The value-form or form of value (German: Wertform) is a concept in Karl Marx's critique of political economy. Marx's account of the value-form is differently adopted in later forms of Marxism, in the Frankfurt School and in post-Marxism. When social labor is split up into independent enterprises and organized capitalistically, its products take the form of an ensemble of commodities of diverse types, which face one another on the market. Production and exchange are governed by ideas and facts expressible in the forms like: * Toast (two slices) = $1