IMF-加强爱尔兰财政框架的选择（英）-2025.7_36页_1mb

Summary of "Options for Strengthening Ireland's Fiscal Framework"

Core Content

This paper explores the need for a stronger fiscal framework in Ireland, focusing on the risks posed by the concentration of corporate income tax (CIT) revenues from multinational enterprises (MNEs) and the challenges of maintaining fiscal sustainability amid global uncertainty and future spending pressures. The authors propose a medium-term debt anchor and expenditure ceilings as key components of a robust fiscal framework tailored to Ireland's unique economic structure.

Main Views and Key Information

1. Risks to Ireland's Fiscal Framework

• Concentration of CIT Revenues: Ireland's fiscal position is heavily reliant on CIT from a small number of MNEs, which introduces significant volatility and uncertainty.
• Exposure to External Shocks: MNEs' operations are subject to global factors, including trade and tax policy changes, which can lead to sudden revenue declines.
• Procyclical Spending Pressures: Without a structured fiscal rule, spending can be too high during good times, leading to fiscal imbalances and reduced resilience.
• Need for Long-term Buffers: Future pressures such as climate change, aging population, and digital transformation require adequate fiscal buffers to ensure long-term stability and support public investment.

2. Proposed Fiscal Framework

• Medium-term Debt Anchor: A prudent debt anchor is recommended to guide fiscal policy and ensure macroeconomic stability and debt sustainability.
• Expenditure Ceilings: Multi-year expenditure ceilings are proposed to complement the debt anchor, ensuring that spending remains aligned with fiscal goals.
• Fiscal Reaction Function (FRF): A tool for guiding the calibration of expenditure rules based on the economic cycle, public debt, and past fiscal performance.

3. Methodology and Calibration

• Risk-Based Approach: The authors use a risk-based framework to calibrate the debt anchor, incorporating both top-down and bottom-up analyses.
• Top-down FDI Analysis: Historical FDI data from similar small and open economies are used to simulate potential FDI-related risks for Ireland.
• Bottom-up Firm Analysis: Firm-level data are used to estimate sector-specific CIT volatility and the impact of MNE operational changes.
• Calibration Results:
  • A net debt to GNI ratio* of around 40% is suggested as a prudent debt anchor.
  • Gross debt to GDP of 40% is also considered prudent.
  • The debt anchor is set to ensure that the probability of exceeding the 60% EU debt-to-GDP benchmark is low.

4. Spending Growth and Fiscal Sustainability

• Spending Growth Scenarios:
  • A 5% annual nominal expenditure growth is consistent with a 40% debt anchor and supports long-term fiscal sustainability.
  • A 6% growth may still be compatible with the debt anchor but could lead to rising debt toward the end of the simulation period.
  • Higher growth rates may not be sustainable over the long term, especially under a 4.25% revenue growth assumption.
• Importance of Expenditure Rules: These are considered more effective in reducing procyclicality and are easier to monitor and enforce compared to other types of fiscal rules.

5. Operational Fiscal Rule

• Multi-Year Expenditure Ceilings: These are recommended to align with the debt anchor and ensure fiscal discipline.
• Implementation Considerations:
  • The rule should cover all institutions under the general government classification.
  • It should be supported by an escape clause, triggering conditions, correction mechanisms, independent oversight, and periodic reviews.
  • The rule should be linked to annual budgets and the medium-term fiscal and structural plan.

6. Fiscal Reaction Function (FRF)

• Definition: A typical FRF sets the primary balance as a function of the economic cycle, public debt, and past fiscal performance.
• Equation:
  $$
  p_{t+1} = \beta_0 p_t + \beta_1 \gamma_t + \beta_2 b_t
  $$
  Where:
  • $p_t$ is the primary balance
  • $\gamma_t$ is the output gap or other cyclical indicators
  • $b_t$ is the public debt level
• Calibration:
  • The FRF is calibrated using economic models that incorporate policy objectives, fiscal multipliers, and sustainability conditions.
  • In the absence of reliable historical data, theoretical frameworks are used to guide the calibration.
  • The calibrated FRF suggests an average nominal expenditure growth of 5–6% in the medium term.

Conclusion

A well-designed fiscal framework is essential for safeguarding Ireland's long-term fiscal sustainability while maintaining economic flexibility. The proposed framework includes a prudent debt anchor and multi-year expenditure ceilings, supported by a fiscal reaction function. This approach enhances the credibility and predictability of fiscal policy, which is crucial for maintaining public and private investment confidence. The methodology used has broader applicability for designing fiscal rules in other economies, provided sufficient data are available to quantify relevant risks.

Key Elements of the Proposed Framework

• Debt Anchor:
  • Set at 40% of GDP or GNI*.
  • Designed to prevent debt from exceeding the 60% EU benchmark with high probability.
• Expenditure Rule:
  • Based on multi-year ceilings.
  • Aims to ensure fiscal discipline and alignment with the debt objective.
• Fiscal Reaction Function:
  • Provides operational guidance for adjusting spending based on economic conditions.
  • Helps reduce procyclical bias in fiscal policy.
• Additional Features:
  • Escape Clause: To allow flexibility in exceptional circumstances.
  • Triggering Conditions: To activate the rule when fiscal risks increase.
  • Correction Mechanism: To address deviations from the anchor.
  • Independent Oversight: To ensure transparency and credibility.
  • Periodic Reviews: To update the framework based on new data and economic conditions.

Broader Applicability

• The methodology used in this paper can be applied to other countries, especially those with highly concentrated tax revenues and significant MNE activity.
• The use of GNI as a denominator* is particularly relevant for countries where GDP is distorted by MNE activities.
• The paper emphasizes the importance of data availability in designing effective fiscal rules.

Recommendations

• Adopt a prudent debt anchor based on GNI or GDP*.
• Implement multi-year expenditure ceilings to guide fiscal policy.
• Use a fiscal reaction function to ensure responsiveness to economic conditions.
• Ensure transparency, credibility, and predictability in fiscal policy to support investment and economic growth.