Many commodities (including energy, agricultural products and metals) are sold both on spot markets and through long-term contracts which commit the parties to exchange the commodity in each of a number of spot market periods. This paper shows how the length of contracts affects the possibility...

This paper investigates price competition in a segmented market. Each segment contains one seller and one consumer, and consumers incur transportation costs when they buy from a seller located in another segment. We consider several competing theoretical solutions to this game and compare the...