For the Marxist definition of a commodity, see Commodity (Marxism). In classical political economy and especially Karl Marx's critique of political economy, a commodity is any good or service produced by human labour and offered as a product for general sale on the market. Some other priced goods are also treated as commodities, e.g. human labor-power, works of art and natural resources, even although they may not be produced specifically for the market, or be non-reproducible goods.
Marx's analysis of the commodity is intended to help solve the problem of what establishes the economic value of goods, using the labor theory of value. This problem was extensively debated by Adam Smith, David Ricardo and Karl Rodbertus-Jagetzow among others. Value and price are not equivalent terms in economics, and theorising the specific relationship of value to market price has been a challenge for both liberal and Marxist economists.A commodity is anything for which there is demand, but which is supplied without qualitative differentiation across a market. It is a product that is the same no matter who produces it, such as petroleum, notebook paper, or milk. [1]In other words, copper is copper. Rice is rice. Stereos, on the other hand, have many levels of quality. And, the better a stereo is, the more it will cost. The price of copper is universal, and fluctuates daily based on global supply and demand.
One of the characteristics of a commodity good is that its price is determined as a function of its market as a whole. Well-established physical commodities have actively traded spot and derivative markets. Generally, these are basic resources and agricultural products such as iron ore, crude oil, coal, ethanol, salt, sugar, coffee beans, soybeans, aluminum, rice, wheat, gold and silver.
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