2024-08-26-韩国央行-考虑异质性家庭利率敞口的加息对消费的影响（英）_14页_1mb

Key Issues Summary

Impact of Interest Rate Increases on Consumption

1. Consumption Drag: High prices and interest rates have slowed private consumption since late 2022. Real interest rates have climbed, and household interest burdens (mortgage and unsecured loans) are 2-3 percentage points higher than pre-rate hike levels, dampening consumption.

2. Intertemporal Substitution Effect: Higher rates typically increase savings and reduce current consumption. Significant gains in household interest-bearing assets (e.g., deposits) suggest this effect is active.

3. Heterogeneous Rate Exposure (URE):

   • Losses (W-HtM): Households with high short-term debt, lower assets, and high consumption (young, upper-middle income) saw consumption decline sharply.
   • Gains (Wealthy): Older, high-income households with large assets increased consumption but have low marginal propensity to consume (MPC).
   • Vulnerable (P-HtM): Low-income households with neutral URE saw minimal changes.

4. Aggregation Impact: URE redistribution increased consumption slowdown by over 20% compared to intertemporal substitution alone. Uneven asset structures and high interest dependency (e.g., variable-rate debt) amplify this effect.

5. Policy Implications:

   • If rates decline with price stability, consumption may recover, but high prices could hinder recovery.
   • Policy should manage household debt, especially for 30-40 age groups, to prevent debt resurgences delaying consumption.

Supporting Analysis

• URE Measurement: Defined based on assets/liabilities maturing/repricing within a year.
• Assets/Liability Structure: W-HtM have high liquid liabilities and lower assets; Wealthy hold significant liquid assets.
• MPC by Household Type: W-HtM (0.14-0.17), P-HtM (0.13-0.15), Wealthy (0.11-0.15). MPC declines with higher liquid assets.
• Heterogeneity:
  • Consumption responses to rates significantly vary by age, income, and asset liquidity.
  • Younger households (30-40) and those with high consumption face substantial consumption declines.

Conclusion

Higher rates slow total consumption due to both intertemporal substitution and URE redistribution. W-HtM groups experience the steepest declines, while the wealthy show little impact. This heterogeneity necessitates debt management policies to support vulnerable households and foster sustainable consumption recovery as rates may fall.