According to Karl Marx (second volume of Das Kapital, end of chapter 7) the turnover of capital influences "the processes of production and self-expansion", the two new forms of capital, circulating and fixed, "accrue to capital from the process of circulation and affect the form of its turnover". In the following chapter Marx defines fixed capital and circulating capital. In chapter 9 he claims: "We have here not alone quantitative but also qualitative difference."
