(a) 何謂自然失業率 (natural rate of unemployment)？ (5 分)

三、簡答題(共 50 分，中、英文作答皆可) 1. Suppose that Taipei consumers pay twice as much for avocados as for tangerines, whereas Kaohsiung consumers pay half as much for avocados as for tangerines. Assuming that consumers maximize their utility, which city's consumers have a higher marginal rate of substitution of avocados for tangerines? Explain your answer. (4 pts)