Labour Theory of Value When you produce something, it costs you the time that you put into it. When, for example, you cook a meal, it might take you an hour to prepare the food. But imagine all the hours that have also gone into that meal indirectly: the time spent growing and preparing the ingredients, the time spent transporting and collecting them, the time spent honing your cooking skills, the time spent making the utensils. Commodities, i.e. products that are bought and sold, have value (economic or exchange value) because of the average labour time put into them. So for example wool, in the abstract, has a value based on the amount of time it takes society (or the average worker) to make wool. It's average labour time which determines the overall value of wool in the abstract because some people can produce more or less in a given amount of time, but if the whole of society set about producing wool then the time it took to produce that wool per worker would by definition be t...