Question: 1. Why is it efficient to limit the duration of patents and copyrights, whereas real property rights endure almost forever (with an important exception to be noted later in this chapter)?
2. Trademark law does not allow a holder to sell a trademark independent of the good to which it is attached. Thus, Coca-Cola cannot sell its use of the trademark "Coke" to another producer of cola syrup; that mark may be sold only with the syrup produced by or under the supervision of the Coca Cola Company. Can you provide an economic rationale for this restriction?