Key Points

Economic Integration

• Hong Kong SAR has become increasingly integrated with mainland China, particularly in trade and finance.
• However, value-added exports to the U.S. remain significant, especially in financial services.
• Mainland China is a dominant export destination for tourism services, with its share rising from 28% to 66% between 2000 and 2012.
• FDI flows show that mainland China is becoming a more important source of inward investment and a major destination for outward investment from Hong Kong.

Trends and Cycles

• The permanent income hypothesis is used to identify stochastic trends in economic data.
• Real consumption in Hong Kong and mainland China is cointegrated with real GDP, suggesting a common stochastic trend.
• The error correction coefficients in the VECM indicate that consumption adjusts relatively quickly to deviations from the long-run relationship, suggesting some sensitivity to transitory shocks.
• Transitory shocks from the U.S. have a more immediate impact on Hong Kong's business cycle, while permanent shocks from the mainland influence trend growth more significantly.

Methodology

• The study uses state-space models to decompose income into permanent and transitory components.
• Structural vector autoregression (SVAR) models are employed to analyze the transmission of shocks from China and the U.S. to Hong Kong.
• Unit root and cointegration tests are used to assess the stationarity of economic variables and their long-run relationship.
• The VECM results show that consumption in Hong Kong and mainland China is not fully predictable by anticipated transitory income changes, though there is some response.

Implications

• The U.S. remains a key external demand driver for Hong Kong's goods exports, despite the rise in mainland China's share.
• The linked exchange rate system with the U.S. dollar enhances the transmission of U.S. shocks to Hong Kong.
• Financial integration with the mainland is a major contributor to Hong Kong's productivity growth.
• The trend and cycle components of Hong Kong's economic growth are driven by different external forces, with permanent shocks from the mainland and transitory shocks from the U.S. playing dominant roles.

Conclusion

The paper concludes that while mainland China has become a major force in trend growth, the U.S. continues to play a significant role in business cycle fluctuations. This highlights the dual role of Hong Kong as a gateway between the mainland and the global economy, and as a financial hub influenced by both domestic and international factors.

Figures and Tables Overview

• Figure 1–3 show the value-added shares of exports to the mainland and the U.S., emphasizing the U.S. role in financial services and the mainland's role in tourism and FDI.
• Figure 4–7 illustrate the increasing importance of the mainland as a source and destination of FDI, and the growth of RMB bonds and stock market capitalization.
• Figure 8–9 highlight the rise in labor productivity and service sector growth in Hong Kong, linked to economic transformation and mainland integration.
• Tables 1–4 present unit root, cointegration, and VECM results, supporting the partial validity of the permanent income hypothesis and the different impacts of permanent and transitory shocks on Hong Kong's economy.