答案和详解如下： Q1. According to mainstream business cycle theory, business cycles are caused primarily by variations in: A) aggregate demand. B) productivity. C) technological improvements. Correct answer is A) Mainstream business cycle theory states that business cycles are caused by changes in aggregate demand. If aggregate demand would remain study over time rather than fluctuating, the magnitude of business cycles would be reduced greatly. Real business theory states that business cycles are due to fluctuations in worker productivity, which in turn is caused by the variability of technological changes. Q2. Which business cycle theory proposes that the growth rate of potential real GDP fluctuates over time? A) Mainstream business cycle theory. B) Real business cycle theory. C) Both real business cycle theory and mainstream business cycle theory. Correct answer is B) Real business cycle theory proposes that potential real GDP fluctuates as worker’s productivity fluctuates. Mainstream business cycle theory states that the growth of real GDP will remain fairly stable over time. Q3. Which of the following business cycle theories proposes that only unexpected changes in aggregate demand causes economic cycles? A) New Classical. B) New Keynesian. C) Monetarist. Correct answer is A) New classical economists believe that only unexpected changes in demand cause economic cycles. New Keynesian economists believe that both expected and unexpected changes in demand lead to business cycles. Monetarists believe that fluctuations in aggregate demand are due to the variability of the growth rate of the money supply.
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发表于 2009-1-15 16:13
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