These volumes contain key texts from the period 1860-1939, covering a long list of Anglo-Saxon writers, as well as the most important contributions from the French, German, Italian, Russian and Swedish debates. The older business cycle theories presented here richly elucidate the complex interaction between real, monetary and structural change factors in economic systems -- providing a fertile source of inspiration for current researchers. This second part is organised around the themes of economic growth, technical change and business cycles; the accelerator, overaccumulation and underconsumption; saving, investment and expectations; and quantitative business cycle analysis.