资源环境科技发展态势分析平台

In the literature on fiscal sustainability, the Domar condition and Bohn’s condition are often used to check whether a government’s debt situation is in a dangerous zone. We first show that the Domar condition is obtained only from the government budget constraint (namely the supply of government bonds) and does not take into account the demand for government bonds. Second, we reveal that Bohn’s condition does not satisfy the condition of economic stability: even if this is satisfied, economic recovery may not be achieved. We propose a new condition that satisfies both the stability of the government budget and the recovery of the economy. Our empirical findings from Japan demonstrate that to achieve fiscal sustainability, both sides of the Japanese government budget (expenditure and revenue) must be simultaneously adjusted while the decline in government expenditure has to exceed the increase in tax revenue. In addition, we provide a comparative analysis of Japan and Greece as evidence of the aforementioned condition and prove that although Japan’s debt-to-GDP ratio is higher than that of Greece, its bond market remains stable. This is because it comes from the demand side of the market and investors have greater confidence in this economy due to its lower credit risk rooted in the country’s macroeconomic strength and more auspicious economic future.

WORKING PAPER NO: 851