Niels Thygesen & Kumaraswamy Velupillai 
Business Cycles: Theories, Evidence and Analysis [PDF ebook] 

The new classical revolution seems to have transformed macroeconomics into the theory of economic fluctuations. It is, in a sense, a return to the origins of macroeconomics as a discipline as fashioned by Hayek, Keynes and Lindahl. But the scope has shifted in the intervening five decades and more. It is this new scope — and the new tools that forge its expansion — that are surveyed and analysed in this volume.