问答题 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=uⁿ-α(π-π^e)。式中，u为失业率；uⁿ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=uⁿ-α(π-π^e), where u denotes the unemployment rate, uⁿ 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.