The purpose of this book is to explain the changes in specific macroeconomic variables such as the relative share of labour, the profit rate and the real wage rate in advanced capitalist economies, in relation to the influence of the business cycle in income distribution. To explain these changes the author examines three types of theory - Kaldorian theory, the Real Business Cycle theory, and the new Keynesian theory - with a specific focus on Kaldor's approach.