Mihăilă, Emilia - In: Annals of the University of Petrosani, Economics 2 (2002), pp. 114-125
The economists are, usually, using the concept of opportunity cost, which means the cost used to measure the value of all the things at which must be renounced in order to obtain something else. The measure of the opportunity cost can be identical, but not always, with the money expenses through...