This paper shows the difficulties associated with discerning the impact of learning and pressures of competitive entry on the price and cost of production in commodity markets. It shows that the patterns of price and cost movements over time will be dramatically affected by the entry of new...

A generalized financial/product portfolio theory is developed, based on the underlying economic factors determining product profitability and risk, for applications involving the firm's product investment decisions. The model developed provides a means for differentiating market related risk and...