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Interest Income and Household Savings: Evidence Based on the Maturation of Postal Savings Certificates


  • Noriko Inakura
  • Satoshi Shimizutani


Japan's traditionally high household saving rate has declined substantially since the early 1990s. While this decline is often explained as a result of the rapid increase in the population share of the elderly who are dissaving, we argue that the cause is a decline in interest income triggered by falling interest rates. To examine our hypothesis, we focus on the effect of the maturation of relatively high-yielding postal savings certificates. Estimating a savings function, we find that the reduction in interest income caused by the maturation of the postal saving certificates reduced household saving rates by 3 percentage points.

Suggested Citation

  • Noriko Inakura & Satoshi Shimizutani, 2006. "Interest Income and Household Savings: Evidence Based on the Maturation of Postal Savings Certificates," Hi-Stat Discussion Paper Series d06-165, Institute of Economic Research, Hitotsubashi University.
  • Handle: RePEc:hst:hstdps:d06-165

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    interest rate income; household saving rate; postal saving certificate;

    JEL classification:

    • D12 - Microeconomics - - Household Behavior - - - Consumer Economics: Empirical Analysis
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • G29 - Financial Economics - - Financial Institutions and Services - - - Other

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