This question <50|271> overall <51|53> Kalmerico: <51|148>.  
  Question 86: Use-value is the quality of the commodity, and exchange-value is its quantity. Right or wrong?   
  [52] Kalmerico: The statement is wrong for it assumes that exchange value cannot have qualities and use value cannot have quantities. While it is true that use value deals with how well a commodity functions, or how well it is built, etc. and exchange value is the price (which suggests quantitative measurements), to state these as being the definition of their on functions would be incorrect. Exchange value can have qualities also, which can be derived from a social aspect of society as exchange proportions change with time and place.   
  Hans: Your first sentence formulates it very well.   
  Regarding your last sentence, Marx does not talk much about the quality of exchange-value, but he stresses the quality of the underlying value and the labor which makes up this value. In his theory value is something real, it is a social substance with its own quality that determines how it acts.   
 
 
 
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