一个经济，其失业处于自然率水平，工会预期下一年的通货膨胀率为5％。并且他们有能力使下一年名义工

一个经济，其失业处于自然率水平，工会预期下一年的通货膨胀率为5％。并且他们有能力使下一年名义工资增加5％，如果下一年的实际的通货膨胀率为5％，实际工资、就业和产量会有什么变化 如果实际通货膨胀率低于或高于5％，情况又会如何 Consider an economy in which unemployment is at its natural rate，unions expect next year’s inflation rate to be 5 percent．and they are able to obtain a 5 percent nominal wage increase for next year．What happens to real wages，employment，and output if actual inflation next year is 5 percent What if it is lower or higher than 5 percent