纽约联储-外部经济（中国、欧洲）放缓对美国经济的影响（英文）-2020.10-15页_369kb

Summary of "The Impact of Foreign Slowdown on the U.S. Economy: An Open Economy DSGE Perspective"

Core Content

This article analyzes the impact of foreign economic slowdowns on the U.S. economy using a multi-country dynamic stochastic general equilibrium (DSGE) model called SIGMA. The study focuses on the euro area and China as the primary sources of global economic slowdown, and evaluates how financial integration and policy space limitations influence the transmission of these shocks to the U.S. economy.

Main Viewpoints

• Global Economic Slowdown: In 2018, economic activity in major foreign economies, including the euro area and China, slowed down significantly. Growth forecasts for 2019 and 2020 were also revised downward, indicating potential headwinds for the U.S. economy.

• Financial Integration and Shock Transmission: The U.S. economy is more financially integrated with the Advanced Foreign Economy (AFE) bloc (which includes the euro area) than with the Emerging Market Economy (EME) bloc (which includes China). This integration plays a critical role in how demand shocks from other regions affect the U.S.

• Role of Policy Space: When policy space is limited (e.g., due to the zero lower bound on interest rates), the effects of financial integration on U.S. economic performance are amplified, leading to more severe contractions.

Key Findings

• Euro Area Slowdown: A slowdown in the euro area leads to a more significant negative impact on the U.S. economy compared to a slowdown in China. This is due to the greater financial integration between the U.S. and the AFE bloc, which results in larger capital outflows and a stronger depreciation of the AFE currency against the U.S. dollar, thereby increasing the U.S. trade deficit and worsening the U.S. economic outlook.

• China-led Slowdown: While a slowdown in China also affects the U.S. economy, the impact is quantitatively smaller. This is attributed to the lower level of financial integration between the U.S. and the EME bloc, as well as the relatively smaller magnitude of the expenditure-switching effect.

• Monetary Policy Response: In the case of the euro area slowdown, with policy space unrestricted, the U.S. real GDP decreases by about 0.25% by mid-2020. When policy space is constrained (ZLB), the contraction becomes more severe, with U.S. real GDP falling by around 0.4% by mid-2020.

• Trade and Financial Linkages: The model highlights how trade and financial linkages between the U.S. and other economies influence the transmission of shocks. In the case of the AFE bloc, the depreciation of the AFE currency against the U.S. dollar leads to a larger trade deficit and a more pronounced impact on U.S. GDP.

Simulation Methodology

• The authors use a three-country version of the SIGMA model, calibrated to the U.S., AFE bloc, and EME bloc.
• The model incorporates inertial Taylor rules for monetary policy, with a zero lower bound (ZLB) constraint for the AFE bloc.
• The exchange rate dynamics are modeled using a modified uncovered interest parity equation, which accounts for financial frictions and portfolio rebalancing costs.

Structural Parameters

• The model assumes identical structural parameters for each bloc, except for:
  • Population size
  • Trade openness
  • Financial integration
• The U.S. imports are about 14% of GDP, and 55% of U.S. trade is with EMEs, consistent with real-world data.
• The U.S. economy accounts for 20% of global output, while the AFE bloc accounts for 28%.

Policy Implications

• The greater financial integration between the U.S. and AFE blocs enhances the transmission of shocks, making the U.S. more vulnerable to slowdowns in Europe.
• Limited policy space in the AFE bloc exacerbates the effects of financial integration, leading to a more severe U.S. economic contraction.
• The trade and financial linkages are crucial in determining the magnitude of the spillover effects from foreign economies to the U.S.

Conclusion

• The U.S. economic impact is more pronounced from a slowdown in the euro area than from a slowdown in China, primarily due to the higher level of financial integration between the U.S. and the AFE bloc.
• The DSGE model provides a robust framework for analyzing these spillovers, highlighting the importance of both financial integration and monetary policy space in shaping the U.S. macroeconomic outlook in response to global demand shocks.