假定失业与通货膨胀之间的取舍关系是由菲利普斯曲线决定的：u=u n -α(π-π e )。式中，u为失业率；u n 为自然失业率；π为通货膨胀率；而π e 为预期的通货膨胀率。此外，假定民主党总是遵循高货币增长的政策，而共和党总是遵循低货币增长的政策。你预测在以下条件下通货膨胀与失业之间“政治性经济周期”的形式是什么? a．根据一枚硬币的随机抛掷，每4年两党中的一党执政。[提示：在大选之前预期的通货膨胀将如何?] b．两党轮流执政。 Suppose that the tradeoff between unemployment and inflation is determined by the Phillips curve: u=u n -α(π-π e ), where u denotes the unemployment rate, u n the natural rate, π the rate of inflation, and π e the expected rate of inflation. In addition, suppose that the Democratic party always follows a policy of high money growth and the Republican party always follows a policy of low money growth. What“political business cycle”pattern of inflation and unemployment would you predict under the following conditions? a．Every four years, one of the parties takes control based on a random flip of a coin. (Hint: What will expected inflation be prior to the election?) b．The two parties take turns.