Saving and interest rates in Japan: Why they have fallen and why they will remain low

This paper quantifies the role of alternative shocks in accounting for the recent declines in Japanese saving rates and interest rates and provides some projections about their future course. We consider three distinct sources of variation in saving rates and real interest rates: changes in fertility rates, changes in survival rates, and changes in technology. The empirical relevance of these factors is explored using a computable dynamic OLG model. We find that the combined effects of demographics and slower total factor productivity growth successfully explain both the levels and the magnitudes of the declines in the saving rate and the after-tax real interest rate during the 1990s. Model simulations indicate that the Japanese savings puzzle is over.

The saving rate in Japan: Why it has fallen and why it will remain low

During the 1990s, Japan began experiencing demographic changes that are larger and more rapid than in other OECD countries. These demographic changes will become even more pronounced in future years. We are interested in understanding the role of lower fertility rates and aging for the evolution of Japan?s saving rate. We use a computable general equilibrium model to analyze the response of the national saving rate to changes in demographics and total factor productivity. In our model aging accounts for 2 to 3 percentage points.