What causes changes in the effects of fiscal policy? A case study of Japan

The following are the main results of the study. First, we found that the diffusion index of the attitudes of financial institutions toward lending and the yearly change in the annual average of the quarterly ratios of the structural primary budget balance to potential GDP significantly reject the null hypothesis; therefore, we concluded that these variables have a definite impact on fiscal expansion effects. Second, the resulting impulse response functions show that the effects are traditional, although there are some notable differences. In particular, when banks' attitude toward lending is tight and the financial condition of the government is bad, the demand-enhancing effects of government expenditure should be considered weak. In this regard, the traditional accelerator effects of private investment, the existence of liquidity-constrained households, and non-Keynesian effects are key operative concepts.