Let a consumer's marginal propensity to consume be 0.4. The current CPI is 150, and the future CPI is 180. The nominal interest rate is 50%. The consumer receives a current tax cut of 70 dollars, and expects to receive a future tax increase of 40 dollars. By what dollar amount does the consumer's saving change? (Give an increase as a positive, and a decrease as a negative number.)
求助如何计算
谢谢