[size=10.000000pt]1.Theory ahead of business cycle measurement
                                        [size=10.000000pt]  Edward C.Prescott
Federal Reserve Bank of Minneapolis Quarterly Review
[size=10.000000pt] (1986) Fall, pp. 9–22  

2.
Some skeptical observations on real business cycle theory
Lawrence H.Summers
Federal Reserve Bank of Minneapolis Quarterly Review

3.
Understanding real business cycle
Charles I.Plosser
Journal of Economic Perspectives (1989) 3, Summer


以上三篇是宏观经济学关于Business cycle  的经典文章。
但是我在读了英文原文之后，对于三位作者在整篇文章中所要表达的中心观点和思想仍然一知半解，糊里糊涂的。
麻烦谁可以用中文帮助我理解这三篇的中心观点和思想呢。
万分感谢！！!