BIS国际清算银行-What-comes-next-Recovery-from-an-uneven-recession_9页_625kb
报告摘要
BIS Bulletin No 33: What comes next? Recovery from an uneven recession
Core Content
This BIS Bulletin, authored by Daniel Rees, explores the uneven impact of the Covid-19 crisis on different industries and its aggregate economic implications. It highlights how the recovery is not uniform across sectors, with customer service industries suffering disproportionately due to both supply-side constraints (e.g., regulatory restrictions, reduced customer numbers) and demand-side shifts (e.g., behavioral changes in consumer preferences). The analysis suggests that while some economies may recover more quickly, others may face prolonged periods of economic underperformance.
Key Takeaways
- Uneven impact of the pandemic: The effects of the Covid crisis have been uneven across sectors, with customer service industries experiencing significant declines in output.
- Persistent weakness: Even after containment measures are relaxed, customer service industries may remain below pre-Covid output levels for several years.
- Aggregate implications vary: The recovery of the overall economy depends on the nature of the industry-level disturbances (supply vs. demand) and the composition of the economy.
- "98% economy" scenario: Large advanced economies could experience a GDP recovery to at best 98% of pre-Covid levels due to ongoing constraints on customer service sectors.
- China's outlook is more positive: China's economy, which is less reliant on customer service industries, is expected to recover closer to its pre-crisis trend by late 2021.
- Uncertainty remains: The timing and severity of the recovery depend heavily on the development of vaccines and the effectiveness of public health measures.
An Uneven Recession and Recovery
- The Covid recession has shown unusually large sectoral dispersion in GDP growth, more so than previous crises like the 2007-09 financial crisis.
- The recovery has also been uneven, with some industries rebounding quickly, while others like hospitality and tourism are recovering more slowly.
- Constraints on customer service industries persist due to regulatory restrictions and behavioral changes in consumer habits.
- These constraints could last until a vaccine or effective treatment becomes widely available.
Aggregate Implications of Industry Disturbances
- The aggregate economic impact depends on the source of industry-level disturbances:
- Supply disturbances reduce overall efficiency, leading to a decline in aggregate GDP.
- Demand disturbances result in a smaller or even positive impact on GDP, as income shifts from one sector to another.
- The model simulations suggest that:
- Large advanced economies may face a "98% economy" due to lower potential output.
- China is expected to recover closer to its pre-crisis trend, as its economy is less dependent on customer services.
- The persistence of constraints on customer service industries is a key determinant of the recovery speed.
Industry-Level Recovery Projections
- The model projects that customer service industries will remain below pre-Covid output levels for several years.
- In large advanced economies, output is expected to be 10% below pre-Covid levels until these constraints ease.
- In China, the deviation is expected to be around 5%.
- Other industries may recover more quickly due to income and substitution effects:
- Income effects reduce output due to lower aggregate economic activity.
- Substitution effects shift demand away from customer services to other sectors, helping the rest of the economy recover.
- Intermediate input effects also play a role, as reduced demand for goods and services in customer service production affects other industries.
Outlook and Uncertainties
- The model results are based on assumptions about the persistence and severity of constraints on customer service industries.
- If vaccines are effective and public health measures are relaxed, the recovery could be much faster, with GDP returning to pre-Covid levels by late 2021.
- However, if constraints remain tight (e.g., until mid-2025), large advanced economies may face a "96% economy".
- Second waves of the virus could lead to precautionary saving and delayed investment, further slowing the recovery.
Conclusion
- The uneven recovery at the industry level has significant aggregate implications, particularly for customer service industries.
- While demand stimulus is necessary, it may not be sufficient to restore pre-Crisis GDP levels without controlling the virus and reallocation of resources.
- The model does not account for financial stability implications, such as increased corporate bankruptcies, which could arise from an uneven recovery.
References
- Banerjee, R, G Cornelli and E Zakrajšek (2020): "The outlook for business bankruptcies", BIS Bulletin, no 30, October.
- The Economist (2020): "The 90% economy that lockdowns will leave behind", 30 April.
- Gourinchas, P-O, S Kalemli-Özcan, V Penciakova and N Sander (2020), "Covid-19 and SME Failures", NBER Working Papers, no 27877.
- Guerrieri, V, G Lorenzoni, L Straub and I Werning (2020), "Macroeconomic Implications of COVID-19: can negative supply shocks cause demand shortages", NBER Working Papers, no 26918.
- Rees, D (2020): "What comes next?", BIS Working Papers, no 898, November.
- Woodford, M (2020): "Effective demand failures and the limits of monetary stabilization policy", NBER Working Papers, no 27768.
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