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Government Debts Under Volatile Price Changes: Simulation Analysis of Japanese Government Bonds


This paper is intended as an investigation of the trend of real central government debts, considering the relationship between inflation rates and fiscal sustainability. Hyper-inflation would decrease the real government debts drastically, but if it is not the case then price stability is an important element for fiscal sustainability.

This paper argues that a government cannot use inflation as a method to reduce the real burden of debts. This result comes from the theoretical reasoning that variability of price changes brings higher nominal interest rates by adding a risk premium to them under uncertain fiscal conditions. We discuss that if nominal interest rates have more than one-for-one effects on the expected inflation rate then high inflation rather increases real debts. Such effects are especially important in Japan where most government debts are issued in fixed nominal terms. This paper also shows asymmetric effects of deflation and inflation on real government debts. In a deflationary economy, nominal interest rates have a zero bound so that real interest rates would be higher with deflation.

We also show the fiscal condition quantitatively for cases of Japan’s central government debts, using simulation methods. The recent trend of government debts since 2002 is equivalent to the case of about 1.0% to 1.5% deflation, with 15 trillion yen primary deficits on average. As for the future trend, a primary surplus of about 14 to 25 trillion yen per year would be required to sustain the current level of the debt to GDP ratio for 20 years. −1% and 2% of price changes have almost the same effect on real debts, and 0% inflation would minimize them.

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  • Bohn, H. 1995. The sustainability of budget deficits in a stochastic economy, Journal of Money, Credits, and Banking 27:257–271.

    Article  Google Scholar 

  • Darby, M.R. 1975. The financial and tax effects of monetary policy on interest rates, Economic Inquiry 13(2): 266–276.

    Article  Google Scholar 

  • Fukuda, S. and H. Teruyama. 1994. The sustainability of budget deficits in Japan, Hitotsubashi Journal of Economics 35: 109–119.

    Google Scholar 

  • Hamilton, J. D. and M. A. Flavin. 1986. On the limitation of government borrowing: A framework for empirical testing, American Economic Review 76(4): 808–819.

    Google Scholar 

  • Kremers, J. J. 1989. U.S. federal indebtedness and the conduct of fiscal policy, Journal of Monetary Economics 21: 219–238.

    Article  Google Scholar 

  • Morita, Y. and S. Miyagawa. 2003. The Fisher Effect and The Long- Run Phillips Curve —in the case of Japan, Sweden and Italy, Göteborg University. School of Business, Economics and Law, Working Papers in Economics 77.

  • Mundell, R. 1963. Inflation and real interest, Journal of Political Economy 71: 280–283.

    Article  Google Scholar 

  • 1965. Growth, Stability and Inflationary Finance, Journal of Political Economy 73: 97–109.

    Article  Google Scholar 

  • Tobin, J. 1965. Money and economic growth, Econometrica 33: 671–684.

    Article  Google Scholar 

  • Wilcox, D. W. 1989. The sustainability of government deficits: Implications of the present-value borrowing constraint, Journal of Money, Credits, and Banking 21(3): 291–306.

    Article  Google Scholar 

  • Woodford, M. 1995. Price level determinacy without control of a monetary aggregate. Carnegie Rochester Conference Series on Public Policy 43:1–46.

    Article  Google Scholar 

  • 1996. Control of public debt: a requirement for price stability, NBER Working Paper 5684.

    Google Scholar 

  • 2001. Fiscal requirements for price stability, Journal of Money, Credit and Banking 33(3): 669–728.

    Article  Google Scholar 

  • Asako K., S. Fukuda, H. Teruyama, J. Tsuneki, K. Kubo, T. Tsukamoto, M. Ueno, and N. Umanoki 1993. Economic Analysis 131 (浅子和美・福田慎一・照山博司・常木淳・久保克行・塚本隆・上野大・午来直之 1993. 「日本の財政運営と異時点間の資源配分」『経済分析』第(in Japanese).

  • Ihori T., R. Kato, H. Nakano, T. Nakazato, T. Doi, H. Kondo, and M. Sato. 2002. Economic Analysis 163 (井堀利宏・加藤竜太・中野英夫・中里透・土居丈朗・近藤広紀・佐藤正一 (in Japanese).

  • Kamae H. 1999. Nihon no Shoken Kinyushijo no Koritsusei, Yuhikaku (『日本の証券・金融市場の効率性』有斐閣) (in Japanese).

    Google Scholar 

  • Doi, T. and T. Nakazato 1998. The sustainability of national and local government deficits in Japan, Financial Review 47:76–105 (土居丈朗・中里透 1998. 「国債と地方債の持続可能性」『フィナンシャル・レビュー』 47) (in Japanese).

    Google Scholar 

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An earlier version of this paper was presented at the 12th JEPA International Conference at Sapporo University in 2013. I am so grateful to Professor Yuko Hirai (Chiba University of Commerce) and participants of the conference for their helpful comments. I would like to thank anonymous referees for valuable suggestions to improve the quality of this paper.

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Correspondence to Masao Tsuri.

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Tsuri, M. Government Debts Under Volatile Price Changes: Simulation Analysis of Japanese Government Bonds. IJEPS 9, 20–42 (2014).

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