(Wall Street Journal) In the computer industry, cross- elasticities of demand are quite important. For example, we know that computers and computer software are com- plements, and the cross-elasticity of demand would tell us how strong that relationship is. Read the "Personal Tech- nology" column in Thursday's Wall Street Journal and find a story that describes pricing of computer hardware or software. Based on what you know about the relationships among different types of computers, among different types of software, and between computers and software, try to predict the effects of the price change. How will the change affect the quantity demanded of the item described? How will it affect the demand for substitutes and complements to that item?